含二阶规则起伏体结构面的剪切试验研究  

A study of shearing tests of structural plane with regular second-order asperities

作　　者：朱小明[1] 刘博[1] 王长柏[1] 邹飞[1] 莫振泽[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉430071

出　　处：《水文地质工程地质》2011年第3期38-41,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(40872188)

摘　　要：通过常法向应力直剪试验研究了含不同二阶规则起伏体高度结构面的剪切特性。试验结果表明:与只含一阶起伏体结构面不同,含二阶起伏体结构面会有多峰值剪应力和波浪状的变形曲线,会出现多次剪断破坏或一次剪断破坏的破坏特征,随着二阶起伏体高度的增大,结构面剪切强度增大。The mechanical properties of structural planes with different heights of regular second-order asperities are examined by the monotonic shear tests under constant normal stress. The experimental results show that the structural planes with second-order asperities have multi-peak shear stress and wavy deformation curves, and the failure modes may appear many-times or one-time shearing of asperities, which are different from the structural planes with the only first-order asperities. Peak shear strength increases with the increasing second-order asperities height.

关 键 词：结构面 二阶起伏体 剪应力 破坏特征 

分 类 号：TU457[建筑科学—岩土工程]