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总览 评价 吕直华 * , 陈郡鹏 ( 河海大学工程力学系; ) 摘要: 在边坡稳定弹塑性有限元分析中,岩土体屈服准则的选取直接影响边坡稳定性的分析结果。本文在相同模型与相同岩土材料参数下,采用ABAQUS大型有限元软件,以塑性迭代计算不收敛作为边坡失稳的
吕直华*, 陈郡鹏
(
河海大学工程力学系; )
摘要:
在边坡稳定弹塑性有限元分析中,岩土体屈服准则的选取直接影响边坡稳定性的分析结果。本文在相同模型与相同岩土材料参数下,采用ABAQUS大型有限元软件,以塑性迭代计算不收敛作为边坡失稳的主要判断标准,分别采用Mohr-Coulomb外角点外接圆模型、Mohr-Coulomb内角点外接圆模型、Mohr-Coulomb内切圆模型、Mohr-Coulomb等面积圆以及Mohr-Coulomb精确匹配圆模型对岩坡的稳定性安全系数进行了研究。通过几种稳定性安全系数进行对比,探讨了屈服准则的选取对安全系数的影响。
关键词:
岩质边坡;安全系数;强度储备法;屈服准则;ABAQUS软件
Lui Zhihua*, Chen Junpeng
(
Mechanical engineering department, Hohai University; )
Abstract:
In the elastic-plastic finite element analysis of slope stability, the selection of rock and soil yield criterion is directly impact the slope stability analysis. Considering the same model and geotechnical materials with the same parameters, using ABAQUS finite element software and plastic iterative calculations do not converge as a major slope failure criterion, using Mohr-Coulomb exterior angle point circumcircle model、Mohr - Coulomb interior angle point circumcircle model、 Mohr-Coulomb inscribed circle model、Mohr-Coulomb equal-area circle model and Mohr-Coulomb accurate matches circle model, this paper has studied the rock slope stability model factor of safety. According to compare several methods’ safety factors, discusses the impact of the yield criteria selection to the safety factor.
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