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design and shear strength</title> <meta name="description" content="Search results for: limit states design and shear strength"> <meta name="keywords" content="limit states design and shear strength"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research 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method="get" action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="limit states design and shear strength"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 20001</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: limit states design and shear strength</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19731</span> The Effect of Enamel Surface Preparation on the Self-Etch Bonding of Orthodontic Tubes: An in Vitro Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fernandes%20A.%20C.%20B.%20C.%20J.">Fernandes A. C. B. C. J.</a>, <a href="https://publications.waset.org/abstracts/search?q=de%20Jesus%20V.%20C."> de Jesus V. C.</a>, <a href="https://publications.waset.org/abstracts/search?q=Sepideh%20N."> Sepideh N.</a>, <a href="https://publications.waset.org/abstracts/search?q=Vilela%20OFGG"> Vilela OFGG</a>, <a href="https://publications.waset.org/abstracts/search?q=Somarin%20K.%20K."> Somarin K. K.</a>, <a href="https://publications.waset.org/abstracts/search?q=Fran%C3%A7a%20R."> França R.</a>, <a href="https://publications.waset.org/abstracts/search?q=Pinheiro%20F.%20H.%20S.%20L."> Pinheiro F. H. S. L.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Objective: The purpose of this study was to look at the effect of pre-treatment of enamel with pumice and/or 37% phosphoric acid on the shear bond strength (SBS) of orthodontic tubes bonded to enamel while simultaneously evaluating the efficacy of orthodontic tubes bonded by self-etch primer (SEP). Materials and Methods: 39 of the crown halves were divided into 3 groups at random. Group, I was the control group utilizing both prophy paste and the conventional double etching pre-treatment method. Group II excluded the use of prophy paste prior to double etching. Group III excluded the use of both prophy paste and double etching and only utilized SEP. Bond strength of the orthodontic tubes was measured by SBS. One way ANOVA and Tukey’s HSD test were used to compare SBS values between the three groups. The statistical significance was set to p<0.05. Results: The difference in SBS values of groups I (36.672 ± 9.315 Mpa), II (34.242 ± 9.986 Mpa), and III (39.055 ± 5.565) were not statistically significant (P<0.05). Conclusion: This study suggested that the use of prophy paste or pre-acid etch of the enamel surface did not provide a statistically significant difference in SBS between the three groups. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shear%20bond%20strength" title="shear bond strength">shear bond strength</a>, <a href="https://publications.waset.org/abstracts/search?q=orthodontic%20bracket" title=" orthodontic bracket"> orthodontic bracket</a>, <a href="https://publications.waset.org/abstracts/search?q=self-etch%20primer" title=" self-etch primer"> self-etch primer</a>, <a href="https://publications.waset.org/abstracts/search?q=pumice" title=" pumice"> pumice</a>, <a href="https://publications.waset.org/abstracts/search?q=prophy" title=" prophy"> prophy</a> </p> <a href="https://publications.waset.org/abstracts/142849/the-effect-of-enamel-surface-preparation-on-the-self-etch-bonding-of-orthodontic-tubes-an-in-vitro-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142849.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">178</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19730</span> The Effect of Cassava Starch on Compressive Strength and Tear Strength of Alginate Impression Material</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mirna%20Febriani">Mirna Febriani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Statement of problem. Alginate impression material is an imported material and a dentist always used this material to make impression of teeth and oral cavity tissues. Purpose. The aim of this study was to compare about compressive strength and tear strength of alginate impression material and alginate impression material combined with cassava. Material and methods.Property measured included compressive strength and tear strength. Results.The compressive strength and tear strength of the impression materials tested of a comparable ANSI/ADA standard no.18.The compressive strength and tear strength alginate impression material combined with cassava have lower than the compressive strength and tear strength alginate impression material. The alginate impression material combined with cassava has more water and silica content more decrease than alginate impression material. Conclusions.We concluded that compressive strength and tear strength of alginate impression material combined with cassava has lower than alginate impression material without cassava starch. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title="compressive strength">compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=tear%20strength" title=" tear strength"> tear strength</a>, <a href="https://publications.waset.org/abstracts/search?q=Cassava%20starch" title=" Cassava starch"> Cassava starch</a>, <a href="https://publications.waset.org/abstracts/search?q=alginate" title=" alginate"> alginate</a> </p> <a href="https://publications.waset.org/abstracts/64938/the-effect-of-cassava-starch-on-compressive-strength-and-tear-strength-of-alginate-impression-material" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64938.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">424</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19729</span> Suitability Number of Coarse-Grained Soils and Relationships among Fineness Modulus, Density and Strength Parameters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khandaker%20Fariha%20Ahmed">Khandaker Fariha Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Noman%20Munshi"> Md. Noman Munshi</a>, <a href="https://publications.waset.org/abstracts/search?q=Tarin%20Sultana"> Tarin Sultana</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Zoynul%20Abedin"> Md. Zoynul Abedin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Suitability number (SN) is perhaps one of the most important parameters of coarse-grained soil in assessing its appropriateness to use as a backfill in retaining structures, sand compaction pile, Vibro compaction, and other similar foundation and ground improvement works. Though determined in an empirical manner, it is imperative to study SN to understand its relation with other aggregate properties like fineness modulus (FM), and strength and density properties of sandy soil. The present paper reports the findings of the study on the examination of the properties of sandy soil, as mentioned. Random numbers were generated to obtain the percent fineness on various sieve sizes, and fineness modulus and suitability numbers were predicted. Sand samples were collected from the field, and test samples were prepared to determine maximum density, minimum density and shear strength parameter φ against particular fineness modulus and corresponding suitability number Five samples of SN value of excellent (0-10) and three samples of SN value fair (20-30) were taken and relevant tests were done. The data obtained from the laboratory tests were statistically analyzed. Results show that with the increase of SN, the value of FM decreases. Within the SN value rated as excellent (0-10), there is a decreasing trend of φ for a higher value of SN. It is found that SN is dependent on various combinations of grain size properties like D10, D30, and D20, D50. Strong linear relationships were obtained between SN and FM (R²=.0.93) and between SN value and φ (R²=.94). Correlation equations are proposed to define relationships among SN, φ, and FM. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=density" title="density">density</a>, <a href="https://publications.waset.org/abstracts/search?q=fineness%20modulus" title=" fineness modulus"> fineness modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20strength%20parameter" title=" shear strength parameter"> shear strength parameter</a>, <a href="https://publications.waset.org/abstracts/search?q=suitability%20number" title=" suitability number"> suitability number</a> </p> <a href="https://publications.waset.org/abstracts/115362/suitability-number-of-coarse-grained-soils-and-relationships-among-fineness-modulus-density-and-strength-parameters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/115362.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">104</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19728</span> Comparison and Improvement of the Existing Cone Penetration Test Results: Shear Wave Velocity Correlations for Hungarian Soils</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=%C3%81kos%20Wolf">Ákos Wolf</a>, <a href="https://publications.waset.org/abstracts/search?q=Richard%20P.%20Ray"> Richard P. Ray</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to the introduction of Eurocode 8, the structural design for seismic and dynamic effects has become more significant in Hungary. This has emphasized the need for more effort to describe the behavior of structures under these conditions. Soil conditions have a significant effect on the response of structures by modifying the stiffness and damping of the soil-structural system and by modifying the seismic action as it reaches the ground surface. Shear modulus (<em>G</em>) and shear wave velocity (<em>v<sub>s</sub></em>), which are often measured in the field, are the fundamental dynamic soil properties for foundation vibration problems, liquefaction potential and earthquake site response analysis. There are several laboratory and in-situ measurement techniques to evaluate dynamic soil properties, but unfortunately, they are often too expensive for general design practice. However, a significant number of correlations have been proposed to determine shear wave velocity or shear modulus from Cone Penetration Tests (CPT), which are used more and more in geotechnical design practice in Hungary. This allows the designer to analyze and compare CPT and seismic test result in order to select the best correlation equations for Hungarian soils and to improve the recommendations for the Hungarian geologic conditions. Based on a literature review, as well as research experience in Hungary, the influence of various parameters on the accuracy of results will be shown. This study can serve as a basis for selecting and modifying correlation equations for Hungarian soils. Test data are taken from seven locations in Hungary with similar geologic conditions. The shear wave velocity values were measured by seismic CPT. Several factors are analyzed including soil type, behavior index, measurement depth, geologic age etc. for their effect on the accuracy of predictions. The final results show an improved prediction method for Hungarian soils <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CPT%20correlation" title="CPT correlation">CPT correlation</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20soil%20properties" title=" dynamic soil properties"> dynamic soil properties</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20CPT" title=" seismic CPT"> seismic CPT</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20wave%20velocity" title=" shear wave velocity"> shear wave velocity</a> </p> <a href="https://publications.waset.org/abstracts/67782/comparison-and-improvement-of-the-existing-cone-penetration-test-results-shear-wave-velocity-correlations-for-hungarian-soils" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67782.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">246</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19727</span> Modern Seismic Design Approach for Buildings with Hysteretic Dampers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vanessa%20A.%20Segovia">Vanessa A. Segovia</a>, <a href="https://publications.waset.org/abstracts/search?q=Sonia%20E.%20Ruiz"> Sonia E. Ruiz </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of energy dissipation systems for seismic applications has increased worldwide, thus it is necessary to develop practical and modern criteria for their optimal design. Here, a direct displacement-based seismic design approach for frame buildings with hysteretic energy dissipation systems (HEDS) is applied. The building is constituted by two individual structural systems consisting of: 1) A main elastic structural frame designed for service loads and 2) A secondary system, corresponding to the HEDS, that controls the effects of lateral loads. The procedure implies to control two design parameters: A) The stiffness ratio (α=K_frame/K_(total system)), and B) The strength ratio (γ= V_damper / V_(total system)). The proposed damage-controlled approach contributes to the design of a more sustainable and resilient building because the structural damage is concentrated on the HEDS. The reduction of the design displacement spectrum is done by means of a damping factor (recently published) for elastic structural systems with HEDS, located in Mexico City. Two limit states are verified: Serviceability and near collapse. Instead of the traditional trial-error approach, a procedure that allows the designer to establish the preliminary sizes of the structural elements of both systems is proposed. The design methodology is applied to an 8-story steel building with buckling restrained braces, located in soft soil of Mexico City. With the aim of choosing the optimal design parameters, a parametric study is developed considering different values of α and γ. The simplified methodology is for preliminary sizing, design, and evaluation of the effectiveness of HEDS, and it constitutes a modern and practical tool that enables the structural designer to select the best design parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage-controlled%20buildings" title="damage-controlled buildings">damage-controlled buildings</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20displacement-based%20seismic%20design" title=" direct displacement-based seismic design"> direct displacement-based seismic design</a>, <a href="https://publications.waset.org/abstracts/search?q=optimal%20hysteretic%20energy%20dissipation%20systems" title=" optimal hysteretic energy dissipation systems"> optimal hysteretic energy dissipation systems</a>, <a href="https://publications.waset.org/abstracts/search?q=hysteretic%20dampers" title=" hysteretic dampers"> hysteretic dampers</a> </p> <a href="https://publications.waset.org/abstracts/22154/modern-seismic-design-approach-for-buildings-with-hysteretic-dampers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22154.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">483</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19726</span> Comparative Study on the Effect of Compaction Energy and Moisture Content on the Strength Properties of Lateritic Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Idris">Ahmad Idris</a>, <a href="https://publications.waset.org/abstracts/search?q=O.A.%20Uche"> O.A. Uche</a>, <a href="https://publications.waset.org/abstracts/search?q=Ado%20Y%20Abdulfatah"> Ado Y Abdulfatah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lateritic soils are found in abundance and are the most common types of soils used in construction of roads and embankments in Nigeria. Strength properties of the soils depend on the amount of compaction applied and the amount of water available in the soil at the time of compaction. In this study, the influence of the compactive effort and that of the amount of water in the soil in the determination of the shear strength properties of lateritic soil was investigated. Lateritic soil sample was collected from an existing borrow pit in Kano, Nigeria and its basic characteristics were determined and the soil was classified according to AASHTO classification method. The soil was then compacted under various compactive efforts and at wide range of moisture contents. The maximum dry density (MDD) and optimum moisture content (OMC) at each compactive effort was determined. Unconfined undrained triaxial test was carried out to determine the shear strength properties of the soil under various conditions of moisture and energy. Preliminary results obtained indicated that the soil is an A-7-5 soil. The final results obtained shows that as the compaction energy is increased, both the cohesion and friction angle increased irrespective of the moisture content used in the compaction. However, when the amount of water in the soil was increased and compaction effort kept constant, only the cohesion of the soil increases while the friction angle shows no any pattern of variation. It was also found that the highest values for cohesion and friction angle were obtained when the soil was compacted at the highest energy and at OMC. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laterite" title="laterite">laterite</a>, <a href="https://publications.waset.org/abstracts/search?q=OMC" title=" OMC"> OMC</a>, <a href="https://publications.waset.org/abstracts/search?q=compaction%20energy" title=" compaction energy"> compaction energy</a>, <a href="https://publications.waset.org/abstracts/search?q=moisture%20content" title=" moisture content"> moisture content</a> </p> <a href="https://publications.waset.org/abstracts/6272/comparative-study-on-the-effect-of-compaction-energy-and-moisture-content-on-the-strength-properties-of-lateritic-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6272.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">407</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19725</span> Investigation of Static Stability of Soil Slopes Using Numerical Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyed%20Abolhasan%20Naeini">Seyed Abolhasan Naeini</a>, <a href="https://publications.waset.org/abstracts/search?q=Elham%20Ghanbari%20Alamooti"> Elham Ghanbari Alamooti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Static stability of soil slopes using numerical simulation by a finite element code, ABAQUS, has been investigated, and safety factors of the slopes achieved in the case of static load of a 10-storey building. The embankments have the same soil condition but different loading distance from the slope heel. The numerical method for estimating safety factors is 'Strength Reduction Method' (SRM). Mohr-Coulomb criterion used in the numerical simulations. Two steps used for measuring the safety factors of the slopes: first is under gravity loading, and the second is under static loading of a building near the slope heel. These safety factors measured from SRM, are compared with the values from Limit Equilibrium Method, LEM. Results show that there is good agreement between SRM and LEM. Also, it is seen that by increasing the distance from slope heel, safety factors increases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=limit%20equilibrium%20%20method" title="limit equilibrium method">limit equilibrium method</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20stability" title=" static stability"> static stability</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20slopes" title=" soil slopes"> soil slopes</a>, <a href="https://publications.waset.org/abstracts/search?q=strength%20reduction%20method" title=" strength reduction method"> strength reduction method</a> </p> <a href="https://publications.waset.org/abstracts/90783/investigation-of-static-stability-of-soil-slopes-using-numerical-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90783.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">163</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19724</span> A First Order Shear Deformation Theory Approach for the Buckling Behavior of Nanocomposite Beams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Pramod%20Kumar">P. Pramod Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Madhu%20Salumari"> Madhu Salumari</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20V.%20Subba%20Rao"> V. V. Subba Rao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to their high strength-to-weight ratio, carbon nanotube (CNTs) reinforced polymer composites are being considered as one of the most promising nanocomposites which can improve the performance when used in structural applications. The buckling behavior is one of the most important parameter needs to be considered in the design of structural members like beams and plates. In the present paper, the elastic constants of CNT reinforced polymer composites are evaluated by using Mori-Tanaka micromechanics approach. Knowing the elastic constants, an analytical study is being conducted to investigate the buckling behavior of nanocomposites for different CNT volume fractions at different boundary conditions using first-order shear deformation theory (FSDT). The effect of stacking sequence and CNT radius on the buckling of beam has also been presented. This study is being conducted primarily with an intension to find the stiffening effect of CNTs when used in polymer composites as reinforcement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CNT" title="CNT">CNT</a>, <a href="https://publications.waset.org/abstracts/search?q=buckling" title=" buckling"> buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=micromechanics" title=" micromechanics"> micromechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=FSDT" title=" FSDT"> FSDT</a> </p> <a href="https://publications.waset.org/abstracts/68803/a-first-order-shear-deformation-theory-approach-for-the-buckling-behavior-of-nanocomposite-beams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68803.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">279</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19723</span> Wall Shear Stress Under an Impinging Planar Jet Using the Razor Blade Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Ritcey">A. Ritcey</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20R.%20Mcdermid"> J. R. Mcdermid</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Ziada"> S. Ziada</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wall shear stress was experimentally measured under a planar impinging air jet as a function of jet Reynolds number (Rejet = 5000, 8000, 11000) and different normalized impingement distances (H/D = 4, 6, 8, 10, 12) using the razor blade technique to complete a parametric study. The wall pressure, wall pressure gradient, and wall shear stress information were obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=experimental%20fluid%20mechanics" title="experimental fluid mechanics">experimental fluid mechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=impinging%20planar%20jets" title=" impinging planar jets"> impinging planar jets</a>, <a href="https://publications.waset.org/abstracts/search?q=skin%20friction%20factor" title=" skin friction factor"> skin friction factor</a>, <a href="https://publications.waset.org/abstracts/search?q=wall%20shear%20stress" title=" wall shear stress"> wall shear stress</a> </p> <a href="https://publications.waset.org/abstracts/25336/wall-shear-stress-under-an-impinging-planar-jet-using-the-razor-blade-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25336.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">322</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19722</span> Pultrusion of Side by Side Glass/Polypropylene Fibers: Study of Flexural and Shear Properties </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Behrooz%20Ataee">Behrooz Ataee</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Golzar"> Mohammad Golzar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main purpose of using side by side (SBS) hybrid yarn in pultrusion thermoplastic method is reprisal the effect of high viscosity in melted thermoplastic and reduction of distance between reinforced fiber and melted thermoplastic. SBS hybrid fiber yarn composed of thermoplastic fibers and fiber reinforcement should be produced in the preparation of pultruded thermoplastic composites prepreg to reach better impregnation. An experimental set-up was designed and built to pultrude continues polypropylene and glass fiber to get obtain a suitable impregnated round prepregs. In final stage, the round prepregs come together to produce rectangular profile. Higher fiber volume fraction produces higher void volume fraction, however the second stage of the production process of rectangular profile and the cold die decrease 50% of the void volume fraction. Results show that whit increasing void volume fraction, flexural and shear strength decrease. Also, under certain conditions of parameters the pultruded profiles exhibit better flexural and shear strength. The pulling speed seems to have the greatest influence on the profile quality. In addition, adding cold die strongly increases the surface quality of rectangular profile. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermoplastic%20pultrusion" title="thermoplastic pultrusion">thermoplastic pultrusion</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20pultrusion" title=" hybrid pultrusion"> hybrid pultrusion</a>, <a href="https://publications.waset.org/abstracts/search?q=side-by-side%20fibers" title=" side-by-side fibers"> side-by-side fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=impregnation" title=" impregnation"> impregnation</a> </p> <a href="https://publications.waset.org/abstracts/57363/pultrusion-of-side-by-side-glasspolypropylene-fibers-study-of-flexural-and-shear-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57363.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">258</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19721</span> Effect of Subsequent Drying and Wetting on the Small Strain Shear Modulus of Unsaturated Soils</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Khosravi">A. Khosravi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Ghadirian"> S. Ghadirian</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20S.%20McCartney"> J. S. McCartney</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Evaluation of the seismic-induced settlement of an unsaturated soil layer depends on several variables, among which the small strain shear modulus, Gmax, and soil’s state of stress have been demonstrated to be of particular significance. Recent interpretation of trends in Gmax revealed considerable effects of the degree of saturation and hydraulic hysteresis on the shear stiffness of soils in unsaturated states. Accordingly, the soil layer is expected to experience different settlement behaviors depending on the soil saturation and seasonal weathering conditions. In this study, a semi-empirical formulation was adapted to extend an existing Gmax model to infer hysteretic effects along different paths of the SWRC including scanning curves. The suitability of the proposed approach is validated against experimental results from a suction-controlled resonant column test and from data reported in literature. The model was observed to follow the experimental data along different paths of the SWRC, and showed a slight hysteresis in shear modulus along the scanning curves. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20hysteresis" title="hydraulic hysteresis">hydraulic hysteresis</a>, <a href="https://publications.waset.org/abstracts/search?q=scanning%20path" title=" scanning path"> scanning path</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20strain%20shear%20modulus" title=" small strain shear modulus"> small strain shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20soil" title=" unsaturated soil"> unsaturated soil</a> </p> <a href="https://publications.waset.org/abstracts/36299/effect-of-subsequent-drying-and-wetting-on-the-small-strain-shear-modulus-of-unsaturated-soils" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36299.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">388</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19720</span> Influencing Factors on Stability of Shale with Silt Layers at Slopes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20K.%20M.%20Badrul%20Alam">A. K. M. Badrul Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Yoshiaki%20Fujii"> Yoshiaki Fujii</a>, <a href="https://publications.waset.org/abstracts/search?q=Nahid%20Hasan%20Dipu"> Nahid Hasan Dipu</a>, <a href="https://publications.waset.org/abstracts/search?q=Shakil%20Ahmed%20Razo"> Shakil Ahmed Razo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shale rockmasses often include silt layers, impacting slope stability in construction and mining. Analyzing their interaction is crucial for long-term stability. A study used an elastoplastic model, incorporating the stress transfer method and Coulomb's criterion, to assess a shale rock mass with silt layers. It computed stress distribution, assessed failure potential, and identified vulnerable regions where nodal forces were calculated for a comprehensive analysis. A shale rock mass ranging from 14.75 to 16.75 meters thick, with silt layers varying from 0.36 to 0.5 meters, was considered in the model. It examined four silt layer conditions: horizontal (SiHL), vertical (SiVL), inclined against slope (SiIincAGS), and along slope (SilincALO). Mechanical parameters like uniaxial compressive strength (UCS), tensile strength (TS), Young’s modulus (E), Poisson’s ratio, and density were adjusted for varied scenarios: UCS (0.5 to 5 MPa), TS (0.1 to 1 MPa), and E (6 to 60 MPa). In elastic analysis of shale rock masses, stress distributions vary based on layer properties. When shale and silt layers have the same elasticity modulus (E), stress concentrates at corners. If the silt layer has a lower E than shale, marginal changes in maximum stress (σmax) occur for SilHL. A decrease in σmax is evident at SilVL. Slight variations in σmax are observed for SilincAGS and SilincALO. In the elastoplastic analysis, the overall decrease of 20%, 40%, 60%, 80%, and 90% was considered. For SilHL:(i) Same E, UCS, and TS for silt layer and shale, UCS/TS ratio 5: strength decrease led to shear (S), tension then shear (T then S) failure; noticeable failure at 60% decrease, significant at 80%, collapse at 90%. (ii) Lower E for silt layer, same strength as shale: No significant differences. (iii) Lower E and UCS, silt layer strength 1/10: No significant differences. For SilVL: (i) Same E, UCS, and TS for silt layer and shale, UCS/TS ratio 5: Similar effects as SilHL. (ii) Lower E for silt layer, same strength as shale: Slip occurred. (iii) Lower E and UCS, silt layer strength 1/10: Bitension failure also observed with larger slip. For SilincAGS: (i) Same E, UCS, and TS for silt layer and shale, UCS/TS ratio 5: Effects similar to SilHL. (ii) Lower E for silt layer, same strength as shale: Slip occurred. (iii) Lower E and UCS, silt layer strength 1/10: Tension failure also observed with larger slip. For SilincALO: (i) Same E, UCS, and TS for silt layer and shale, UCS/TS ratio 5: Similar to SilHL with tension failure. (ii) Lower E for silt layer, same strength as shale: No significant differences; failure diverged. (iii) Lower E and UCS, silt layer strength 1/10: Bitension failure also observed with larger slip; failure diverged. Toppling failure was observed for lower E cases of SilVL and SilincAGS. The presence of silt interlayers in shale greatly impacts slope stability. Designing slopes requires careful consideration of both the silt and shale's mechanical properties. The temporal degradation of strength in these layers is a major concern. Thus, slope design must comprehensively analyze the immediate and long-term mechanical behavior of interlayer silt and shale to effectively mitigate instability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shale%20rock%20masses" title="shale rock masses">shale rock masses</a>, <a href="https://publications.waset.org/abstracts/search?q=silt%20layers" title=" silt layers"> silt layers</a>, <a href="https://publications.waset.org/abstracts/search?q=slope%20stability" title=" slope stability"> slope stability</a>, <a href="https://publications.waset.org/abstracts/search?q=elasto-plastic%20model" title=" elasto-plastic model"> elasto-plastic model</a>, <a href="https://publications.waset.org/abstracts/search?q=temporal%20degradation" title=" temporal degradation"> temporal degradation</a> </p> <a href="https://publications.waset.org/abstracts/182094/influencing-factors-on-stability-of-shale-with-silt-layers-at-slopes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182094.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">56</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19719</span> Anisotropic Shear Strength of Sand Containing Plastic Fine Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaa%20H.%20J.%20Al-Rkaby">Alaa H. J. Al-Rkaby</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Chegenizadeh"> A. Chegenizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20R.%20Nikraz"> H. R. Nikraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anisotropy is one of the major aspects that affect soil behavior, and extensive efforts have investigated its effect on the mechanical properties of soil. However, very little attention has been given to the combined effect of anisotropy and fine contents. Therefore, in this paper, the anisotropic strength of sand containing different fine content (F) of 5%, 10%, 15%, and 20%, was investigated using hollow cylinder tests under different principal stress directions of α = 0° and α = 90°. For a given principal stress direction (α), it was found that increasing fine content resulted in decreasing deviator stress (q). Moreover, results revealed that all fine contents showed anisotropic strength where there is a clear difference between the strength under 0° and the strength under 90°. This anisotropy was greatest under F = 5% while it decreased with increasing fine contents, particularly at F = 10%. Mixtures with low fine content show low contractive behavior and tended to show more dilation. Moreover, all sand-clay mixtures exhibited less dilation and more compression at α = 90° compared with that at α = 0°. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anisotropy" title="anisotropy">anisotropy</a>, <a href="https://publications.waset.org/abstracts/search?q=principal%20stress%20direction" title=" principal stress direction"> principal stress direction</a>, <a href="https://publications.waset.org/abstracts/search?q=fine%20content" title=" fine content"> fine content</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20cylinder%20sample" title=" hollow cylinder sample"> hollow cylinder sample</a> </p> <a href="https://publications.waset.org/abstracts/65471/anisotropic-shear-strength-of-sand-containing-plastic-fine-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65471.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">312</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19718</span> Comparative Analysis of Residual Shear Depiction and Grain Distribution Characteristics of Slide Soil Profile Sections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ephrem%20Getahun">Ephrem Getahun</a>, <a href="https://publications.waset.org/abstracts/search?q=Shengwen%20Qi"> Shengwen Qi</a>, <a href="https://publications.waset.org/abstracts/search?q=Songfeng%20Guo"> Songfeng Guo</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu%20Zou"> Yu Zou</a>, <a href="https://publications.waset.org/abstracts/search?q=Melesse%20Alemayehu"> Melesse Alemayehu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Residual shear characteristics of slide soil profile sections (SSPS) were examined using ring shear tests to know the relative residual shear behaviors among the sections of slide soil. The multistage-multiphase shearing techniques were employed to perform the experiment for each soil specimen continuously towards large displacements. The grain distribution analysis of SSPS samples was characterized by coarsening upward from bottom slip to the top sections; however, the slip surface was considered as a sheared zone that endorses their low shear resistance for failure. There is an average range of 1-2.5 mm axial displacement on each stage of loadings and phases of shearing that depicts the significant effect of dilation and compression of soil specimen. The middle section has the largest consolidation percentage (10-29%), and vertical displacement compared to other sections and showed high shear strengthening behavior having maximum shear stress of 189kPa at 240kPa loading compared to basal and top sections. It is found that the middle section of SSPS has relatively high shear resistance behavior for large displacement shearing. The residual shear assessment indicates that there is a significant influence of large displacement and rate on the friction coefficient behaviors; it resulted in shear weakening effect to attain their residual condition. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=comparison" title="comparison">comparison</a>, <a href="https://publications.waset.org/abstracts/search?q=displacements" title=" displacements"> displacements</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20shear%20stress" title=" residual shear stress"> residual shear stress</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20behavior" title=" shear behavior"> shear behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=slide%20soils" title=" slide soils"> slide soils</a> </p> <a href="https://publications.waset.org/abstracts/102831/comparative-analysis-of-residual-shear-depiction-and-grain-distribution-characteristics-of-slide-soil-profile-sections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102831.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19717</span> Load Transfer of Steel Pipe Piles in Warming Permafrost</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Amirhossein%20Tabatabaei">S. Amirhossein Tabatabaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulghader%20A.%20Aldaeef"> Abdulghader A. Aldaeef</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20T.%20Rayhani"> Mohammad T. Rayhani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As the permafrost continues to melt in the northern regions due to global warming, a soil-water mixture is left behind with drastically lower strength; a phenomenon that directly impacts the resilience of existing structures and infrastructure systems. The frozen soil-structure interaction, which in ice-poor soils is controlled by both interface shear and ice-bonding, changes its nature into a sole frictional state. Adfreeze, the controlling mechanism in frozen soil-structure interaction, diminishes as the ground temperature approaches zero. The main purpose of this paper is to capture the altered behaviour of frozen interface with respect to rising temperature, especially near melting states. A series of pull-out tests are conducted on model piles inside a cold room to study how the strength parameters are influenced by the phase change in ice-poor soils. Steel model piles, embedded in artificially frozen cohesionless soil, are subjected to both sustained pull-out forces and constant rates of displacement to observe the creep behaviour and acquire load-deformation curves, respectively. Temperature, as the main variable of interest, is increased from a lower limit of -10°C up to the point of melting. During different stages of the temperature rise, both skin deformations and temperatures are recorded at various depths along the pile shaft. Significant reduction of pullout capacity and accelerated creep behaviour is found to be the primary consequences of rising temperature. By investigating the different pull-out capacities and deformations measured during step-wise temperature change, characteristics of the transition from frozen to unfrozen soil-structure interaction are studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adfreeze" title="Adfreeze">Adfreeze</a>, <a href="https://publications.waset.org/abstracts/search?q=frozen%20soil-structure%20interface" title=" frozen soil-structure interface"> frozen soil-structure interface</a>, <a href="https://publications.waset.org/abstracts/search?q=ice-poor%20soils" title=" ice-poor soils"> ice-poor soils</a>, <a href="https://publications.waset.org/abstracts/search?q=pull-out%20capacity" title=" pull-out capacity"> pull-out capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=warming%20permafrost" title=" warming permafrost"> warming permafrost</a> </p> <a href="https://publications.waset.org/abstracts/150679/load-transfer-of-steel-pipe-piles-in-warming-permafrost" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150679.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">111</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19716</span> Estimation of Seismic Drift Demands for Inelastic Shear Frame Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Etemadi">Ali Etemadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Polat%20H.%20Gulkan"> Polat H. Gulkan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The drift spectrum derived through the continuous shear-beam and wave propagation theory is known to be useful appliance to measure of the demand of pulse like near field ground motions on building structures. As regards, many of old frame buildings with poor or non-ductile column elements, pass the elastic limits and blurt the post yielding hysteresis degradation responses when subjected to such impulsive ground motions. The drift spectrum which, is based on a linear system cannot be predicted the overestimate drift demands arising from inelasticity in an elastic plastic systems. A simple procedure to estimate the drift demands in shear-type frames which, respond over the elastic limits is described and effect of hysteresis degradation behavior on seismic demands is clarified. Whereupon the modification factors are proposed to incorporate the hysteresis degradation effects parametrically. These factors are defined with respected to the linear systems. The method can be applicable for rapid assessment of existing poor detailed, non-ductile buildings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drift%20spectrum" title="drift spectrum">drift spectrum</a>, <a href="https://publications.waset.org/abstracts/search?q=shear-type%20frame" title=" shear-type frame"> shear-type frame</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffness%20and%20strength%20degradation" title=" stiffness and strength degradation"> stiffness and strength degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=pinching" title=" pinching"> pinching</a>, <a href="https://publications.waset.org/abstracts/search?q=smooth%20hysteretic%20model" title=" smooth hysteretic model"> smooth hysteretic model</a>, <a href="https://publications.waset.org/abstracts/search?q=quasi%20static%20analysis" title=" quasi static analysis"> quasi static analysis</a> </p> <a href="https://publications.waset.org/abstracts/24161/estimation-of-seismic-drift-demands-for-inelastic-shear-frame-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24161.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">524</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19715</span> Structural Anatomy and Deformation Pattern of the Palghat-Cauvery Shear Zone in the Central Sector, Tamil Nadu, Southern India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mrinal%20Mukherjee">Mrinal Mukherjee</a>, <a href="https://publications.waset.org/abstracts/search?q=Gargi%20Seal"> Gargi Seal</a>, <a href="https://publications.waset.org/abstracts/search?q=Bitopan%20Mazumdar"> Bitopan Mazumdar</a>, <a href="https://publications.waset.org/abstracts/search?q=Prakhar%20Agarwal"> Prakhar Agarwal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The central sector of Palghat-Cauvery Shear zone Tamil Nadu, India, had been studied with reference to development, mode of occurrence, interrelationship and variation of structural elements. The litho assemblages of the study area include gneisses migmatites granites and bear signature of multistage deformation patterns. The early deformation D1 is characterized in migmatites and gneisses by the development of tight to isoclinal, recumbent to reclined folds within the compositional bands that are refolded subsequently to produce D2 deformation structures ranging from type-II to type-III superposed geometry. The granite, in general, is undeformed, save a few places where strong mylonitic foliation developed with stretching lineation on it. The D1-D2 structures of gneisses and migmatites were affected by a D3 stage- E-W trending shear zone (Palghat-Cauvery Shear zone) that dips steeply towards north. The shear zone is characterized by the development of mylonite zone with stretching lineation on foliation, shear band structures, modification of geometry and orientation of earlier folds and foliations within the shear zone and development of shear induced folds and foliations. Several anastomosing lenses of shear zones define the larger Palghat-Cauvery Shear zone. The orientation of the shear induced folds and foliations and deflections of earlier foliation and folds within the Palghat-Cauvery shear zone indicate an oblique-slip thrust-shear with north-towards-east sense of displacement. The E-W trending shear zone is further openly folded along N-S in the D4 stage of deformation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deformation" title="deformation">deformation</a>, <a href="https://publications.waset.org/abstracts/search?q=migmatites" title=" migmatites"> migmatites</a>, <a href="https://publications.waset.org/abstracts/search?q=mylonites" title=" mylonites"> mylonites</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20zones" title=" shear zones"> shear zones</a> </p> <a href="https://publications.waset.org/abstracts/79150/structural-anatomy-and-deformation-pattern-of-the-palghat-cauvery-shear-zone-in-the-central-sector-tamil-nadu-southern-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79150.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">190</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19714</span> Effect of Testing Device Calibration on Liquid Limit Assessment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20O.%20Bayram">M. O. Bayram</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20B.%20Gencdal"> H. B. Gencdal</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20O.%20Fercan"> N. O. Fercan</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Basbug"> B. Basbug</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Liquid limit, which is used as a measure of soil strength, can be detected by Casagrande and fall-cone testing methods. The two methods majorly diverge from each other in terms of operator dependency. The Casagrande method that is applied according to ASTM D4318-17 standards may give misleading results, especially if the calibration process is not performed well. To reveal the effect of calibration for drop height and amount of soil paste placement in the Casagrande cup, a series of tests were carried out by multipoint method as it is specified in the ASTM standards. The tests include the combination of 6 mm, 8 mm, 10 mm, and 12 mm drop heights and under-filled, half-filled, and full-filled Casagrande cups by kaolinite samples. It was observed that during successive tests, the drop height of the cup deteriorated; hence the device was recalibrated before and after each test to provide the accuracy of the results. Besides, the tests by under-filled and full-filled samples for higher drop heights revealed lower liquid limit values than the lower drop heights revealed. For the half-filled samples, it was clearly seen that the liquid limit values didn’t change at all as the drop height increased, and this explains the function of standard specifications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calibration" title="calibration">calibration</a>, <a href="https://publications.waset.org/abstracts/search?q=casagrande%20cup%20method" title=" casagrande cup method"> casagrande cup method</a>, <a href="https://publications.waset.org/abstracts/search?q=drop%20height" title=" drop height"> drop height</a>, <a href="https://publications.waset.org/abstracts/search?q=kaolinite" title=" kaolinite"> kaolinite</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20limit" title=" liquid limit"> liquid limit</a>, <a href="https://publications.waset.org/abstracts/search?q=placing%20form" title=" placing form"> placing form</a> </p> <a href="https://publications.waset.org/abstracts/151571/effect-of-testing-device-calibration-on-liquid-limit-assessment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151571.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19713</span> Design Charts for Strip Footing on Untreated and Cement Treated Sand Mat over Underlying Natural Soft Clay</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sharifullah%20Ahmed">Sharifullah Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarwar%20Jahan%20Md.%20Yasin"> Sarwar Jahan Md. Yasin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shallow foundations on unimproved soft natural soils can undergo a high consolidation and secondary settlement. For low and medium rise building projects on such soil condition, pile foundation may not be cost effective. In such cases an alternative to pile foundations may be shallow strip footings placed on a double layered improved soil system soil. The upper layer of this system is untreated or cement treated compacted sand and underlying layer is natural soft clay. This system will reduce the settlement to an allowable limit. The current research has been conducted with the settlement of a rigid plane-strain strip footing of 2.5 m width placed on the surface of a soil consisting of an untreated or cement treated sand layer overlying a bed of homogeneous soft clay. The settlement of the mentioned shallow foundation has been studied considering both cases with the thicknesses of the sand layer are 0.3 to 0.9 times the width of footing. The response of the clay layer is assumed as undrained for plastic loading stages and drained during consolidation stages. The response of the sand layer is drained during all loading stages. FEM analysis was done using PLAXIS 2D Version 8.0. A natural clay deposit of 15 m thickness and 18 m width has been modeled using Hardening Soil Model, Soft Soil Model, Soft Soil Creep Model, and upper improvement layer has been modeled using only Hardening Soil Model. The groundwater level is at the top level of the clay deposit that made the system fully saturated. Parametric study has been conducted to determine the effect of thickness, density, cementation of the sand mat and density, shear strength of the soft clay layer on the settlement of strip foundation under the uniformly distributed vertical load of varying value. A set of the chart has been established for designing shallow strip footing on the sand mat over thick, soft clay deposit through obtaining the particular thickness of sand mat for particular subsoil parameter to ensure no punching shear failure and no settlement beyond allowable level. Design guideline in the form of non-dimensional charts has been developed for footing pressure equivalent to medium-rise residential or commercial building foundation with strip footing on soft inorganic Normally Consolidated (NC) soil of Bangladesh having void ratio from 1.0 to 1.45. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20charts" title="design charts">design charts</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20improvement" title=" ground improvement"> ground improvement</a>, <a href="https://publications.waset.org/abstracts/search?q=PLAXIS%202D" title=" PLAXIS 2D"> PLAXIS 2D</a>, <a href="https://publications.waset.org/abstracts/search?q=primary%20and%20secondary%20settlement" title=" primary and secondary settlement"> primary and secondary settlement</a>, <a href="https://publications.waset.org/abstracts/search?q=sand%20mat" title=" sand mat"> sand mat</a>, <a href="https://publications.waset.org/abstracts/search?q=soft%20clay" title=" soft clay"> soft clay</a> </p> <a href="https://publications.waset.org/abstracts/130462/design-charts-for-strip-footing-on-untreated-and-cement-treated-sand-mat-over-underlying-natural-soft-clay" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130462.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">123</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19712</span> Effect of Mineral Additives on Improving the Geotechnical Properties of Soils in Chief</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rabah%20Younes">Rabah Younes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The reduction of available land resources and the increased cout associated with the use of high quality materials have led to the need for local soils to be used in geotechnical construction, however; poor engineering properties of these soils pose difficulties for constructions project and need to be stabilized to improve their properties in other works unsuitable soils with low bearing capacity , high plasticity coupled with high instability are frequently encountered hence, there is a need to improve the physical and mechanical characteristics of these soils to make theme more suitable for construction this can be done by using different mechanical and chemical methods clayey soil stabilization has been practiced for sometime but mixing additives, such us cement, lime and fly ash to the soil to increase its strength. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=clay" title="clay">clay</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20stabilization" title=" soil stabilization"> soil stabilization</a>, <a href="https://publications.waset.org/abstracts/search?q=naturaln%20pozzolana" title=" naturaln pozzolana"> naturaln pozzolana</a>, <a href="https://publications.waset.org/abstracts/search?q=atterberg%20limits" title=" atterberg limits"> atterberg limits</a>, <a href="https://publications.waset.org/abstracts/search?q=compaction" title=" compaction"> compaction</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength%20shear%20strength" title="compressive strength shear strength">compressive strength shear strength</a>, <a href="https://publications.waset.org/abstracts/search?q=curing" title=" curing"> curing</a> </p> <a href="https://publications.waset.org/abstracts/28009/effect-of-mineral-additives-on-improving-the-geotechnical-properties-of-soils-in-chief" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28009.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">313</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19711</span> Direct Bonded Aluminum to Alumina Using a Transient Eutectic Liquid Phase for Power Electronics Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yu-Ting%20Wang">Yu-Ting Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yun-Hsiang%20Cheng"> Yun-Hsiang Cheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Chien-Cheng%20Lin"> Chien-Cheng Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Kun-Lin%20Lin"> Kun-Lin Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Using a transient liquid phase method, Al was successfully bonded with Al₂O₃, which deposited Ni, Cu, Ge, and Si at the surface of the Al₂O₃ substrate after annealing at the relatively low melting point of Al. No reaction interlayer existed at the interface of any Al/Al₂O₃ specimens. Al−Fe intermetallic compounds, such as Al₉Fe₂ and Al₃Fe, formed in the Al substrate because of the precipitation of Fe, which was an impurity of the Al foil, and the reaction with Al at the grain boundaries of Al during annealing processing. According to the evaluation results of mechanical and thermal properties, the Al/Al₂O₃ specimen deposited on the Ni film possessed the highest shear strength, thermal conductivity, and bonding area percentage, followed by the Cu, Ge, and Si films. The properties of the Al/Al₂O₃ specimens deposited with Ge and Si were relatively unsatisfactory, which could be because the deposited amorphous layers easily formed oxide, resulting in inferior adhesion between Al and Al₂O₃. Therefore, the optimal choice for use in high-power devices is Al/Al₂O₃, with the deposition of Ni film. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=direct-bonded%20aluminum" title="direct-bonded aluminum">direct-bonded aluminum</a>, <a href="https://publications.waset.org/abstracts/search?q=transient%20liquid%20phase" title=" transient liquid phase"> transient liquid phase</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructures" title=" microstructures"> microstructures</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20strength" title=" shear strength"> shear strength</a> </p> <a href="https://publications.waset.org/abstracts/116949/direct-bonded-aluminum-to-alumina-using-a-transient-eutectic-liquid-phase-for-power-electronics-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/116949.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">157</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19710</span> Shear Buckling of a Large Pultruded Composite I-Section under Asymmetric Loading</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jin%20Y.%20Park">Jin Y. Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeong%20Wan%20Lee"> Jeong Wan Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An experimental and analytical research on shear buckling of a comparably large polymer composite I-section is presented. It is known that shear buckling load of a large span composite beam is difficult to determine experimentally. In order to sensitively detect shear buckling of the tested I-section, twenty strain rosettes and eight displacement sensors were applied and attached on the web and flange surfaces. The tested specimen was a pultruded composite beam made of vinylester resin, E-glass, carbon fibers and micro-fillers. Various coupon tests were performed before the shear buckling test to obtain fundamental material properties of the I-section. An asymmetric four-point bending loading scheme was utilized for the shear test. The loading scheme resulted a high shear and almost zeros moment condition at the center of the web panel. The shear buckling load was successfully determined after analyzing the obtained test data from strain rosettes and displacement sensors. An analytical approach was also performed to verify the experimental results and to support the discussed experimental program. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=strain%20sensor" title="strain sensor">strain sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=displacement%20sensor" title=" displacement sensor"> displacement sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20buckling" title=" shear buckling"> shear buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20composite%20I-section" title=" polymer composite I-section"> polymer composite I-section</a>, <a href="https://publications.waset.org/abstracts/search?q=asymmetric%20loading" title=" asymmetric loading"> asymmetric loading</a> </p> <a href="https://publications.waset.org/abstracts/23154/shear-buckling-of-a-large-pultruded-composite-i-section-under-asymmetric-loading" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23154.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">452</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19709</span> Investigation on the stability of rock slopes subjected to tension cracks via limit analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Weigao.%20Wu">Weigao. Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Stefano.%20Utili"> Stefano. Utili</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Based on the kinematic approach of limit analysis, a full set of upper bound solutions for the stability of homogeneous rock slopes subjected to tension cracks are obtained. The generalized Hoek-Brown failure criterion is employed to describe the non-linear strength envelope of rocks. In this paper, critical failure mechanisms are determined for cracks of known depth but unspecified location, cracks of known location but unknown depth, and cracks of unspecified location and depth. It is shown that there is a nearly up to 50% drop in terms of the stability factors for the rock slopes intersected by a tension crack compared with intact ones. Tables and charts of solutions in dimensionless forms are presented for ease of use by practitioners. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hoek-Brown%20failure%20criterion" title="Hoek-Brown failure criterion">Hoek-Brown failure criterion</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20analysis" title=" limit analysis"> limit analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=rock%20slope" title=" rock slope"> rock slope</a>, <a href="https://publications.waset.org/abstracts/search?q=tension%20cracks" title=" tension cracks"> tension cracks</a> </p> <a href="https://publications.waset.org/abstracts/9352/investigation-on-the-stability-of-rock-slopes-subjected-to-tension-cracks-via-limit-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9352.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">344</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19708</span> Non-Linear Behavior of Granular Materials in Pavement Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Tichamakdj">Mounir Tichamakdj</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Sandjak"> Khaled Sandjak</a>, <a href="https://publications.waset.org/abstracts/search?q=Boualem%20Tiliouine"> Boualem Tiliouine </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The design of flexible pavements is currently carried out using a multilayer elastic theory. However, for thin-surface pavements subject to light or medium traffic volumes, the importance of the non-linear stress-strain behavior of unbound granular materials requires the use of more sophisticated numerical models for the structural design of these pavements. The simplified analysis of the nonlinear behavior of granular materials in pavement design will be developed in this study. To achieve this objective, an equivalent linear model derived from a volumetric shear stress model is used to simulate the nonlinear elastic behavior of two unlinked local granular materials often used in pavements. This model is included here to adequately incorporate material non-linearity due to stress dependence and stiffness of the granular layers in the flexible pavement analysis. The sensitivity of the pavement design criteria to the likely variations in asphalt layer thickness and the mineralogical nature of unbound granular materials commonly used in pavement structures are also evaluated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=granular%20materials" title="granular materials">granular materials</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20equivalent%20model" title=" linear equivalent model"> linear equivalent model</a>, <a href="https://publications.waset.org/abstracts/search?q=non-linear%20behavior" title=" non-linear behavior"> non-linear behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=pavement%20design" title=" pavement design"> pavement design</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20volumetric%20strain%20model" title=" shear volumetric strain model"> shear volumetric strain model</a> </p> <a href="https://publications.waset.org/abstracts/95649/non-linear-behavior-of-granular-materials-in-pavement-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95649.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">177</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19707</span> Optimal Design of Redundant Hybrid Manipulator for Minimum Singularity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arash%20Rahmani">Arash Rahmani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Ghanbari"> Ahmad Ghanbari</a>, <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Baghernezhad"> Abbas Baghernezhad</a>, <a href="https://publications.waset.org/abstracts/search?q=Babak%20Safaei"> Babak Safaei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the design of parallel manipulators, usually mean value of a dexterity measure over the workspace volume is considered as the objective function to be used in optimization algorithms. The mentioned indexes in a hybrid parallel manipulator (HPM) are quite complicated to solve thanks to infinite solutions for every point within the workspace of the redundant manipulators. In this paper, spatial isotropic design axioms are extended as a well-known method for optimum design of manipulators. An upper limit for the isotropy measure of HPM is calculated and instead of computing and minimizing isotropy measure, minimizing the obtained limit is considered. To this end, two different objective functions are suggested which are obtained from objective functions of comprising modules. Finally, by using genetic algorithm (GA), the best geometric parameters for a specific hybrid parallel robot which is composed of two modified Gough-Stewart platforms (MGSP) are achieved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hybrid%20manipulator" title="hybrid manipulator">hybrid manipulator</a>, <a href="https://publications.waset.org/abstracts/search?q=spatial%20isotropy" title=" spatial isotropy"> spatial isotropy</a>, <a href="https://publications.waset.org/abstracts/search?q=genetic%20algorithm" title=" genetic algorithm"> genetic algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=optimum%20design" title=" optimum design"> optimum design</a> </p> <a href="https://publications.waset.org/abstracts/41885/optimal-design-of-redundant-hybrid-manipulator-for-minimum-singularity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41885.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">336</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19706</span> Strength Parameters and the Rate Process Theory Applied to Compacted Fadama Soils</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samuel%20Akinlabi%20Ola">Samuel Akinlabi Ola</a>, <a href="https://publications.waset.org/abstracts/search?q=Emeka%20Segun%20Nnochiri"> Emeka Segun Nnochiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Stephen%20Kayode%20Aderomose"> Stephen Kayode Aderomose</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20Ayesemhe%20Edoh"> Paul Ayesemhe Edoh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fadama soils of Northern Nigeria are generally a problem soil for highway and geotechnical engineers. There has been no consistent conclusion on the effect of the strain rate on the shear strength of soils, thus necessitating the need to clarify this issue with various types of soil. Consolidated undrained tests with pore pressure measurements were conducted at optimum moisture content and maximum dry density using standard proctor compaction. Back pressures were applied to saturate the soil. The shear strength parameters were determined. Analyzing the results and model studies using the Rate Process Theory, functional relationships between the deviator stress and strain rate were determined and expressed mathematically as deviator stress = β0+ β1 log(strain rate) at each cell pressure where β0 and β1 are constants. Also, functional relationships between the pore pressure coefficient Āf and the time to failure were determined and expressed mathematically as pore pressure coefficient, Āf = ψ0+ѱ1log (time to failure) where ψ0 and ѱ1 are constants. For cell pressure between 69 – 310 kN/m2 (10 - 45psi) the constants found for Fadama soil in this study are ψ0=0.17 and ѱ1=0.18. The study also shows the dependence of the angle of friction (ø’) on the rate of strain as it increases from 22o to 25o for an increase in the rate of strain from 0.08%/min to 1.0%/min. Conclusively, the study also shows that within the strain rate utilized in the research, the deviator strength increased with the strain rate while the excess pore water pressure decreased with an increase in the rate of strain. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deviator%20stress" title="deviator stress">deviator stress</a>, <a href="https://publications.waset.org/abstracts/search?q=Fadama%20soils" title=" Fadama soils"> Fadama soils</a>, <a href="https://publications.waset.org/abstracts/search?q=pore%20pressure%20coefficient" title=" pore pressure coefficient"> pore pressure coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=rate%20process" title=" rate process"> rate process</a> </p> <a href="https://publications.waset.org/abstracts/171947/strength-parameters-and-the-rate-process-theory-applied-to-compacted-fadama-soils" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171947.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">74</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19705</span> Quantum Coherence Sets the Quantum Speed Limit for Mixed States</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Debasis%20Mondal">Debasis Mondal</a>, <a href="https://publications.waset.org/abstracts/search?q=Chandan%20Datta"> Chandan Datta</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20K.%20Sazim"> S. K. Sazim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Quantum coherence is a key resource like entanglement and discord in quantum information theory. Wigner- Yanase skew information, which was shown to be the quantum part of the uncertainty, has recently been projected as an observable measure of quantum coherence. On the other hand, the quantum speed limit has been established as an important notion for developing the ultra-speed quantum computer and communication channel. Here, we show that both of these quantities are related. Thus, cast coherence as a resource to control the speed of quantum communication. In this work, we address three basic and fundamental questions. There have been rigorous attempts to achieve more and tighter evolution time bounds and to generalize them for mixed states. However, we are yet to know (i) what is the ultimate limit of quantum speed? (ii) Can we measure this speed of quantum evolution in the interferometry by measuring a physically realizable quantity? Most of the bounds in the literature are either not measurable in the interference experiments or not tight enough. As a result, cannot be effectively used in the experiments on quantum metrology, quantum thermodynamics, and quantum communication and especially in Unruh effect detection et cetera, where a small fluctuation in a parameter is needed to be detected. Therefore, a search for the tightest yet experimentally realisable bound is a need of the hour. It will be much more interesting if one can relate various properties of the states or operations, such as coherence, asymmetry, dimension, quantum correlations et cetera and QSL. Although, these understandings may help us to control and manipulate the speed of communication, apart from the particular cases like the Josephson junction and multipartite scenario, there has been a little advancement in this direction. Therefore, the third question we ask: (iii) Can we relate such quantities with QSL? In this paper, we address these fundamental questions and show that quantum coherence or asymmetry plays an important role in setting the QSL. An important question in the study of quantum speed limit may be how it behaves under classical mixing and partial elimination of states. This is because this may help us to choose properly a state or evolution operator to control the speed limit. In this paper, we try to address this question and show that the product of the time bound of the evolution and the quantum part of the uncertainty in energy or quantum coherence or asymmetry of the state with respect to the evolution operator decreases under classical mixing and partial elimination of states. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=completely%20positive%20trace%20preserving%20maps" title="completely positive trace preserving maps">completely positive trace preserving maps</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20coherence" title=" quantum coherence"> quantum coherence</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20speed%20limit" title=" quantum speed limit"> quantum speed limit</a>, <a href="https://publications.waset.org/abstracts/search?q=Wigner-Yanase%20Skew%20information" title=" Wigner-Yanase Skew information "> Wigner-Yanase Skew information </a> </p> <a href="https://publications.waset.org/abstracts/40216/quantum-coherence-sets-the-quantum-speed-limit-for-mixed-states" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40216.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">353</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19704</span> A Study on the Safety Evaluation of Pier According to the Water Level Change by the Monte-Carlo Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Minho%20Kwon">Minho Kwon</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeonghee%20Lim"> Jeonghee Lim</a>, <a href="https://publications.waset.org/abstracts/search?q=Yeongseok%20Jeong"> Yeongseok Jeong</a>, <a href="https://publications.waset.org/abstracts/search?q=Donghoon%20Shin"> Donghoon Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Kiyoung%20Kim"> Kiyoung Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, global warming phenomenon has led to natural disasters caused by global environmental changes, and due to abnormal weather events, the frequency and intensity of heavy rain storm typhoons are increasing. Therefore, it is imperative to prepare for future heavy rain storms and typhoons. This study selects arbitrary target bridges and performs numerical analysis to evaluate the safety of bridge piers in the event that the water level changes. The numerical model is based on two-dimensional surface elements. Actual reinforced concrete was simulated by modeling concrete to include reinforcements, and a contact boundary model was applied between the ground and the concrete. The water level applied to the piers was considered at 18 levels between 7.5 m and 16.1 m. The elastic modulus, compressive strength, tensile strength, and yield strength of the reinforced concrete were calculated using 250 random combinations and numerical analysis was carried out for each water level. In the results of analysis, the bridge exceeded the stated limit at 15.0 m. At the maximum water level of 16.1m, the concrete’s failure rate was 35.2%, but the probability that the reinforcement would fail was 61.2%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Monte-Carlo%20method" title="Monte-Carlo method">Monte-Carlo method</a>, <a href="https://publications.waset.org/abstracts/search?q=pier" title=" pier"> pier</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20level%20change" title=" water level change"> water level change</a>, <a href="https://publications.waset.org/abstracts/search?q=limit%20state" title=" limit state"> limit state</a> </p> <a href="https://publications.waset.org/abstracts/88922/a-study-on-the-safety-evaluation-of-pier-according-to-the-water-level-change-by-the-monte-carlo-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88922.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">286</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19703</span> Design of Soil Replacement under Axial Centric Load Isolated Footing by Limit State Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emad%20A.%20M.%20Osman">Emad A. M. Osman</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20M.%20Abu-Bakr"> Ahmed M. Abu-Bakr</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Compacted granular fill under shallow foundation is one of the oldest, cheapest, and easiest techniques to improve the soil characteristics to increase the bearing capacity and decrease settlement under footing. There are three main factors affecting the design of soil replacement to gain these advantages. These factors are the type of replaced soil, characteristics, and thickness. The first two factors can be easily determined by laboratory and field control. This paper emphasizes on how to determine the thickness accurately for footing under centric axial load by limit state design method. The advantages of the method are the way of determining the thickness (independent of experience) and it takes into account the replaced and original or underneath soil characteristics and reaches the goals of replaced soils economically. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20of%20soil%20replacement" title="design of soil replacement">design of soil replacement</a>, <a href="https://publications.waset.org/abstracts/search?q=LSD%20method" title=" LSD method"> LSD method</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20replacement" title=" soil replacement"> soil replacement</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20improvement" title=" soil improvement"> soil improvement</a> </p> <a href="https://publications.waset.org/abstracts/37928/design-of-soil-replacement-under-axial-centric-load-isolated-footing-by-limit-state-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">351</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19702</span> Limited Component Evaluation of the Effect of Regular Cavities on the Sheet Metal Element of the Steel Plate Shear Wall</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyyed%20Abbas%20Mojtabavi">Seyyed Abbas Mojtabavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mojtaba%20Fatzaneh%20Moghadam"> Mojtaba Fatzaneh Moghadam</a>, <a href="https://publications.waset.org/abstracts/search?q=Masoud%20Mahdavi"> Masoud Mahdavi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Steel Metal Shear Wall is one of the most common and widely used energy dissipation systems in structures, which is used today as a damping system due to the increase in the construction of metal structures. In the present study, the shear wall of the steel plate with dimensions of 5×3 m and thickness of 0.024 m was modeled with 2 floors of total height from the base level with finite element method in Abaqus software. The loading is done as a concentrated load at the upper point of the shear wall on the second floor based on step type buckle. The mesh in the model is applied in two directions of length and width of the shear wall, equal to 0.02 and 0.033, respectively, and the mesh in the models is of sweep type. Finally, it was found that the steel plate shear wall with cavity (CSPSW) compared to the SPSW model, S (Mises), Smax (In-Plane Principal), Smax (In-Plane Principal-ABS), Smax (Min Principal) increased by 53%, 70%, 68% and 43%, respectively. The presence of cavities has led to an increase in the estimated stresses, but their presence has caused critical stresses and critical deformations created to be removed from the inner surface of the shear wall and transferred to the desired sections (regular cavities) which can be suggested as a solution in seismic design and improvement of the structure to transfer possible damage during the earthquake and storm to the desired and pre-designed location in the structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=steel%20plate%20shear%20wall" title="steel plate shear wall">steel plate shear wall</a>, <a href="https://publications.waset.org/abstracts/search?q=abacus%20software" title=" abacus software"> abacus software</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=" title=""></a>, <a href="https://publications.waset.org/abstracts/search?q=boundary%20element" title=" boundary element"> boundary element</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20structural%20improvement" title=" seismic structural improvement"> seismic structural improvement</a>, <a href="https://publications.waset.org/abstracts/search?q=von%20misses%20stress" title=" von misses stress"> von misses stress</a> </p> <a href="https://publications.waset.org/abstracts/126768/limited-component-evaluation-of-the-effect-of-regular-cavities-on-the-sheet-metal-element-of-the-steel-plate-shear-wall" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/126768.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">95</span> </span> </div> </div> <ul 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