岩土力学2012，Vol.33Issue(11)：3472-3478,7.
有限元强度折减法计算边坡稳定的对比分析
Comparative analysis of slope stability by strength reduction method
摘要
Abstract
The strength reduction method, which is popular at present in the slope stability analysis, is used to analyze the relative error of calculation results by using software MIDAS/GTS, FLAC, ANSYS with D-P and M-C yield criteria in three cases (soft clay, hard clay, weak expansive soil). In the case of soft clay the relative error of calculation results by using D-P criterion and M-C criterion is relatively small. For hard clay slope, the relative error of calculation results by using D-P criterion and M-C criterion increases significantly. The calculation results by using three kinds of software with two yield criteria all indicate that sliding surface in hard clay is shallower than the sliding surface in weak expansive soil and soft clay. Under the same circumstances, sliding surface determined by MIDAS is shallower than the result by ANSYS. When the slope is small the safety factor of the calculation by MIDAS is smaller than that by FLAC (M-C); when slope is large the result is opposite. When slope is small the calculation convergence is realized after the breakthrough of plastic zone, but for large slope calculation divergence occurs before the breakthrough of plastic zone. In the case of small slope the difference between reduction factors upon appearance of calculation divergence and upon breakthrough of plastic zone is significant. But the difference between reduction factors is relative small in the case of large slope, even breakthrough of plastic zone does not occur upon the calculation divergence, which is more remarkable when using MIDAS software.关键词
边坡/强度折减法/强度准则/安全系数Key words
slope/ method of strength reduction/ strength criterion/ safety factors分类
数理科学引用本文复制引用
程灿宇,罗富荣,戚承志,王霆..有限元强度折减法计算边坡稳定的对比分析[J].岩土力学,2012,33(11):3472-3478,7.基金项目
北京市教委科研计划项目及北京市自然基金资助项目(No.KZ200810016007) （No.KZ200810016007）
国家自然基金资助项目(No.51174012,No.50825403) （No.51174012,No.50825403）
国家重点基础研究发展计划(973)项目(No.2010CB732003) （973）
非线性动立系统建模与分析团队(No.PHR201107123). （No.PHR201107123）
