基于SMP的岩土各向异性强度准则  

Failure criterion based on SMP for anisotropic geomaterials

作　　者：罗汀[1] 李萌[1] 孔玉侠[1] 姚仰平[1] 

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100191

出　　处：《岩土力学》2009年第S2期127-131,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50879001;10672010;10872016)

摘　　要：基于SMP准则,假定材料的摩擦角随沉积面和SMP的夹角而变化,通过主应力空间和物理空间的变换,将SMP的法向量变换到物理空间,以沉积面和SMP的最小夹角α为参数提出了一个各向异性强度峰值Mα。从而得到一个各向异性强度准则,适用于横观各向同性岩土材料,通过试验条件下的数据验证表明,该各向异性强度准则能够较好地描述各向异性土的强度变化规律。Based on SMP criterion,a new strength criterion is proposed for anisotropic geomaterials.Through the transformation between the principal stress space and the physical space,a normal vector of the SMP is transformed to the physical space.Assuming that the friction angle is changed with the angle between deposition and the SMP,a new expression of anisotropic strength peak Mα is proposed,which can represent the anisotropy associated with particles' orientation distribution.Verification by experiment data shows that the anisotropic strength criterion can be used to describe the anisotropy of soil strength variation.

关 键 词：强度准则 各向异性 强度峰值 空间滑动面 

分 类 号：TU43[建筑科学—岩土工程]