砂的原生各向异性强度的研究  

On the Inherent Anisotropic Strength of Sand

作　　者：杨林德[1] 张向霞[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2007年第1期14-18,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(No.50378069)

摘　　要：基于已有各向异性砂的实验资料,借鉴复合材料力学中矩阵转换的数学方法,将实际各向异性砂样的柔度矩阵(或刚度矩阵)转化为各向同性参考砂的柔度矩阵(或刚度矩阵),并提出相当应力状态的概念,由此把对各向异性岩土材料的分析转换为对等效各向同性材料的分析,使各向同性强度理论能够方便地应用于各向异性材料。通过分析,发现理论所得结果与已有的实验结果吻合,表明文中的计算理论是可行的。Based on the experiment of the anisotropic sands, the method of matrix transformation used in the compound material mechanics is introduced, then the anisotropic flexibility matrix of the anisotropic sand is transformed into an isotopic one of certain isotropic reference sand with the corresponding stress state, and a corresponding stress state is advanced simultaneously, so the analysis on anisotropic material can be transformed into the analysis on isotropic material then the isotropy strength theory can be applied to the anisotropic material easily. The calculation results are quite matched with the experiment results of various sands, which show that the method proposed in this paper is feasible.

关 键 词：砂 各向异性 矩阵转换 相当应力 

分 类 号：TU431[建筑科学—岩土工程]