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Experimental Facilities </a> <a href="/en/research/research-infrastructures/hydraulic-structures-experimental-facility/" title="Hydraulic Structures Experimental Facility" target="_self" class=""> Hydraulic Structures Experimental Facility </a> <a href="/en/research/research-infrastructures/wind-tunnels/" title="Wind Tunnels" target="_self" class=""> Wind Tunnels </a> </div> </div> <div class="item"> <a href="/en/research/ongoing-projects/" title="Ongoing Projects" target="_self" class=""> Ongoing Projects </a> </div> <div class="item"> <a href="/en/research/research-networks/" title="Research Networks" target="_self" class=""> Research Networks </a> </div> <div class="item"> <a href="/en/research/phd-programs/" title="PhD Programs" target="_self" class=""> PhD Programs </a> </div> <div class="item"> <a href="/en/research/publications/" title="Publications" target="_self" class="noClick hasSubmenu "> Publications </a> <div class="submenu"> <a href="/en/research/publications/papers/" title="Papers" target="_self" class=""> Papers </a> </div> </div> <div class="item"> <a href="/en/research/outputs-from-lnec-s-research-projects/" title="Outputs from LNEC's research projects" target="_self" class=""> Outputs from LNEC's research projects </a> </div> </div> <div id="conteudo"> <h1 id="tituloPagina">Shaking Tables</h1> <div id="gca-tabs"> <div id="gca-tab-list"> <a href="/en/research/research-infrastructures/shaking-tables/3d-shaking-table/" title="3D Shaking Table" id="gca-tab-list-1" class="gca-tab-list active">3D Shaking Table</a> <a href="/en/research/research-infrastructures/shaking-tables/1d-shake-table/" title="1D shake table" id="gca-tab-list-2" class="gca-tab-list">1D shake table</a> <div class="clear"></div> </div> <div class="clear"></div> <div id="gca-tab-content"> <div id="gca-tab-content-1" class="gca-tab-content active"> <table border="0" cellspacing="0" cellpadding="0" width="100%"> <tr> <td align="left"> <table width=100%><tr><td valign=top align=center><img src="/fotos/gca/udine_destaque_2138768904556dc4f58f250_11355278275b9a4230a3bcd.jpg" width="600" height="247" border="0" alt=""></td></tr><tr><td valign=top><div><br /></div><div>The Structural Dynamics Laboratory (UDinE) is part of the Earthquake Engineering and Structural Dynamics Unit, which is integrated in LNEC’s <a href="/estruturas/en/">Structures Department</a>, being equipped with the experimental infrastructures necessary for the development of R&D&I activities.<br /><br /></div><div>Additional information can be found at this laboratory's <a href="/fotos/editor2/uo_folheto/udine_ficha_pt-en_v2_revistomj.pdf">flyer</a>.<br /><h4><span style="color: rgb(255, 0, 0);">Field of expertise</span></h4><div>The main activity of UDinE consists of the characterization of the seismic behavior and vulnerability of large structures subjected to seismic actions of different intensities until imminent global collapse of structures or substructures.</div><h4><span style="color: rgb(255, 0, 0);">Testing</span></h4><div><span style="font-weight: bold;">LNEC-3D shaking table</span><br />The LNEC-3D shaking table, on which the models to be tested are placed and fixed, has the shape of a triangular prism with the following characteristics:<br /></div><div><ul><li>dimensions 6,4x5,6 m2;</li><li>maximum capacity of 40 tons;</li><li>three independent orthogonal axes;</li><li>displacements controlled actively, passively restricted rotation (torsion bars);</li><li>frequency range of 0 to 40 Hz.<br /><br /></li></ul></div><div><span style="font-weight: bold;">R&D&I experimental studies<br /></span>Seismic testing of modern and traditional construction techniques and structural typologies, or for the assisted development of strengthening and seismic rehabilitation techniques, of complete structures close to real scale (1:1,5 to 1:2) or of full-scale substructures.<br /><br /></div><div>Seismic testing for the experimental evaluation and assisted development of both passive and semi-active systems intended to mitigate seismic stresses in structures.<br /><br /><span style="font-weight: bold;">Seismic qualification studies</span><br />Dynamic testing for the seismic qualification of equipment and components used by electricity producers and distributors.</div><div><h4><span style="color: rgb(255, 0, 0);">Other services</span></h4></div><div>UDinE conducts consultancy studies to assess the seismic vulnerability of important structural systems or components (e.g., buildings and bridges) using performance-based methodologies with previously defined design objectives and performance requirements. These studies are based on the experimental characterization of the dynamic behaviour of structures, essential for the implementation of retrofitting solutions for the mitigation of seismic vulnerability for one or more of the performance objectives established.</div><div><br /></div><br /><br /></div></td></tr></table> </td> </tr> </table> </div> <div class="clear"></div> <div id="gca-tab-content-2" class="gca-tab-content"> <table border="0" cellspacing="0" cellpadding="0" width="100%"> <tr> <td align="left"> <table class='img_gca floatLeft' style='margin-right:20px; margin-bottom:15px;' align=left cellpadding=0 cellspacing=0 border=0><tr><td style='padding-right:5px'><img src="/fotos/gca/mesauniaxial01_10872281556db8d3698b2.jpg" width="246" height="246" border="0" alt=""></td></tr></table><div><span style="font-weight: bold;">1D shake table</span></div><div><span style="font-weight: bold;"><br /></span></div>The 1D shake table, built in the early 1970s, consists of a steel platform body and a hydraulic circuit. It has the possibility of being used both as a horizontal and vertical shake table, but it is necessary to rotate the position of the hydraulic actuator.<br /><div>The vertical platform is fixed to the frame of the horizontal platform, so that the same hydraulic actuator can be used. The restraining of the shake table rotations is ensured by a metal structure that supports the main frame through springs.</div><div><br /></div>Main characteristics:<br /><ul><li>Useful dimensions (mxm): 3,0x2,0 (horizontal shake table), 2,45x1,45 (vertical shake table)</li><li>Drilling (mxm): 0,5x0,5</li><li>Specimen dead weight (kN): 60</li><li>Force (kN): 250</li><li>Displacements (mm): ±100</li><li>Velocity (cm/s): 21</li><li>Frequency range from 0 up to 25Hz</li></ul>The shake table motions (horizontal and vertical) are analogically controlled by the proportional only internal loop (P) of the servo valves.<div></div><div><br /></div><div align="center"><img src="/fotos/editor2/uo_folheto/1.png" title="" alt="" /></div> </td> </tr> </table> </div> <div class="clear"></div> </div> </div> </div> <div class="clear"></div> </div> <div id="footer"> <div id="divLinhaUm"> <div id="menufooterLinhaUm"> <ul> <li> <a href="/en/contacts/" target="_self" title="Contacts " class="">Contacts </a> </li> <li> <a href="/en/news/" target="_self" title="News" class="">News</a> </li> <li> <a href="/en/links/" target="_self" title="Links" class="">Links</a> </li> <li> <a href="/en/recruitment-2/science-research-fellowships/" target="_self" title="Recruitment" class="">Recruitment</a> </li> <li> <a href="/en/organisations-based-at-lnec/" target="_self" title="Organisations based at LNEC" class="">Organisations based at LNEC</a> </li> </ul> </div> <div id="btnIntranetFooter"> <a href="#">Intranet</a> </div> <div class="clear"></div> </div> <div id="divLinhaDois"> <div id="divMoradaFooter"> <div><span class="morada">Avenida do Brasil, 101<br />1700-066 LISBOA<br />PORTUGAL</span><br /><span class="gps">N - 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