人民黄河Issue(2)：135-137,140,4.DOI:10.3969/j.issn.1000-1379.2014.02.044
有限元强度折减法边坡失稳判据适用性分析
Analysis on the Applicability of Criterions for Evaluating Slope Stability Based on Strength Reduction FEM
史俊涛 1孔思丽 1任琪1
作者信息
- 1. 贵州大学土木工程学院，贵州贵阳550025
- 折叠
摘要
Abstract
In order to study the applicability and rationality of various instability criterions,the safety factors of an specific slope used ideal elastic-plastic finite element analytical model were calculated by using strength reduction technique respectively according to the convergence of numerical computations,the displacement catastrophe at a certain characteristic position and the connectivity of plastic zone. The computed results were com-pared with the solution of limit equilibrium method. It is shown that:the safety factors calculated by three criterions of slope instability are ap-proached to the solution of traditional limit equilibrium method,and the computed result by using the displacement catastrophe at certain character-istic site is consistent with the result based on the connectivity of plastic zone,while the computed result on the basis of convergence of numerical computations may give a little bigger estimation of safety factor than other two criterions compared with procedures of traditional limit equilibrium. Considering the effect of convergence criteria and limit value on convergence of numerical computations,the combination of displacement catastro-phe at a certain characteristic position and connectivity of plastic zone are suggested as the comprehensive evaluation of slope failure criterions.关键词
强度折减法/失稳判据/稳定性分析/屈服准则/安全系数/塑性区域Key words
strength reduction method/instability criterion/stability analysis/yield criterion/safety factor/plastic zone分类
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史俊涛,孔思丽,任琪..有限元强度折减法边坡失稳判据适用性分析[J].人民黄河,2014,(2):135-137,140,4.
