基于变形分析的边坡潜在滑面的确定

DETERMINATION OF POTENTIAL SLIDE LINE OF SLOPES BASED ON DEFORMATION ANALYSIS

基于弹塑性有限元分析的计算结果,提出了二维情况下边坡潜在滑移线应满足的一个常微分方程组初值问题,给出了该初值问题的预测-校正算法以及确保其收敛的充分必要条件,讨论了潜在滑移线的自动搜寻技术。最后,分别与极限分析法和极限平衡法的计算结果进行了对比,验证了方法的有效性。

Based on the computational results from elasto-plasticity finite element analysis,an initial value problem related to a system of ordinary differential equations(ODEs) is formulated to define the potential slide lines(PSL) for two dimensional cases. A prediction-correction algorithm for the ODEs and a necessary and sufficient condition that assures the convergence of the algorithm are presented. The skills for searching PSL with presented method are discussed,and the procedures of this method have been validated against traditional limit analysis methods and limit equilibrium method.