岩土力学2011，Vol.32Issue(12)：3751-3754,3762,5.
采用不同Drucker-Prager屈服准则得到的边坡安全系数的转换
Transformation of slope safety factor based on different Drucker-Prager criteria
钟才根 1张斌2
作者信息
- 1. 同济大学土木工程学院,上海200092
- 2. 中交路桥技术有限公司,北京100029
- 折叠
摘要
Abstract
The characteristics of Drucker-Prager yield surface transformation during the strength reduction process by strength reduction finite element method in slope stability analysis under the plane strain condition are analyzed. Currently, the Mohr-Coulomb hexagon circumcircle Drucker-Prager criterion is adopted in the ANSYS finite element analysis programme. So, the safety factor using ANSYS with the Mohr-Coulomb hexagon circumcircle Drucker-Prager criterion is calculated; thus the safety factor based on the Drucker-Prager yield criterion such as the Mohr-Coulomb matching Drucker-Prager yield criterion under the plane strain condition can be obtained using the deduced conversion formulae. Under the plane strain condition, ihe Mohr-Coulomb yield criterion in the ANSYS programme without secondary programming development through equivalent substitution is adopted. The safety factor conversion formula with different Drucker-Prager yield criteria is deduced. The safety factors calculated with conversion formula and those calculated by traditional method are compared through slope models analysis using ANSYS, and the error between the results obtained by strength reduction finite element method with different Drucker-Prager yield surfaces are investigated. A series of case studies indicate that the average error of safety factors between those obtained by conversion formula and those by calculation is slight. The applicability of the proposed method is clearly verified.关键词
边坡稳定分析/有限元强度折减法/Drucker-Prager准则/安全系数转换Key words
slope stability analysis/ strength reduction finite element method/ Drucker-Prager yield criterion/ safety factor conversion分类
矿业与冶金引用本文复制引用
钟才根,张斌..采用不同Drucker-Prager屈服准则得到的边坡安全系数的转换[J].岩土力学,2011,32(12):3751-3754,3762,5.
