各向异性土体强度表述方法的研究(英文)  

Research on the Strength Formulation of Anisotropic Soil

作　　者：张向霞[1] 杨林德[1] 邓检良[2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]湘潭大学土木与力学学院,湘潭411105

出　　处：《科学技术与工程》2005年第18期1248-1251,1263,共5页Science Technology and Engineering

基　　金：国家自然科学基金50378069资助

摘　　要：对各向异性土体的强度条件研究建立一种新的表述方法。借鉴复合材料力学中矩阵转换的数学方法,将各向异性砂样的柔度矩阵(或刚度矩阵)转化为各向同性等效参考砂的柔度矩阵(或刚度矩阵),同时导出与其相当的应力状态的表达式,以使对各向异性岩土材料的分析可转换为对各向同性状态进行分析,由此可将以前基于各向同性假设的强度条件能够用于各向异性土体。将计算结果与已有实验结果作了比较,发现两者具有较好的一致性。A new method to express the strength condition of the anisotropic soil is propsed.Based on the method of matrix transformation used in the compound material mechanics,the anisotropic flexibility matrix （or stiffness matrix） of the anisotropic sand with a certain stress state is transformed to be an isotopic one of a certain isotropic reference material with the corresponding stress state,and a corresponding stress matrix is obtained simultaneously.By this step,the anisotropic soil material is transformed to the isotropic reference material.Then.the isotopic strength theory is applied on this isotropic reference material.Finally, the isotropy strength theory is expressed by the original stress matrix of the anisotropic soil.The calculation results are quite matched with the experiment results.

关 键 词：各向异性 矩阵转换 相当应力 莫尔-库仑强度理论 

分 类 号：TU431[建筑科学—岩土工程]