基于极限平衡条件的土体局部稳定分析

英文篇名：Analysis on Local Stability of Soil Mass Based on Limit Equilibrium Condition
中文刊名：西北地震学报
英文刊名：Northwestern Seismological Journal
作者：邵龙潭 ; 刘士乙
英文作者：SHAO Long-tan ; LIU Shi-yi(State Key Laboratory of Structural Analysis of Industrial Equipment ; Dalian University of Technology ; Liaoning Dalian 116085 ; China)
中文关键词：土体 ; 极限平衡条件 ; 安全系数 ; 局部破坏 ; 有限元应力分析
英文关键词：Soil mass ; Limit equilibrium condition ; Safety factor ; Local failure ; Stress analysis with finite element method
出版日期：2011-09-30
机构：大连理工大学工业装备结构分析国家重点实验室;
年：2011
期：03
出版单位：西北地震学报

摘要

根据土体结构的应力及摩尔-库仑强度理论分析其局部稳定性。以土体内部任意曲面的剪应力积分值与抗剪强度积分值的比值为安全系数K,并认为|K-1.00|≤0.05为极限平衡状态。通过两个算例模拟了地基与均质边坡随外荷载增加,土体内部由局部达到极限状态发展成整体达到极限状态,最终失稳破坏的过程。结果表明此方法模拟土体结构渐进破坏过程是可行的。
Based on the Mohr-Coulomb strength theory and the stress analysis of geotechnical engineering structures,the local stability of soil mass is conducted.In soil mass,ratio of the integral value of the shear stress and the integral value of the shear strength along any slip surface is defined as safety factor K,and when |K-1.00|≤0.05,it is supposed to be reaching the limit equilibrium state.The numerical simulation results for two cases show that,with the increase of the load,soil mass or soil slope reache limit equilibrium state from part to globe,finally,to globe failure.It is also proved that this method is available to simulate the progressive failure process of soil mass.

引文

[1]穆鹏,吴伟红,杨涛.2009年兰州市九州石峡口滑坡成因及其西侧高边坡稳定性研究[J].西北地震学报,2010,32(4):343-348.
    [2]范昭平,张丽华.地震作用下边坡稳定性分析[J].西北地震学报,2010,32(4):339-342.
    [3]王庚荪.边坡的渐进破坏及稳定分析[J].岩石力学与工程学报,2000,19(1):29-33.
    [4]唐洪祥,李锡夔.土工结构物渐进破坏过程COSSERAT连续体有限元分析[J].大连理工大学学报,2010,50(3):320-326.
    [5]王庚荪,孔令伟,郭爱国,等.含剪切带单元模型及其在边坡渐进破坏分析中的应用[J].岩石力学与工程学报,2005,24(21):3852-3857.
    [6]邵龙潭,李红军.土工结构稳定分析-有限元极限平衡方法及其应用[M].北京:科学出版社,2011.