节理岩体正交各向异性等效变形参数研究  

Orthotropic equivalent deformation parameters of jointed rock mass

作　　者：张贵科[1] 徐卫亚[2] 

机构地区：[1]二滩水电开发有限责任公司,四川成都610051 [2]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《岩土工程学报》2010年第6期908-915,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家重点基础研究发展规划项目(973项目)(2002CB412707);国家自然科学基金项目(50539110)

摘　　要：将节理岩体变形视为线弹性的岩块变形和非线性弹性的结构面变形之和,在分析已有结构面变形特点的基础上,提出了一种新的结构面法向变形计算公式,该公式可以考虑岩体初始应力状态对变形的影响。然后,利用岩体裂隙网络和等效连续应变理论,研究节理岩体等效应变的计算方法,并根据正交各向异性的弹性本构模型,将岩体作为正交各向异性连续材料计算其等效变形参数。最后,编制相应的计算程序,通过计算实例验证了研究成果的合理性。The deformation of rock mass is considered as the summation of the linear elastic deformation of intact rock block and nonlinear elastic deformation of joints.On the basis of deformation characteristics of joints,a new constitutive model for normal displacement of joints is presented.It considers the influence of the initial stress state on the deformation.The computation method for jointed rock mass equivalent strain is studied by use of the joint network and the theory of equivalent continuous strain.According to the elastic orthotropic constitutive model,the rock mass is regarded as orthotropic continuous material,and the orthotropic equivalent deformation parameters are computed.The computation codes of orthotropic equivalent deformation parameters are developed.The example verification is carried out to test the rationality of the analytic results and the codes.

关 键 词：节理岩体 正交各向异性 等效变形参数 等效连续应变理论 

分 类 号：TU43[建筑科学—岩土工程]