Abstract: Most geomaterials have the characteristic of strain-softening. Assuming the geomaterials of slope were perfect elasto-plastic medium, the safety factor computed by employing the peak strength parameters would be overestimated. However, if the residual strength parameters of geomaterials were used, the safety factor would be smaller than the actual one. The slope stability analysis method with consideration of the strain softening effect of the rock and soil proposed in this paper can solve the problem of overestimated or underestimated safety factor, and it can simulate progressive failure characteristics of the slope as well.

Key words: slope, strain softening, limit condition, safety factor

摘要： 大多数岩土材料均具有应变软化特性，若视岩土材料为理想弹塑性，基于岩土材料峰值强度的边坡稳定性分析往往会高估边坡的稳定安全系数，可能会导致边坡偏于危险；而材料参数取残余强度时，计算的安全系数又较实际偏小，其分析结果偏于保守。笔者提出的考虑岩土体应变软化效应的边坡稳定性分析方法，可较好地解决该问题，同时可以模拟边（滑）坡的渐进破坏特征。

关键词: 边坡, 应变软化, 极限状态, 安全系数