Experimental Investigation of Progressive Collapse of Prestressed Concrete Frames after the Loss of Middle Column

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Specimen ID</td><td class="align_center">DIF<sub><i>P</i></sub></td><td class="align_center">DIF<sub><i>u</i></sub></td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">S1</td><td class="align_center">1.46</td><td class="align_center">1.57</td></tr><tr><td class="align_left">S2</td><td class="align_center">1.44</td><td class="align_center">1.24</td></tr><tr><td class="align_left">S3</td><td class="align_center">1.48</td><td class="align_center">1.62</td></tr><tr><td class="align_left">S4</td><td class="align_center">1.49</td><td class="align_center">1.68</td></tr><tr><td class="align_left">S5</td><td class="align_center">1.34</td><td class="align_center">1.83</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>DIFs at different loading stages.</div>

Advances in Civil Engineering

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Table 4

Table 4: Experimental Investigation of Progressive Collapse of Prestressed Concrete Frames after the Loss of Middle Column 