主应力轴旋转对剪切带形成的影响分析  

An influence on shear band formation of the rotations of principal stress directions

作　　者：张启辉[1] 赵锡宏[1] 

机构地区：[1]同济大学地下工程系,上海200092

出　　处：《岩土力学》2000年第1期32-35,共4页Rock and Soil Mechanics

摘　　要：软土的剪切带形成对于研究土的工程性质、土体稳定性评价有重要的意义。采用可以考虑主应力轴旋转影响的土的弹塑性本构模型———关口 太田模型 ,分析主应力轴旋转对剪切带形成的影响 ,得出最可能发生局部剪切变形的方向同主应力轴的旋转角有关 。The analysis of the formation of shear band will benefit both the study of the engineering behavior of soils and the evaluation of their stability. Based on elasto plastic model proposed by Sekiguichi and Ohta, the influence on shear band formation of the rotation of principal stress directions is investigated. It can be concluded that the directions along which local shear deformation may occur most probably depend on the rotation angle of the principal stresses, but the rotation of principal axis doesnt contribute significantly to the instability by localization of the deformation.

关 键 词：剪切带 主应力轴旋转 影响分析 土体稳定性 

分 类 号：TU432[建筑科学—岩土工程]