考虑裂隙间相互作用情况下围压卸荷过程应力应变关系  

Constitutive Mode! for Crack-weakend Rock Mass under Confining Pressure Unloading with Crack Interaction Effect

作　　者：周小平[1] 哈秋聆[2] 张永兴[2] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200030 [2]重庆大学建筑工程学院,重庆400045

出　　处：《力学季刊》2002年第2期227-235,共9页Chinese Quarterly of Mechanics

摘　　要：岩体的稳定性和变形特性主要决定于裂隙,同时裂隙间的相互作用对岩体的稳定和变形产生显著的影响。裂隙岩体在加载和卸荷条件下的力学特性有显著的区别。为此本文首次利用位错模型法结合叠加原理研究在围压卸荷条件下裂隙间的相互作用对岩体的变形的影响问题。文中推导了考虑裂隙间的相互作用情况下裂隙岩体围压卸荷过程的应力应变关系及应力强度因子表达式,且进行了数值计算。The stability and deformation of rock mass are controlled by cracks, on which crack interaction obviously influences. The mechanical behavior of rock mass under unloading is different from that of rock mass under loading. In the paper, the interacting model under confining pressure unloading was investigated by means of dislocation model. Constitutive equations for crack-weakened rock mass and SIF under confining pressure unloading with crack interaction effect were determined, and the numerical results were given.

关 键 词：相互作用 围压卸荷 应力应变关系 裂隙岩体 位错模型 

分 类 号：TU452[建筑科学—岩土工程]