节理面JRC-JCS非线性准则的数值计算方法  

Numerical embedding in FLAC3D of JRC-JCS model of joint plane

作　　者：吴启红[1] 徐青[1] 雍军[1] 廖贤[1] 

机构地区：[1]成都大学城乡建设学院,四川成都610106

出　　处：《中南大学学报（自然科学版）》2013年第9期3829-3833,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50878212);四川省科技计划项目(2013JY0119);成都大学人才引进基金资助项目(2012年)

摘　　要：为了采用JRC-JCS模型描述岩体节理非线性强度特征,首先,研究JRC-JCS强度非线性模型参数和Mohr-Coulomb强度线性模型参数之间的关系;然后,探讨JRC-JCS模型的数值实现方法,并通过节理室内剪切试验结果对数值模拟结果进行验证;最后,分析非线性模型参数对节理剪切强度的影响。研究结果表明:黏结力c和内摩擦角随节理粗糙系数JRC的增大而呈非线性增大;黏结力c随岩体压缩强度JCS的增大呈线性增大,而内摩擦角随JCS的增大而呈非线性增大。JRC的变化对于剪切强度的影响要比JCS的影响突出;验证了JRC-JCS模型数值计算方法的正确性。In order to describe the nonlinear strength characteristic of rock mass joint plane by JRC-JCS model,firstly,the relations among the parameters of JRC-JCS model and Mohr-Coulomb model were studied,then the numerical realization method of JRC-JCS model was analyzed.And the results from the numerical simulation were verified by the results from the lab shear tests of joint plane.Finally,the effect of the parameters of the nonlinear model to the shear strength of joint plane was analyzed.The results show that cohesion c and friction angle increase in the nonlinear form with the increase of joint rough coefficient JRC;with the increase of rock compression strength JCS,the cohesion increases in the linear form,but increases in the nonlinear form.JRC has larger impact on the shear strength of joint plane than JCS.Validation of numerical calculation method for JRC-JCS model is correct.

关 键 词：节理面 JRC-JCS模型 数值计算 非线性 

分 类 号：TU452[建筑科学—岩土工程]