摘要
一种状态相关本构模型被置于耦合的有限元程序中,分析了平面应变条件下饱和砂土在排水剪切过程中的变形局部化问题。由于模型中固有的状态相关特性,初始有效平均正应力与土样密度对变形局部化的影响得到了详细研究。数值分析结果表明,砂土中的变形局部化取决于土样的状态,有效平均正应力越小,土样密度越大,变形局部化程度就越高,剪切带与大主应力面的夹角也就越大。
A state-dependent sand model is implemented in a fully-coupling finite element program to investigate the strain localization problems in sand under drained plane strain condition. Due to its state-dependent feature,the coupling influence of effective mean normal stress and density of soil sample on the strain localization is studied in details. The numerical predictions show that the orientation of shear band is strongly related to effective mean normal stress and material density. The lower the effective mean normal stress is,the less the void ratio of soil samples is and the larger the inclination angle of shear band is.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第4期533-538,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
饱和砂土
排水剪切
土样密度
剪切带
变形
soil mechanics,state-dependent,sand,strain localization,effective mean normal stress,shear band
