基于有限元强度折减法的边坡稳定性分析

运用有限元强度折减法进行边坡的稳定性分析，同时运用简化bishop法对比结果，发现运用强度折减法进行边坡稳定性分析时，伴随着折减系数的增大，边坡的坡顶水平位移最初缓慢增大，但当折减系数接近边坡的安全系数，坡顶水平位移突然急剧减小，边坡的塑性区也伴随着折减系数的增大，从无到有，直到基本贯通。运用简化bishop法计算的结果和强度折减法的结果对比后得知，两者计算得到破裂面基本一致，但是简化bishop法得到的安全系数偏于保守。

The Stability Analysis of Slope Based on FEM strength reduction

In this paper, apply ＂FEM strength reduction＂ to carry out slope stability analysis, at the same time, apply ＂Bishop＇s simplified method＂ to compare the result. Follow the reduction factor increases, the maximum horizontal displacement that at the top of slope was increased slowly in the initial stage, but when the reduction factor close to the safety factor , the maximum horizontal displacement was reduced quickly. And, follow the reduction factor increases , the plastic zones from scratch, until through. For comparing, I find the damage surface that calculated by the two ways ,are basically consistent, but the safety factors are conservative by the ＂Bishop＇s simplified method＂.