A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Longitudinal stiffness Kxx</td><td class="align_center">Lateral stiffness Kyy</td><td class="align_center">Vertical stiffness Kzz</td><td class="align_center">Longitudinal bending stiffness KRy</td><td class="align_center">Lateral bending stiffness KRx</td><td class="align_center">Torsional stiffness KRz</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Stiffness (kN/m)</td><td class="align_center">4.595 × 107</td><td class="align_center">5.514 × 107</td><td class="align_center">2.144 × 108</td><td class="align_center">1.032 × 1014</td><td class="align_center">1.148 × 1014</td><td class="align_center">5.951 × 1016</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Equivalent stiffness of pile foundations.</div>

Shock and Vibration

tab1

Table 1

Table 1: A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization 