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reaction modulus</title> <meta name="description" content="Search results for: shear reaction modulus"> <meta name="keywords" content="shear reaction modulus"> <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 Excellence" /> </a> <button class="d-block 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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="shear reaction modulus"> <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> 4283</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: shear reaction modulus</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4283</span> An Atomic Finite Element Model for Mechanical Properties of Graphene Sheets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Win-Jin%20Chang">Win-Jin Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Haw-Long%20Lee"> Haw-Long Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Ching%20Yang"> Yu-Ching Yang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, we use the atomic-scale finite element method to investigate the mechanical behavior of the armchair- and zigzag-structured nanoporous graphene sheets with the clamped-free-free-free boundary condition under tension and shear loadings. The effect of porosity on Young鈥檚 modulus and shear modulus of nanoporous graphene sheets is obvious. For the armchair- and zigzag-structured nanoporous graphene sheets, Young鈥檚 modulus and shear modulus decreases with increasing porosity. Young鈥檚 modulus and shear modulus of zigzag graphene are larger than that of armchair one for the same porosity. The results are useful for application in the design of nanoporous graphene sheets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=graphene" title="graphene">graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoporous" title=" nanoporous"> nanoporous</a>, <a href="https://publications.waset.org/abstracts/search?q=Young%27s%20modulus" title=" Young's modulus"> Young's modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a> </p> <a href="https://publications.waset.org/abstracts/65038/an-atomic-finite-element-model-for-mechanical-properties-of-graphene-sheets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65038.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">397</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">4282</span> Study on the Impact of Size and Position of the Shear Field in Determining the Shear Modulus of Glulam Beam Using Photogrammetry Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Niaz%20Gharavi">Niaz Gharavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hexin%20Zhang"> Hexin Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The shear modulus of a timber beam can be determined using torsion test or shear field test method. The shear field test method is based on shear distortion measurement of the beam at the zone with the constant transverse load in the standardized four-point bending test. The current code of practice advises using two metallic arms act as an instrument to measure the diagonal displacement of the constructing square. The size and the position of the constructing square might influence the shear modulus determination. This study aimed to investigate the size and the position effect of the square in the shear field test method. A binocular stereo vision system has been employed to determine the 3D displacement of a grid of target points. Six glue laminated beams were produced and tested. Analysis of Variance (ANOVA) was performed on the acquired data to evaluate the significance of the size effect and the position effect of the square. The results have shown that the size of the square has a noticeable influence on the value of shear modulus, while, the position of the square within the area with the constant shear force does not affect the measured mean shear modulus. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shear%20field%20test%20method" title="shear field test method">shear field test method</a>, <a href="https://publications.waset.org/abstracts/search?q=structural-sized%20test" title=" structural-sized test"> structural-sized test</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus%20of%20Glulam%20beam" title=" shear modulus of Glulam beam"> shear modulus of Glulam beam</a>, <a href="https://publications.waset.org/abstracts/search?q=photogrammetry%20approach" title=" photogrammetry approach"> photogrammetry approach</a> </p> <a href="https://publications.waset.org/abstracts/90264/study-on-the-impact-of-size-and-position-of-the-shear-field-in-determining-the-shear-modulus-of-glulam-beam-using-photogrammetry-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90264.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">291</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">4281</span> Determination of Small Shear Modulus of Clayey Sand Using Bender Element Test</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Sadeghzadegan">R. Sadeghzadegan</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Naeini"> S. A. Naeini</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Mirzaii"> A. Mirzaii</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this article, the results of a series of carefully conducted laboratory test program were represented to determine the small strain shear modulus of sand mixed with a range of kaolinite including zero to 30%. This was experimentally achieved using a triaxial cell equipped with bender element. Results indicate that small shear modulus tends to increase, while clay content decreases and effective confining pressure increases. The exponent of stress in the power model regression analysis was not sensitive to the amount of clay content for all sand clay mixtures, while coefficient A was directly affected by change in clay content. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=small%20shear%20modulus" title="small shear modulus">small shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=bender%20element%20test" title=" bender element test"> bender element test</a>, <a href="https://publications.waset.org/abstracts/search?q=plastic%20fines" title=" plastic fines"> plastic fines</a>, <a href="https://publications.waset.org/abstracts/search?q=sand" title=" sand"> sand</a> </p> <a href="https://publications.waset.org/abstracts/78616/determination-of-small-shear-modulus-of-clayey-sand-using-bender-element-test" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78616.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">470</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">4280</span> Numerical Modeling Analysis for the Double-Layered Asphalt Pavement Structure Behavior with Interface Bonding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Minh%20Tu%20Le">Minh Tu Le</a>, <a href="https://publications.waset.org/abstracts/search?q=Quang%20Huy%20Nguyen"> Quang Huy Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mai%20Lan%20Nguyen"> Mai Lan Nguyen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bonding characteristics between pavement layers have an important influence on responses of pavement structures. This paper deals with analytical solution for the stresses, strains, and deflections of double-layered asphalt pavement structure. This solution is based on the homogeneous half-space of layered theory developed by Burmister (1943). The partial interaction between the layers is taken into account by considering an interface bonding behavior which is obtained by push-out shear test. Numerical applications considering three cases of bonding (unbonded, partially bonded, and fully bonded overlays) are carried out to the influence of the interface bonding on the structural behavior of asphalt pavement under static loading. Further, it was observed that numerical results indicate that the horizontal shear reaction modulus at the interface (Ks) will significantly affect pavement structure behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=analytical%20solution" title="analytical solution">analytical solution</a>, <a href="https://publications.waset.org/abstracts/search?q=interface%20bonding" title=" interface bonding"> interface bonding</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20test%20keyword" title=" shear test keyword"> shear test keyword</a>, <a href="https://publications.waset.org/abstracts/search?q=double-layered%20asphalt" title=" double-layered asphalt"> double-layered asphalt</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus" title=" shear reaction modulus"> shear reaction modulus</a> </p> <a href="https://publications.waset.org/abstracts/83012/numerical-modeling-analysis-for-the-double-layered-asphalt-pavement-structure-behavior-with-interface-bonding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83012.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">230</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">4279</span> Investigation of Extreme Gradient Boosting Model Prediction of Soil Strain-Shear Modulus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ehsan%20Mehryaar">Ehsan Mehryaar</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Bushehri"> Reza Bushehri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the principal parameters defining the clay soil dynamic response is the strain-shear modulus relation. Predicting the strain and, subsequently, shear modulus reduction of the soil is essential for performance analysis of structures exposed to earthquake and dynamic loadings. Many soil properties affect soil鈥檚 dynamic behavior. In order to capture those effects, in this study, a database containing 1193 data points consists of maximum shear modulus, strain, moisture content, initial void ratio, plastic limit, liquid limit, initial confining pressure resulting from dynamic laboratory testing of 21 clays is collected for predicting the shear modulus vs. strain curve of soil. A model based on an extreme gradient boosting technique is proposed. A tree-structured parzan estimator hyper-parameter tuning algorithm is utilized simultaneously to find the best hyper-parameters for the model. The performance of the model is compared to the existing empirical equations using the coefficient of correlation and root mean square error. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=XGBoost" title="XGBoost">XGBoost</a>, <a href="https://publications.waset.org/abstracts/search?q=hyper-parameter%20tuning" title=" hyper-parameter tuning"> hyper-parameter tuning</a>, <a href="https://publications.waset.org/abstracts/search?q=soil%20shear%20modulus" title=" soil shear modulus"> soil shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20response" title=" dynamic response"> dynamic response</a> </p> <a href="https://publications.waset.org/abstracts/141477/investigation-of-extreme-gradient-boosting-model-prediction-of-soil-strain-shear-modulus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141477.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">201</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">4278</span> Achieving Shear Wave Elastography by a Three-element Probe for Wearable Human-machine Interface</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jipeng%20Yan">Jipeng Yan</a>, <a href="https://publications.waset.org/abstracts/search?q=Xingchen%20Yang"> Xingchen Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaowei%20Zhou"> Xiaowei Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Mengxing%20Tang"> Mengxing Tang</a>, <a href="https://publications.waset.org/abstracts/search?q=Honghai%20Liu"> Honghai Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shear elastic modulus of skeletal muscles can be obtained by shear wave elastography (SWE) and has been linearly related to muscle force. However, SWE is currently implemented using array probes. Price and volumes of these probes and their driving equipment prevent SWE from being used in wearable human-machine interfaces (HMI). Moreover, beamforming processing for array probes reduces the real-time performance. To achieve SWE by wearable HMIs, a customized three-element probe is adopted in this work, with one element for acoustic radiation force generation and the others for shear wave tracking. In-phase quadrature demodulation and 2D autocorrelation are adopted to estimate velocities of tissues on the sound beams of the latter two elements. Shear wave speeds are calculated by phase shift between the tissue velocities. Three agar phantoms with different elasticities were made by changing the weights of agar. Values of the shear elastic modulus of the phantoms were measured as 8.98, 23.06 and 36.74 kPa at a depth of 7.5 mm respectively. This work verifies the feasibility of measuring shear elastic modulus by wearable devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shear%20elastic%20modulus" title="shear elastic modulus">shear elastic modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=skeletal%20muscle" title=" skeletal muscle"> skeletal muscle</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a>, <a href="https://publications.waset.org/abstracts/search?q=wearable%20human-machine%20interface" title=" wearable human-machine interface"> wearable human-machine interface</a> </p> <a href="https://publications.waset.org/abstracts/127469/achieving-shear-wave-elastography-by-a-three-element-probe-for-wearable-human-machine-interface" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/127469.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">161</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">4277</span> A Study on Shear Field Test Method in Timber Shear Modulus Determination Using Stereo Vision System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Niaz%20Gharavi">Niaz Gharavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hexin%20Zhang"> Hexin Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the structural timber design, the shear modulus of the timber beam is an important factor that needs to be determined accurately. According to BS EN 408, shear modulus can be determined using torsion test or shear field test method. Although torsion test creates pure shear status in the beam, it does not represent the real-life situation when the beam is in the service. On the other hand, shear field test method creates similar loading situation as in reality. The latter method is based on shear distortion measurement of the beam at the zone with the constant transverse load in the standardized four-point bending test as indicated in BS EN 408. Current testing practice code advised using two metallic arms act as an instrument to measure the diagonal displacement of the constructing square. Timber is not a homogenous material, but a heterogeneous and this characteristic makes timber to undergo a non-uniform deformation. Therefore, the dimensions and the location of the constructing square in the area with the constant transverse force might alter the shear modulus determination. This study aimed to investigate the impact of the shape, size, and location of the square in the shear field test method. A binocular stereo vision system was developed to capture the 3D displacement of a grid of target points. This approach is an accurate and non-contact method to extract the 3D coordination of targeted object using two cameras. Two group of three glue laminated beams were produced and tested by the mean of four-point bending test according to BS EN 408. Group one constructed using two materials, laminated bamboo lumber and structurally graded C24 timber and group two consisted only structurally graded C24 timber. Analysis of Variance (ANOVA) was performed on the acquired data to evaluate the significance of size and location of the square in the determination of shear modulus of the beam. The results have shown that the size of the square is an affecting factor in shear modulus determination. However, the location of the square in the area with the constant shear force does not affect the shear modulus. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shear%20field%20test%20method" title="shear field test method">shear field test method</a>, <a href="https://publications.waset.org/abstracts/search?q=BS%20EN%20408" title=" BS EN 408"> BS EN 408</a>, <a href="https://publications.waset.org/abstracts/search?q=timber%20shear%20modulus" title=" timber shear modulus"> timber shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=photogrammetry%20approach" title=" photogrammetry approach "> photogrammetry approach </a> </p> <a href="https://publications.waset.org/abstracts/85208/a-study-on-shear-field-test-method-in-timber-shear-modulus-determination-using-stereo-vision-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85208.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">212</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">4276</span> The Evaluation of Shear Modulus (Go) Consistency State of Consolidation Cohesive Soils and Seismic Reflection Survey Using Degree of Soil Consolidation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Halim%20Abdul">Abdul Halim Abdul</a>, <a href="https://publications.waset.org/abstracts/search?q=Wan%20Ismail%20Wan%20Yusoff"> Wan Ismail Wan Yusoff</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The geological formation at Limau Manis Besar area, are consist of low grade metamorphic rock and undulating mountaineers, rugged terrain and the quite steeply 45 degree slope gradient. The objectives of this paper are present the methods and devices used in measurement of P-wave velocity to estimate the initial Shear Modulus (Go) in steady state and critical state soil consolidation. The relationship between SPT-N values and the Shear Modulus (Go) at very small strain is widely considered to be evaluated. Based on the seismic reflection survey, the constant (K) poroelastic theory, mean effectives stress and primer wave velocity (Vs) increase as the soil depth increase. The steady state and critical state, Degree of Soil Consolidation(U) concept is used to interpret the behavior of Shear Modulus (Go). The relationship between Consolidation Test and Seismic Reflection Survey is also discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=geological%20setting" title="geological setting">geological setting</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=poroelastic%20theory" title=" poroelastic theory"> poroelastic theory</a>, <a href="https://publications.waset.org/abstracts/search?q=steady%20state%20and%20none%20steady%20state%20degree%20of%20soil%20consolidation" title=" steady state and none steady state degree of soil consolidation"> steady state and none steady state degree of soil consolidation</a>, <a href="https://publications.waset.org/abstracts/search?q=consolidation%20test" title=" consolidation test"> consolidation test</a> </p> <a href="https://publications.waset.org/abstracts/11415/the-evaluation-of-shear-modulus-go-consistency-state-of-consolidation-cohesive-soils-and-seismic-reflection-survey-using-degree-of-soil-consolidation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11415.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">474</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">4275</span> Determination of Elastic Constants for Scots Pine Grown in Turkey Using Ultrasound</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ergun%20Guntekin">Ergun Guntekin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigated elastic constants of scots pine (Pinus sylvestris L.) grown in Turkey by means of ultrasonic waves. Three Young鈥檚 modulus, three shear modulus and six Poisson ratios were determined at constant moisture content (12 %). Three longitudinal and six shear wave velocities propagating along the principal axes of anisotropy, and additionally, three quasi-shear wave velocities at 45掳 with respect to the principal axes of anisotropy were measured using EPOCH 650 ultrasonic flaw detector. The measured average longitudinal wave velocities for the sapwood in L, R, T directions were 4795, 1713 and 1117 m/s, respectively. The measured average shear wave velocities ranged from 682 to 1382 m/s. The measured quasi-shear wave velocities varied between 642 and 1280 m/s. The calculated average modulus of elasticity values for the sapwood in L, R, T directions were 11913, 1565 and 663 N/mm2, respectively. The calculated shear modulus in LR, LT and RT planes were 1031, 541, 415 N/mm2. Comparing with available literature, the predicted elastic constants are acceptable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elastic%20constants" title="elastic constants">elastic constants</a>, <a href="https://publications.waset.org/abstracts/search?q=prediction" title=" prediction"> prediction</a>, <a href="https://publications.waset.org/abstracts/search?q=Scots%20pine" title=" Scots pine"> Scots pine</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/50083/determination-of-elastic-constants-for-scots-pine-grown-in-turkey-using-ultrasound" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50083.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">4274</span> Effect of Density on the Shear Modulus and Damping Ratio of Saturated Sand in Small Strain</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Kakavand">M. Kakavand</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Naeini"> S. A. Naeini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dynamic properties of soil in small strains, especially for geotechnical engineers, are important for describing the behavior of soil and estimation of the earth structure deformations and structures, especially significant structures. This paper presents the effect of density on the shear modulus and damping ratio of saturated clean sand at various isotropic confining pressures. For this purpose, the specimens were compared with two different relative densities, loose Dr = 30% and dense Dr = 70%. Dynamic parameters were attained from a series of consolidated undrained fixed – free type torsional resonant column tests in small strain. Sand No. 161 is selected for this paper. The experiments show that by increasing sand density and confining pressure, the shear modulus increases and the damping ratio decreases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamic%20properties" title="dynamic properties">dynamic properties</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=damping%20ratio" title=" damping ratio"> damping ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=clean%20sand" title=" clean sand"> clean sand</a>, <a href="https://publications.waset.org/abstracts/search?q=density" title=" density"> density</a>, <a href="https://publications.waset.org/abstracts/search?q=confining%20pressure" title=" confining pressure"> confining pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=resonant%20column%2Ftorsional%20simple%20shear" title=" resonant column/torsional simple shear"> resonant column/torsional simple shear</a>, <a href="https://publications.waset.org/abstracts/search?q=TSS" title=" TSS"> TSS</a> </p> <a href="https://publications.waset.org/abstracts/111345/effect-of-density-on-the-shear-modulus-and-damping-ratio-of-saturated-sand-in-small-strain" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111345.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">122</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">4273</span> Effect of Rolling Shear Modulus and Geometric Make up on the Out-Of-Plane Bending Performance of Cross-Laminated Timber Panel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md%20Tanvir%20Rahman">Md Tanvir Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahbube%20Subhani"> Mahbube Subhani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmud%20Ashraf"> Mahmud Ashraf</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20Kremer"> Paul Kremer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cross-laminated timber (CLT) is made from layers of timber boards orthogonally oriented in the thickness direction, and due to this, CLT can withstand bi-axial bending in contrast with most other engineered wood products such as laminated veneer lumber (LVL) and glued laminated timber (GLT). Wood is cylindrically anisotropic in nature and is characterized by significantly lower elastic modulus and shear modulus in the planes perpendicular to the fibre direction, and is therefore classified as orthotropic material and is thus characterized by 9 elastic constants which are three elastic modulus in longitudinal direction, tangential direction and radial direction, three shear modulus in longitudinal tangential plane, longitudinal radial plane and radial tangential plane and three Poisson鈥檚 ratio. For simplification, timber materials are generally assumed to be transversely isotropic, reducing the number of elastic properties characterizing it to 5, where the longitudinal plane and radial planes are assumed to be planes of symmetry. The validity of this assumption was investigated through numerical modelling of CLT with both orthotropic mechanical properties and transversely isotropic material properties for three softwood species, which are Norway spruce, Douglas fir, Radiata pine, and three hardwood species, namely Victorian ash, Beech wood, and Aspen subjected to uniformly distributed loading under simply supported boundary condition. It was concluded that assuming the timber to be transversely isotropic results in a negligible error in the order of 1 percent. It was also observed that along with longitudinal elastic modulus, ratio of longitudinal shear modulus (GL) and rolling shear modulus (GR) has a significant effect on a deflection for CLT panels of lower span to depth ratio. For softwoods such as Norway spruce and Radiata pine, the ratio of longitudinal shear modulus, GL to rolling shear modulus GR is reported to be in the order of 12 to 15 times in literature. This results in shear flexibility in transverse layers leading to increased deflection under out-of-plane loading. The rolling shear modulus of hardwoods has been found to be significantly higher than those of softwoods, where the ratio between longitudinal shear modulus to rolling shear modulus as low as 4. This has resulted in a significant rise in research into the manufacturing of CLT from entirely from hardwood, as well as from a combination of softwood and hardwoods. The commonly used beam theory to analyze the performance of CLT panels under out-of-plane loads are the Shear analogy method, Gamma method, and k-method. The shear analogy method has been found to be the most effective method where shear deformation is significant. The effect of the ratio of longitudinal shear modulus and rolling shear modulus of cross-layer on the deflection of CLT under uniformly distributed load with respect to its length to depth ratio was investigated using shear analogy method. It was observed that shear deflection is reduced significantly as the ratio of the shear modulus of the longitudinal layer and rolling shear modulus of cross-layer decreases. This indicates that there is significant room for improvement of the bending performance of CLT through developing hybrid CLT from a mix of softwood and hardwood. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rolling%20shear%20modulus" title="rolling shear modulus">rolling shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20deflection" title=" shear deflection"> shear deflection</a>, <a href="https://publications.waset.org/abstracts/search?q=ratio%20of%20shear%20modulus%20and%20rolling%20shear%20modulus" title=" ratio of shear modulus and rolling shear modulus"> ratio of shear modulus and rolling shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=timber" title=" timber"> timber</a> </p> <a href="https://publications.waset.org/abstracts/116656/effect-of-rolling-shear-modulus-and-geometric-make-up-on-the-out-of-plane-bending-performance-of-cross-laminated-timber-panel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/116656.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">127</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">4272</span> Shear Modulus Degradation of a Liquefiable Sand Deposit by Shaking Table Tests </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Henry%20Munoz">Henry Munoz</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Mohsan"> Muhammad Mohsan</a>, <a href="https://publications.waset.org/abstracts/search?q=Takashi%20Kiyota"> Takashi Kiyota</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Strength and deformability characteristics of a liquefiable sand deposit including the development of earthquake-induced shear stress and shear strain as well as soil softening via the progressive degradation of shear modulus were studied via shaking table experiments. To do so, a model of a liquefiable sand deposit was constructed and densely instrumented where accelerations, pressures, and displacements at different locations were continuously monitored. Furthermore, the confinement effects on the strength and deformation characteristics of the liquefiable sand deposit due to an external surcharge by placing a heavy concrete slab (i.e. the model of an actual structural rigid pavement) on the ground surface were examined. The results indicate that as the number of seismic-loading cycles increases, the sand deposit softens progressively as large shear strains take place in different sand elements. Liquefaction state is reached after the combined effects of the progressive degradation of the initial shear modulus associated with the continuous decrease in the mean principal stress, and the buildup of the excess of pore pressure takes place in the sand deposit. Finally, the confinement effects given by a concrete slab placed on the surface of the sand deposit resulted in a favorable increasing in the initial shear modulus, an increase in the mean principal stress and a decrease in the softening rate (i.e. the decreasing rate in shear modulus) of the sand, thus making the onset of liquefaction to take place at a later stage. This is, only after the sand deposit having a concrete slab experienced a higher number of seismic loading cycles liquefaction took place, in contrast to an ordinary sand deposit having no concrete slab. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=liquefaction" title="liquefaction">liquefaction</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus%20degradation" title=" shear modulus degradation"> shear modulus degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=shaking%20table" title=" shaking table"> shaking table</a>, <a href="https://publications.waset.org/abstracts/search?q=earthquake" title=" earthquake"> earthquake</a> </p> <a href="https://publications.waset.org/abstracts/78982/shear-modulus-degradation-of-a-liquefiable-sand-deposit-by-shaking-table-tests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78982.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">387</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">4271</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鈥檚 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">4270</span> Numerical Study of Modulus of Subgrade Reaction in Eccentrically Loaded Circular Footing Resting</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=Mohammad%20Hossein%20Zade"> Mohammad Hossein Zade</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article is an attempt to present a numerically study of the behaviour of an eccentrically loaded circular footing resting on sand to determine &lrm;its ultimate bearing capacity. A surface circular footing of diameter 12 cm (D) was used as &lrm;shallow foundation. For this purpose, three dimensional models consist of foundation, and medium sandy soil was modelled by ABAQUS software. Bearing capacity of footing was evaluated and the &lrm;effects of the load eccentricity on bearing capacity, its settlement, and modulus of subgrade reaction were studied. Three different values of load eccentricity with equal space from inside the core on the core boundary and outside the core boundary, which were respectively e=0.75, 1.5, and 2.25 cm, were considered. The results show that by increasing the load eccentricity, the ultimate load and the &lrm;modulus of subgrade reaction decreased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=circular%20foundation" title="circular foundation">circular foundation</a>, <a href="https://publications.waset.org/abstracts/search?q=sand" title=" sand"> sand</a>, <a href="https://publications.waset.org/abstracts/search?q=eccentric%20loading" title=" eccentric loading"> eccentric loading</a>, <a href="https://publications.waset.org/abstracts/search?q=modulus%20of%20subgrade%20reaction" title=" modulus of subgrade reaction"> modulus of subgrade reaction</a> </p> <a href="https://publications.waset.org/abstracts/55883/numerical-study-of-modulus-of-subgrade-reaction-in-eccentrically-loaded-circular-footing-resting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55883.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">346</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">4269</span> The Elastic Field of a Nano-Pore, and the Effective Modulus of Composites with Nano-Pores</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xin%20Chen">Xin Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Moxiao%20Li"> Moxiao Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Xuechao%20Sun"> Xuechao Sun</a>, <a href="https://publications.waset.org/abstracts/search?q=Fei%20Ti"> Fei Ti</a>, <a href="https://publications.waset.org/abstracts/search?q=Shaobao%20Liu"> Shaobao Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Feng%20Xu"> Feng Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Tian%20Jian%20Lu"> Tian Jian Lu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The composite materials with pores have the characteristics of light weight, sound insulation, and heat insulation, and have broad prospects in many fields, including aerospace. In general, the stiffness of such composite is less than the stiffness of the matrix material, limiting their applications. In this paper, we establish a theoretical model to analyze the deformation mechanism of a nano-pore. The interface between the pores and matrix material is described by the Gurtin-Murdoch model. By considering scale effect related with current deformation, we estimate the effective mechanical properties (e.g., effective shear modulus and bulk modulus) of a composite with nano-pores. Due to the scale effect, the elastic field in the composite was changed and local hardening was observed around the nano-pore, and the effective shear modulus and effective bulk modulus were found to be a function of the surface energy. The effective shear modulus increase with the surface energy and decrease with the size of the nano-pores, and the effective bulk modulus decrease with the surface energy and increase with the size of the nano-pores. These results have potential applications in the nanocomposite mechanics and aerospace field. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite%20mechanics" title="composite mechanics">composite mechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=nano-inhomogeneity" title=" nano-inhomogeneity"> nano-inhomogeneity</a>, <a href="https://publications.waset.org/abstracts/search?q=nano-pores" title=" nano-pores"> nano-pores</a>, <a href="https://publications.waset.org/abstracts/search?q=scale%20effect" title=" scale effect"> scale effect</a> </p> <a href="https://publications.waset.org/abstracts/109464/the-elastic-field-of-a-nano-pore-and-the-effective-modulus-of-composites-with-nano-pores" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/109464.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">134</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">4268</span> Effects of Heat Treatment on the Elastic Constants of Cedar Wood</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tugba%20Yilmaz%20Aydin">Tugba Yilmaz Aydin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ergun%20Guntekin"> Ergun Guntekin</a>, <a href="https://publications.waset.org/abstracts/search?q=Murat%20Aydin"> Murat Aydin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effects of heat treatment on the elastic constants of cedar wood (Cedrus libani) were investigated. Specimens were exposed to heat under atmospheric pressure at four different temperatures (120, 150, 180, 210 掳C) and three different time levels (2, 5, 8 hours). Three Young鈥檚 modulus (EL, ER, ET) and six Poisson ratios (渭LR, 渭LT, 渭RL, 渭RT, 渭TL, 渭TR) were determined from compression test using bi-axial extensometer at constant moisture content (12 %). Three shear modulus were determined using ultrasound. Six shear wave velocities propagating along the principal axes of anisotropy were measured using EPOCH 650 ultrasonic flaw detector with 1 MHz transverse transducers. The properties of the samples tested were significantly affected by heat treatment by different degree. As a result, softer treatments yielded some amount of increase in Young modulus and shear modulus values, but increase of time and temperature resulted in significant decrease for both values. Poisson ratios seemed insensitive to heat treatment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cedar%20wood" title="cedar wood">cedar wood</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20constants" title=" elastic constants"> elastic constants</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20treatment" title=" heat treatment"> heat treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/50445/effects-of-heat-treatment-on-the-elastic-constants-of-cedar-wood" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50445.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">385</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">4267</span> Effect of Plastic Fines on Liquefaction Resistance of Sandy Soil Using Resonant Column Test </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Naeini">S. A. Naeini</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ghorbani%20Tochaee"> M. Ghorbani Tochaee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study is to assess the influence of plastic fines content on sand-clay mixtures on maximum shear modulus and liquefaction resistance using a series of resonant column tests. A high plasticity clay called bentonite was added to 161 Firoozkooh sand at the percentages of 10, 15, 20, 25, 30 and 35 by dry weight. The resonant column tests were performed on the remolded specimens at constant confining pressure of 100 KPa and then the values of G<sub>max</sub> and liquefaction resistance were investigated. The maximum shear modulus and cyclic resistance ratio (CRR) are examined in terms of fines content. Based on the results, the maximum shear modulus and liquefaction resistance tend to decrease within the increment of fine contents. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gmax" title="Gmax">Gmax</a>, <a href="https://publications.waset.org/abstracts/search?q=liquefaction" title=" liquefaction"> liquefaction</a>, <a href="https://publications.waset.org/abstracts/search?q=plastic%20fines" title=" plastic fines"> plastic fines</a>, <a href="https://publications.waset.org/abstracts/search?q=resonant%20column" title=" resonant column"> resonant column</a>, <a href="https://publications.waset.org/abstracts/search?q=sand-clay%20mixtures" title=" sand-clay mixtures"> sand-clay mixtures</a>, <a href="https://publications.waset.org/abstracts/search?q=bentonite" title=" bentonite"> bentonite</a> </p> <a href="https://publications.waset.org/abstracts/120346/effect-of-plastic-fines-on-liquefaction-resistance-of-sandy-soil-using-resonant-column-test" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/120346.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">146</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">4266</span> Evaluation of the End Effect Impact on the Torsion Test for Determining the Shear Modulus of a Timber Beam through a Photogrammetry Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Niaz%20Gharavi">Niaz Gharavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hexin%20Zhang"> Hexin Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yanjun%20Xie"> Yanjun Xie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The timber beam end effect in the torsion test is evaluated using binocular stereo vision system. It is recommended by BS EN 408:2010+A1:2012 to exclude a distance of two to three times of cross-sectional thickness (b) from ends to avoid the end effect; whereas, this study indicates that this distance is not sufficiently far enough to remove this effect in slender cross-sections. The shear modulus of six timber beams with different aspect ratios is determined at the various angles and cross-sections. The result of this experiment shows that the end affected span of each specimen varies depending on their aspect ratios. It is concluded that by increasing the aspect ratio this span will increase. However, by increasing the distance from the ends to the values greater than 6b, the shear modulus trend becomes constant and end effect will be negligible. Moreover, it is concluded that end affected span is preferred to be depth-dependent rather than thickness-dependant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=end%20clamp%20effect" title="end clamp effect">end clamp effect</a>, <a href="https://publications.waset.org/abstracts/search?q=full-size%20timber%20test" title=" full-size timber test"> full-size timber test</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20properties" title=" shear properties"> shear properties</a>, <a href="https://publications.waset.org/abstracts/search?q=torsion%20test" title=" torsion test"> torsion test</a>, <a href="https://publications.waset.org/abstracts/search?q=wood%20engineering" title=" wood engineering"> wood engineering</a> </p> <a href="https://publications.waset.org/abstracts/55394/evaluation-of-the-end-effect-impact-on-the-torsion-test-for-determining-the-shear-modulus-of-a-timber-beam-through-a-photogrammetry-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55394.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">282</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">4265</span> Evaluation of Static Modulus of Elasticity Depending on Concrete Compressive Strength</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Klara%20Krizova">Klara Krizova</a>, <a href="https://publications.waset.org/abstracts/search?q=Rudolf%20Hela"> Rudolf Hela</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper is focused on monitoring of dependencies of different composition concretes on elastic modulus values. To obtain a summary of elastic modulus development independence of concrete composition design variability was the objective of the experiment. Essential part of this work was initiated as a reaction to building practice when questions of elastic moduli arose at the same time and which mostly did not obtain the required and expected values from concrete constructions. With growing interest in this theme the elastic modulus questions have been developing further. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=concrete" title="concrete">concrete</a>, <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=modulus%20%0D%0Aof%20elasticity" title=" modulus of elasticity"> modulus of elasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=EuroCode%202" title=" EuroCode 2"> EuroCode 2</a> </p> <a href="https://publications.waset.org/abstracts/30167/evaluation-of-static-modulus-of-elasticity-depending-on-concrete-compressive-strength" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30167.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">455</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">4264</span> Dynamic Properties of Recycled Concrete Aggregate from Resonant Column Tests</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wojciech%20Sas">Wojciech Sas</a>, <a href="https://publications.waset.org/abstracts/search?q=Emil%20Sob%C3%B3l"> Emil Sob贸l</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarzyna%20Gabry%C5%9B"> Katarzyna Gabry艣</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrzej%20G%C5%82uchowski"> Andrzej G艂uchowski</a>, <a href="https://publications.waset.org/abstracts/search?q=Alojzy%20Szyma%C5%84ski"> Alojzy Szyma艅ski</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Depleting of natural resources is forcing the man to look for alternative construction materials. One of them is recycled concrete aggregates (RCA). RCA from the demolition of buildings and crushed to proper gradation can be a very good replacement for natural unbound granular aggregates, gravels or sands. Physical and the mechanical properties of RCA are well known in the field of basic civil engineering applications, but to proper roads and railways design dynamic characteristic is need as well. To know maximum shear modulus (GMAX) and the minimum damping ratio (DMIN) of the RCA dynamic loads in resonant column apparatus need to be performed. The paper will contain literature revive about alternative construction materials and dynamic laboratory research technique. The article will focus on dynamic properties of RCA, but early studies conducted by the authors on physical and mechanical properties of this material also will be presented. The authors will show maximum shear modulus and minimum damping ratio. Shear modulus and damping ratio degradation curves will be shown as well. From exhibited results conclusion will be drawn at the end of the article. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=recycled%20concrete%20aggregate" title="recycled concrete aggregate">recycled concrete aggregate</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=damping%20ratio" title=" damping ratio"> damping ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=resonant%20column" title=" resonant column"> resonant column</a> </p> <a href="https://publications.waset.org/abstracts/37157/dynamic-properties-of-recycled-concrete-aggregate-from-resonant-column-tests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37157.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">399</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">4263</span> Determination of Poisson鈥檚 Ratio and Elastic Modulus of Compression Textile Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chongyang%20Ye">Chongyang Ye</a>, <a href="https://publications.waset.org/abstracts/search?q=Rong%20Liu"> Rong Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Compression textiles such as compression stockings (CSs) have been extensively applied for the prevention and treatment of chronic venous insufficiency of lower extremities. The involvement of multiple mechanical factors such as interface pressure, frictional force, and elastic materials make the interactions between lower limb and CSs to be complex. Determination of Poisson鈥檚 ratio and elastic moduli of CS materials are critical for constructing finite element (FE) modeling to numerically simulate a complex interactive system of CS and lower limb. In this study, a mixed approach, including an analytic model based on the orthotropic Hooke鈥檚 Law and experimental study (uniaxial tension testing and pure shear testing), has been proposed to determine Young鈥檚 modulus, Poisson鈥檚 ratio, and shear modulus of CS fabrics. The results indicated a linear relationship existing between the stress and strain properties of the studied CS samples under controlled stretch ratios (< 100%). The newly proposed method and the determined key mechanical properties of elastic orthotropic CS fabrics facilitate FE modeling for analyzing in-depth the effects of compression material design on their resultant biomechanical function in compression therapy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elastic%20compression%20stockings" title="elastic compression stockings">elastic compression stockings</a>, <a href="https://publications.waset.org/abstracts/search?q=Young%E2%80%99s%20modulus" title=" Young鈥檚 modulus"> Young鈥檚 modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=Poisson%E2%80%99s%20ratio" title=" Poisson鈥檚 ratio"> Poisson鈥檚 ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20analysis" title=" mechanical analysis"> mechanical analysis</a> </p> <a href="https://publications.waset.org/abstracts/152509/determination-of-poissons-ratio-and-elastic-modulus-of-compression-textile-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152509.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">119</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">4262</span> Modeling of Foundation-Soil Interaction Problem by Using Reduced Soil Shear Modulus </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yesim%20Tumsek">Yesim Tumsek</a>, <a href="https://publications.waset.org/abstracts/search?q=Erkan%20Celebi"> Erkan Celebi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to simulate the infinite soil medium for soil-foundation interaction problem, the essential geotechnical parameter on which the foundation stiffness depends, is the value of soil shear modulus. This parameter directly affects the site and structural response of the considered model under earthquake ground motions. Strain-dependent shear modulus under cycling loads makes difficult to estimate the accurate value in computation of foundation stiffness for the successful dynamic soil-structure interaction analysis. The aim of this study is to discuss in detail how to use the appropriate value of soil shear modulus in the computational analyses and to evaluate the effect of the variation in shear modulus with strain on the impedance functions used in the sub-structure method for idealizing the soil-foundation interaction problem. Herein, the impedance functions compose of springs and dashpots to represent the frequency-dependent stiffness and damping characteristics at the soil-foundation interface. Earthquake-induced vibration energy is dissipated into soil by both radiation and hysteretic damping. Therefore, flexible-base system damping, as well as the variability in shear strengths, should be considered in the calculation of impedance functions for achievement a more realistic dynamic soil-foundation interaction model. In this study, it has been written a Matlab code for addressing these purposes. The case-study example chosen for the analysis is considered as a 4-story reinforced concrete building structure located in Istanbul consisting of shear walls and moment resisting frames with a total height of 12m from the basement level. The foundation system composes of two different sized strip footings on clayey soil with different plasticity (Herein, PI=13 and 16). In the first stage of this study, the shear modulus reduction factor was not considered in the MATLAB algorithm. The static stiffness, dynamic stiffness modifiers and embedment correction factors of two rigid rectangular foundations measuring 2m wide by 17m long below the moment frames and 7m wide by 17m long below the shear walls are obtained for translation and rocking vibrational modes. Afterwards, the dynamic impedance functions of those have been calculated for reduced shear modulus through the developed Matlab code. The embedment effect of the foundation is also considered in these analyses. It can easy to see from the analysis results that the strain induced in soil will depend on the extent of the earthquake demand. It is clearly observed that when the strain range increases, the dynamic stiffness of the foundation medium decreases dramatically. The overall response of the structure can be affected considerably because of the degradation in soil stiffness even for a moderate earthquake. Therefore, it is very important to arrive at the corrected dynamic shear modulus for earthquake analysis including soil-structure interaction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=clay%20soil" title="clay soil">clay soil</a>, <a href="https://publications.waset.org/abstracts/search?q=impedance%20functions" title=" impedance functions"> impedance functions</a>, <a href="https://publications.waset.org/abstracts/search?q=soil-foundation%20interaction" title=" soil-foundation interaction"> soil-foundation interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=sub-structure%20approach" title=" sub-structure approach"> sub-structure approach</a>, <a href="https://publications.waset.org/abstracts/search?q=reduced%20shear%20modulus" title=" reduced shear modulus"> reduced shear modulus</a> </p> <a href="https://publications.waset.org/abstracts/76102/modeling-of-foundation-soil-interaction-problem-by-using-reduced-soil-shear-modulus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76102.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">269</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">4261</span> Quantification of Magnetic Resonance Elastography for Tissue Shear Modulus using U-Net Trained with Finite-Differential Time-Domain Simulation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiaying%20Zhang">Jiaying Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xin%20Mu"> Xin Mu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang%20Ni"> Chang Ni</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeff%20L.%20Zhang"> Jeff L. Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magnetic resonance elastography (MRE) non-invasively assesses tissue elastic properties, such as shear modulus, by measuring tissue鈥檚 displacement in response to mechanical waves. The estimated metrics on tissue elasticity or stiffness have been shown to be valuable for monitoring physiologic or pathophysiologic status of tissue, such as a tumor or fatty liver. To quantify tissue shear modulus from MRE-acquired displacements (essentially an inverse problem), multiple approaches have been proposed, including Local Frequency Estimation (LFE) and Direct Inversion (DI). However, one common problem with these methods is that the estimates are severely noise-sensitive due to either the inverse-problem nature or noise propagation in the pixel-by-pixel process. With the advent of deep learning (DL) and its promise in solving inverse problems, a few groups in the field of MRE have explored the feasibility of using DL methods for quantifying shear modulus from MRE data. Most of the groups chose to use real MRE data for DL model training and to cut training images into smaller patches, which enriches feature characteristics of training data but inevitably increases computation time and results in outcomes with patched patterns. In this study, simulated wave images generated by Finite Differential Time Domain (FDTD) simulation are used for network training, and U-Net is used to extract features from each training image without cutting it into patches. The use of simulated data for model training has the flexibility of customizing training datasets to match specific applications. The proposed method aimed to estimate tissue shear modulus from MRE data with high robustness to noise and high model-training efficiency. Specifically, a set of 3000 maps of shear modulus (with a range of 1 kPa to 15 kPa) containing randomly positioned objects were simulated, and their corresponding wave images were generated. The two types of data were fed into the training of a U-Net model as its output and input, respectively. For an independently simulated set of 1000 images, the performance of the proposed method against DI and LFE was compared by the relative errors (root mean square error or RMSE divided by averaged shear modulus) between the true shear modulus map and the estimated ones. The results showed that the estimated shear modulus by the proposed method achieved a relative error of 4.91%卤0.66%, substantially lower than 78.20%卤1.11% by LFE. Using simulated data, the proposed method significantly outperformed LFE and DI in resilience to increasing noise levels and in resolving fine changes of shear modulus. The feasibility of the proposed method was also tested on MRE data acquired from phantoms and from human calf muscles, resulting in maps of shear modulus with low noise. In future work, the method鈥檚 performance on phantom and its repeatability on human data will be tested in a more quantitative manner. In conclusion, the proposed method showed much promise in quantifying tissue shear modulus from MRE with high robustness and efficiency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deep%20learning" title="deep learning">deep learning</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20resonance%20elastography" title=" magnetic resonance elastography"> magnetic resonance elastography</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20resonance%20imaging" title=" magnetic resonance imaging"> magnetic resonance imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus%20estimation" title=" shear modulus estimation"> shear modulus estimation</a> </p> <a href="https://publications.waset.org/abstracts/175628/quantification-of-magnetic-resonance-elastography-for-tissue-shear-modulus-using-u-net-trained-with-finite-differential-time-domain-simulation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/175628.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">68</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">4260</span> Analysis of Geotechnical Parameters from Geophysical Information</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adewoyin%20O.%20Olusegun">Adewoyin O. Olusegun</a>, <a href="https://publications.waset.org/abstracts/search?q=Akinwumi%20I.%20Isaac"> Akinwumi I. Isaac</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In some part of the world where legislations related to site investigations before constructions are not strictly enforced, the expenses and time required for carrying out a comprehensive geotechnical investigation to characterize a site can discourage prospective private residential building developers. Another factor that can discourage a developer is the fact that most of the geotechnical tests procedures utilized during site investigations, to a certain extent, alter the existing environment of the site. This study suggests a quick, non-destructive and non-intrusive method of obtaining key subsoil geotechnical properties necessary for foundation design for proposed engineering facilities. Seismic wave velocities generated from near surface refraction method was used to determine the bulk density of soil, Young鈥檚 modulus, bulk modulus, shear modulus and allowable bearing capacity of a competent layer that can bear structural load at the particular study site. Also, regression equations were developed in order to directly obtain the bulk density of soil, Young鈥檚 modulus, bulk modulus, shear modulus and allowable bearing capacity from the compressional wave velocities. The results obtained correlated with the results of standard geotechnical investigations carried out. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=characterize" title="characterize">characterize</a>, <a href="https://publications.waset.org/abstracts/search?q=environment" title=" environment"> environment</a>, <a href="https://publications.waset.org/abstracts/search?q=geophysical" title=" geophysical"> geophysical</a>, <a href="https://publications.waset.org/abstracts/search?q=geotechnical" title=" geotechnical"> geotechnical</a>, <a href="https://publications.waset.org/abstracts/search?q=regression" title=" regression"> regression</a> </p> <a href="https://publications.waset.org/abstracts/37069/analysis-of-geotechnical-parameters-from-geophysical-information" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37069.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">370</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">4259</span> Stiffness and Modulus of Subgrade Reaction of the Soft Soil Improved by Stone Columns</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sudheer%20Kumar%20J.">Sudheer Kumar J.</a>, <a href="https://publications.waset.org/abstracts/search?q=Sudhanshu%20Sharma"> Sudhanshu Sharma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stone columns are extensively used as constructive and environmentally sustainable improvement methods for improving stiffness, modulus of subgrade reaction, and maximum lateral displacement in the multilayer soil system. The advantage of using stone columns in improving the single-layer soft soil as a ground reinforcement element for supporting various structures up to shallow depth is well researched, but the understanding of strengthening the multiplayer soil system for a deeper level requires further studies. In this paper, a series of cases have been conducted to study the behaviour of ordinary stone columns (OSC), geosynthetic encased stone columns (GESC) over various objectives for strengthening multilayer soil system up to deep level. A finite element analyses were carried out using the software package PLAXIS to study further correlate the results. The study aims to find the stiffness of composite soil, modulus of subgrade reaction, which is generally required for designing of various foundations, and also discusses the maximum horizontal displacement location, which is the major failure criteria seen after the installation of stone columns. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stone%20columns" title="stone columns">stone columns</a>, <a href="https://publications.waset.org/abstracts/search?q=geotextile" title=" geotextile"> geotextile</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=stiffness" title=" stiffness"> stiffness</a>, <a href="https://publications.waset.org/abstracts/search?q=modulus%20of%20subgrade%20reaction" title=" modulus of subgrade reaction"> modulus of subgrade reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=maximum%20lateral%20displacement%20point" title=" maximum lateral displacement point"> maximum lateral displacement point</a> </p> <a href="https://publications.waset.org/abstracts/137244/stiffness-and-modulus-of-subgrade-reaction-of-the-soft-soil-improved-by-stone-columns" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/137244.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">136</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">4258</span> Comparison for Some Elastic and Mechanical Properties of Plutonium Dioxide</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Guler">M. Guler</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Guler"> E. Guler</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We report some elastic parameters of cubic fluorite type neptunium dioxide (NpO2) with a recent EAM type interatomic potential through geometry optimization calculations. Typical cubic elastic constants, bulk modulus, shear modulus, young modulus and other relevant elastic parameters were also calculated during research. After calculations, we have compared our results with the available theoretical data. Our results agree well with the previous theoretical findings of the considered quantities of NpO2. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=NpO2" title="NpO2">NpO2</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20properties" title=" elastic properties"> elastic properties</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk%20modulus" title=" bulk modulus"> bulk modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a> </p> <a href="https://publications.waset.org/abstracts/35281/comparison-for-some-elastic-and-mechanical-properties-of-plutonium-dioxide" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35281.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">337</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">4257</span> Analysis of Shallow Foundation Using Conventional and Finite Element Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sultan%20Al%20Shafian">Sultan Al Shafian</a>, <a href="https://publications.waset.org/abstracts/search?q=Mozaher%20Ul%20Kabir"> Mozaher Ul Kabir</a>, <a href="https://publications.waset.org/abstracts/search?q=Khondoker%20Istiak%20Ahmad"> Khondoker Istiak Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Masnun%20Abrar"> Masnun Abrar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahfuza%20Khanum"> Mahfuza Khanum</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossain%20M.%20Shahin"> Hossain M. Shahin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For structural evaluation of shallow foundation, the modulus of subgrade reaction is one of the most widely used and accepted parameter for its ease of calculations. To determine this parameter, one of the most common field method is Plate Load test method. In this field test method, the subgrade modulus is considered for a specific location and according to its application, it is assumed that the displacement occurred in one place does not affect other adjacent locations. For this kind of assumptions, the modulus of subgrade reaction sometimes forced the engineers to overdesign the underground structure, which eventually results in increasing the cost of the construction and sometimes failure of the structure. In the present study, the settlement of a shallow foundation has been analyzed using both conventional and numerical analysis. Around 25 plate load tests were conducted on a sand fill site in Bangladesh to determine the Modulus of Subgrade reaction of ground which is later used to design a shallow foundation considering different depth. After the collection of the field data, the field condition was appropriately simulated in a finite element software. Finally results obtained from both the conventional and numerical approach has been compared. A significant difference has been observed in the case of settlement while comparing the results. A proper correlation has also been proposed at the end of this research work between the two methods of in order to provide the most efficient way to calculate the subgrade modulus of the ground for designing the shallow foundation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modulus%20of%20subgrade%20reaction" title="modulus of subgrade reaction">modulus of subgrade reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=shallow%20foundation" title=" shallow foundation"> shallow foundation</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=settlement" title=" settlement"> settlement</a>, <a href="https://publications.waset.org/abstracts/search?q=plate%20load%20test" title=" plate load test"> plate load test</a> </p> <a href="https://publications.waset.org/abstracts/95678/analysis-of-shallow-foundation-using-conventional-and-finite-element-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95678.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">181</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">4256</span> Numerical Investigation of Static and Dynamic Responses of Fiber Reinforced Sand</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sandeep%20Kumar">Sandeep Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahesh%20Kumar%20Jat"> Mahesh Kumar Jat</a>, <a href="https://publications.waset.org/abstracts/search?q=Rajib%20Sarkar"> Rajib Sarkar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Soil reinforced with randomly distributed fibers is an attractive means to improve the performance of soil in a cost effective manner. Static and dynamic characterization of fiber reinforced soil have become important to evaluate adequate performance for all classes of geotechnical engineering problems. Present study investigates the behaviour of fiber reinforced cohesionless soil through numerical simulation of triaxial specimen. The numerical model has been validated with the existing literature of laboratory triaxial compression testing. A parametric study has been done to find out optimum fiber content for shear resistance. Cyclic triaxial testing has been simulated and the stress-strain response of fiber-reinforced sand has been examined considering different combination of fiber contents. Shear modulus values and damping values of fiber-reinforced sand are evaluated. It has been observed from results that for 1.0 percent fiber content shear modulus increased 2.28 times and damping ratio decreased 4.6 times. The influence of amplitude of cyclic strain, confining pressure and frequency of loading on the dynamic properties of fiber reinforced sand has been investigated and presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damping" title="damping">damping</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20reinforced%20soil" title=" fiber reinforced soil"> fiber reinforced soil</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20modelling" title=" numerical modelling"> numerical modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20modulus" title=" shear modulus"> shear modulus</a> </p> <a href="https://publications.waset.org/abstracts/77544/numerical-investigation-of-static-and-dynamic-responses-of-fiber-reinforced-sand" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77544.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">278</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">4255</span> An Automated Bender Element System Used for S-Wave Velocity Tomography during Model Pile Installation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuxin%20Wu">Yuxin Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Shing%20Wang"> Yu-Shing Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Zitao%20Zhang"> Zitao Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A high-speed and time-lapse S-wave velocity measurement system has been built up for S-wave tomography in sand. This system is based on bender elements and applied to model pile tests in a tailor-made pressurized chamber to monitor the shear wave velocity distribution during pile installation in sand. Tactile pressure sensors are used parallel together with bender elements to monitor the stress changes during the tests. Strain gages are used to monitor the shaft resistance and toe resistance of pile. Since the shear wave velocity (Vs) is determined by the shear modulus of sand and the shaft resistance of pile is also influenced by the shear modulus of sand around the pile, the purposes of this study are to time-lapse monitor the S-wave velocity distribution change at a certain horizontal section during pile installation and to correlate the S-wave velocity distribution and shaft resistance of pile in sand. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bender%20element" title="bender element">bender element</a>, <a href="https://publications.waset.org/abstracts/search?q=pile" title=" pile"> pile</a>, <a href="https://publications.waset.org/abstracts/search?q=shaft%20resistance" title=" shaft resistance"> shaft resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20wave%20velocity" title=" shear wave velocity"> shear wave velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=tomography" title=" tomography"> tomography</a> </p> <a href="https://publications.waset.org/abstracts/59285/an-automated-bender-element-system-used-for-s-wave-velocity-tomography-during-model-pile-installation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59285.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">429</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">4254</span> Shear Reinforcement of Stone Columns During Soil Liquefaction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeineb%20Ben%20Salem">Zeineb Ben Salem</a>, <a href="https://publications.waset.org/abstracts/search?q=Wissem%20Frikha"> Wissem Frikha</a>, <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Bouassida"> Mounir Bouassida</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this paper is to assess the effectiveness of stone columns as a liquefaction countermeasure focusing on shear reinforcementbenefit. In fact, stone columns which have high shear modulus relative to the surrounding soils potentially can carry higher shear stress levels. Thus, stone columns provide shear reinforcement and decrease the Cyclic Shear Stress Ratio CSR to which the treated soils would be subjected during an earthquake. In order to quantify the level of shear stress reduction in reinforced soil, several approaches have been developed. Nevertheless, the available approaches do not take into account the improvement of the soil parameters, mainly the shear modulusdue to stone columns installation. Indeed, in situ control tests carried out before and after the installation of stone columns based upon the results of collected data derived from 24 case histories have given evidence of the improvement of the existing soil properties.In this paper, the assessment of shear reinforcement of stone columns that accounts such improvement of the soil parameters due to stone column installation is investigated. Comparative results indicate that considering the improvement effects considerably affect the assessment of shear reinforcement for liquefaction analysis of reinforced soil by stone columns. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stone%20column" title="stone column">stone column</a>, <a href="https://publications.waset.org/abstracts/search?q=liquefaction" title=" liquefaction"> liquefaction</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20reinforcement" title=" shear reinforcement"> shear reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=CSR" title=" CSR"> CSR</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/146200/shear-reinforcement-of-stone-columns-during-soil-liquefaction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146200.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">153</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=5">5</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=6">6</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=7">7</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=8">8</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=9">9</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=10">10</a></li> <li class="page-item disabled"><span class="page-link">...</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=shear%20reaction%20modulus&page=142">142</a></li> <li class="page-item"><a class="page-link" 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