基于滑移线场理论的边坡稳定性有限元分析

依据统一强度理论和潜在滑移线理论,引入统一材料参数定义,建立适合数值计算的全区域滑移线场方程,根据有限元计算得到的应力场,在弹性区域和塑性区域,分别数值模拟滑移线场,由滑移线场追踪临界滑动面,计算安全系数,解决边坡稳定性分析问题.结果表明,该方法是有效的,可在此基础上分析不同的屈服准则下安全系数和临界滑动面位置的差别.

Finite element analysis of slope stability based on theory of slip line field

Based on the theories of the unified strength and the potential slip line, equations for the full area slip line fields were established by introducing united material parameters. According to the stress fields derived by finite element calculations, the slip line fields in elastic and plastic zones were simulated. The critical slip surface in slopes was searched through the slip line fields and the safety factor was derived so as to solve problems of slope stability. The results show that the proposed method is reliable. It can be employed to analyze differences of safety factors and positions of the critical slip surfaces for various unified yield criteria.