边坡稳定的三维有限元直接搜索法

提出了一种基于三维有限元应力场计算边坡安全系数与直接搜索临界滑裂面的新方法.对临界滑裂面上的应力分布直接使用三维有限元计算的应力结果,并且直接利用三维有限元的单元体网格面作为滑移面搜索网格面.鉴于有限元单元体网格和图的直观相似性,可以把网格抽象成图,通过引用动态规划中最优化思想搜索临界滑裂面.以三维均质边坡为例,通过三维极限平衡法、三维强度折减法与本文方法的对比分析,验证了本文方法的正确性与合理性.

Slope stability analysis using direct search method based on 3D FEM

A new method to calculate the safety factor and search critical slip surface based on 3D FEM's stress result is given in this paper.In this method,stresses acting along the critical slip surface are computed using 3D FEM analysis,moreover the 3D FEM mesh is used directly as the searching grid,in view of the fact that there is intuitionistic similarity between a FEM mesh and a graph,so the mesh may be abstract to a graph,and the optimized thought in dynamic programming may be used to search.Finally,taking th...