Experimental Study and Direct Strength Method for Cold-Formed Steel Built-Up I-Sectional Columns under Axial Compression

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left"><i>t</i> (mm)</td><td class="align_center"><i>f</i><sub>0.2</sub> (MPa)</td><td class="align_center"><i>f</i><sub>u</sub> (MPa)</td><td class="align_center"><i>E</i> (MPa)</td><td class="align_center"><i>ε</i><sub>u</sub> (%)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">0.8</td><td class="align_center">600</td><td class="align_center">602</td><td class="align_center">2.16 × 10<sup>5</sup></td><td class="align_center">7.19</td></tr><tr><td class="align_left">1.00</td><td class="align_center">620</td><td class="align_center">634</td><td class="align_center">2.15 × 10<sup>5</sup></td><td class="align_center">8.92</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div><i>Note. t</i> is the nominal thickness.<br/></div></td></tr></table>

Mathematical Problems in Engineering

tab3

Table 3

Table 3: Experimental Study and Direct Strength Method for Cold-Formed Steel Built-Up I-Sectional Columns under Axial Compression 