A New Unified Solution for Circular Tunnel Based on a Four-Stage Constitutive Model considering the Intermediate Principal Stress

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">State</td><td class="align_center">Elasto-perfectly plastic</td><td class="align_center">Perfectly plastic strain softening</td><td class="align_center">Strain-softening damage</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Value</td><td class="align_center">0.200</td><td class="align_center">0.152</td><td class="align_center">0.028</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

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Advances in Civil Engineering

tab3

Table 3

Table 3: A New Unified Solution for Circular Tunnel Based on a Four-Stage Constitutive Model considering the Intermediate Principal Stress 