Vertical Seismic Effect on the Seismic Fragility of Large-Space Underground Structures

<table class="table-group" id="tab8"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2"> </td><td class="align_center" colspan="4">Performance levels (10<sup>−3</sup> rad)</td></tr><tr class="thead"><td class="align_center">FO</td><td class="align_center">OP</td><td class="align_center">LS</td><td class="align_center">NC</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Thresholds<sub>(H+V)</sub></td><td class="align_center">1.5</td><td class="align_center">2.2</td><td class="align_center">5.8</td><td class="align_center">8.6</td></tr><tr><td class="align_left">Thresholds<sub>(H)</sub></td><td class="align_center">1.5</td><td class="align_center">2.2</td><td class="align_center">7.9</td><td class="align_center">12.8</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Thresholds of performance levels.</div>

Advances in Civil Engineering

tab8

Table 8

Table 8: Vertical Seismic Effect on the Seismic Fragility of Large-Space Underground Structures 