基于有限元强度折减法的地震区三维边坡稳定性分析

Three-Dimensional Slope Stability of Earthquake Zone Based on Strength Reduction FEM

结合工程实例,采用有限元强度折减法对地震区三维边坡进行静力和拟静力分析,探讨了该方法的基本原理、屈服准则和失稳判据等。在采用有限元软件ANSYS求得三维边坡安全系数的基础上,对边坡的稳定性进行了评价;同时与传统极限平衡方法、二维有限元法所得的安全系数进行对比。结果表明:有限元强度折减法应用于地震区三维边坡稳定性分析是可行的。

Combining with engineering examples,the strength reduction FEM is used to do static and pseudo-static analysis on the three-dimensional slope;the basic principle,yield criterion,instability criterion etc.of the strength reduction FEM are also discussed.The safety factors of the three-dimensional slope are obtained by use of the finite element software ANSYS;furthermore,the slope stability is evaluated.At the same time,the safety factors got by the proposed method are compared with those got by the traditional limit equilibrium method and 2D FEM.The results show that it is feasible that strength reduction FEM is applied in three-dimensional slope stability analysis of the earthquake zone.