摘要
剪切带的扩展问题是土坡应变局部化和渐进破坏分析的一个关键问题。为研究土质边坡中的局部化剪切带扩展,以大变形的分岔理论作为局部化判断条件,对简单土质边坡采用Dmcker-Prager屈服准则,采用基于弹塑性大变形基本原理的有限元法成功捕捉到了边坡中的剪切带的位置及其扩展情况,同时发现土质边坡破坏过程中局部化剪切带并非唯一,并根据局部化剪切带的扩展情况研究了简单土质边坡的渐进破坏,同时以边坡的局部化剪切带的贯通为标准分析了该边坡的稳定性。
The extension of shear bands is one of the key issues encountered in the strain localization and progressive failure analysis of slopes.Based on the bifurcation theory of large deformation which is adopted as the condition of onset of strain localization,the situation and the extension of shear bands in simple soil slopes were captured successfully by using the elastoplastic large deformation finite element method and Drucker-Prager yield criterion.The shear bands which were not only one were found during the failure process of soil slopes.And the progressive failure of simple soil slopes was analyzed based on the extension of shear bands.The soil slope stability was analyzed by the criterion of slope failure which is shear band running through from the bottom to the top of slopes.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2008年第S1期291-294,共4页
Chinese Journal of Geotechnical Engineering
基金
中国博士后科学基金项目(20070411181)
关键词
应变局部化
有限元法
弹塑性
土质边坡
剪切带
渐进破坏
strain localization
finite element method
elasto-plasticity
soil slope
shear band
progressive failure
