平面应变状态下边坡安全系数的近似求解
摘要:Mohr-Coulomb屈服准则不考虑中间主应力对材料强度的贡献,是一个保守的强度屈服准则,在近似平面应变状态下,匹配于Mohr-Coulomb屈服准则的Drucker-Prager屈服准则能给出边坡安全系数偏保守一些的估计;相对而言,Matsuoka-Nakai和Lade-Duncan屈服准则均考虑了中间主应力对土体强度的影响,在近似平面应变状态下,匹配于Matsuo-ka-Nakai和Lade-Duncan屈服准则的Drucker-Prager屈服准则能给出岩土类材料较为合理的破坏强度预测,土体的抗剪强度能被更有效地发挥出来,因而借助这些转化的Drucker-Prager屈服准则能给出平面应变状态下土坡安全系数较为合理和真实的预测。文中的边坡稳定算例证实了这些观点。
Abstract:Mohr-Coulomb yield criterion, which does not consider the contribution of intermediate principal stress to soil strength,is a conservative yield criterion, thus Drucker-Prager yield criteria transformed from the Mohr-Coulomb yield criterion under approximate plane strain condition, will give conservative estimation of safety factor for plane strain slope stability analyses. Relatively, Matsuoka-Nakai and Lade-Duncan yield criteria both consider the influence of the intermediate principal stress on soil strength effectively, thus Drucker-Prager yield criteria transformde from the Matsuoka-Nakai and Lade-Duncan yield criteria under approximate plane strain conditions, could give a reasonable failure strength predictions for geo-materials, soil shear strength could be exerted more sufficiently under plane strain status, and therefore more reasonable and real safety factors could be exerted more sufficiently under plane strain status, and therefore more reasonable and real safety factors could be obtained by using the transformed Drucker-Prager yield criteria for slope stability analyses. Calculation results of planme strain slope stability given by using ANSYS prove above views.
中文标题：
平面应变状态下边坡安全系数的近似求解
Approximate Solution to Safety Factor of Slope Stability Under Plane Strain Condition
作者：
杨雪强1,凌平平2,陈桂林3
Yang Xueqiang1,Ling Pingping2,Chen Guilin3
作者简介:杨雪强,1966年生,男,汉族,河南唐河县人,工学博士,教授,从事岩土类材料的强度与变形特性、边坡稳定与挡土结构土压力等方面的研究工作。Email:xqyfls@126.com
通讯地址：
1. 广东工业大学建设学院, 广东广州 510006; 2. 华中科技大学武昌分校, 湖北武汉 430068; 3. 福州市城市建设发展总公司, 福建福州 350011
1.GuangdongUniversityofTechnology,GuangzhouGuangdong510006; 2.BranchofHuazhongUniversityofScienceandTechnology,WuhanHubei430068; 3.FuzhouGeneralDevelopmentCompanyofCityConstruction,FuzhouFujian350011China
中图分类号:O32
出版物：岩土工程技术
收稿日期:2008-05-15
网络出版日期:2021-07-07
关键词:屈服准则,强度折减有限元法,平面应变,安全系数
Key words:yield criterion,strength reduction finite element method,plane stain,safety factor
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