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用有限元强度折减法求边坡稳定安全系数
引用本文:赵尚毅,郑颖人,时卫民,王敬林.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
作者姓名:赵尚毅  郑颖人  时卫民  王敬林
作者单位:后勤工程学院军事土木工程系;后勤工程学院军事土木工程系 重庆400041;重庆400041;
摘    要:利用有限单元法 ,通过强度折减来求边坡稳定安全系数。通过强度折减 ,使系统达到不稳定状态时 ,有限元计算将不收敛 ,此时的折减系数就是安全系数。安全系数的大小与所采用的屈服准则有关 ,本文对几种常用的屈服准则进行了比较 ,导出了各种准则互相代换的关系 ,并采用莫尔 -库仑等面积圆屈服准则代替莫尔 -库仑准则 ,算例表明由此求得的边坡稳定安全系数与传统方法的计算结果十分接近

关 键 词:边坡安全系数  有限元  屈服准则  
文章编号:1000-4548(2002)03-0343-04
修稿时间:2001年8月9日

Analysis on safety factor of slope by strength reduction FEM
ZHAO Shangyi,ZHENG Yingren,SHI Weimin,WANG Jinglin.Analysis on safety factor of slope by strength reduction FEM[J].Chinese Journal of Geotechnical Engineering,2002,24(3):343-346.
Authors:ZHAO Shangyi  ZHENG Yingren  SHI Weimin  WANG Jinglin
Affiliation:Logistical Engineering University Chongqing 400041 China
Abstract:An analysis on safety factor of slope through c-φ reduction algorithm by finite elements is presented. When the system reaches instability, the numerical non convergence occurs simultaneously. The safety factor is then obtained by c-φ reduction algorithm. The factor is related to the yield criterion. This paper presented a comparison of several yield criterions in common use and deduced the substitutive relationship of them. For convenience the Mohr Coulomb criterion is replaced by Mohr Coulomb equivalent area circle criterion, which was proposed by professor Xu Gancheng and Zheng Yingren in 1990. Through a series of case studies, the safety factor of FEM is fairly close to the result of traditional limit equilibrium method. The applicability of the proposed method was clearly exhibited.
Keywords:slope safety factor  finite elements  yield criterions
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