岩土力学2012，Vol.33Issue(1)：314-318,5.
基于场变量的边坡稳定分析有限元强度折减法
Strength reduction FEM for slope stability analysis based on field variable
摘要
Abstract
In the implementation of strength reduction finite element method (SRFEM), the input file will be modified by hand based on various reduction factors to do trial calculation, the process is trivial. In order to simplify the computational process and improve efficiency, on the basis of SRFEM, combined with field variable provided by ABAQUS, a new technique for strength reduction calculation is presented-field variable based strength reduction finite element method. Cohesions and internal friction angles of rock and soil mass are assigned as functions of field variable in ABAQUS; field variable is assigned as a function of step time t, the cohesions and internal friction angles can be reduced with the increase of t, the safety factor of slope can be obtained in a single simulation process, which avoid modifying of input file and without repeating the trial calculation. Combined with some literatures, the validation of this technique for slope stability analysis has been done; the computational efficiency is compared with bisection method in the determination of safety factor. The results show that: the safety factor obtained by this method is effective and reliable; this technique is feasible for slope stability analysis; this technique simplifies the process of calculation; the efficiency of calculation is improved.关键词
基于场变量的有限元强度折减法/边坡稳定分析/破坏判据/安全系数/滑面/ABAQUSKey words
strength reduction FEM based on field variable/slope stability analysis/failure criterion/safety factor/slip surface/ABAQUS分类
数理科学引用本文复制引用
李宁,许建聪..基于场变量的边坡稳定分析有限元强度折减法[J].岩土力学,2012,33(1):314-318,5.基金项目
国家自然科学基金资助项目(No.40872179). （No.40872179）
