用有限元强度折减法计算边坡安全系数

摘要

利用三种D-P准则，采用强度折减有限元法并借助ANSYS软件分析了边坡的稳定性，并给出了滑裂面及安全系数，计算结果表明，滑裂面可根据土坡破坏时等效塑性区应力云图和x方向位移云图确定；用摩尔一库仑匹配D．P准则分析边坡稳定的结果与传统的极限平衡Spencer法计算结果的误差仅为1％左右，在工程计算中具有一定的实用性和可靠性。%The paper analyzes the stability of the slopes by using three D-P principles, the finite element strength reduction method and ANSYS software, provides the slide plane and its safety coefficient, proves by the calculation results the slide plane can be identified according to the stress nephogram of equivalent plastic zone and x-direction displacement nephogram in the destruction of the slopes, and the error of the analysis results of slope stability with the moore-coulomb matching D-P principle and the one of the traditional ultimate balance Spencer method is only 1%, so it have certain application and reliability in engineering calculation.