岩体不连续结构面变形研究与界面应力元法  

Researches on the Deformation of the discontinuous Interface of Rock Mass and the Method of Interface Element Stress

作　　者：章青[1] 

机构地区：[1]河海大学工程力学系,江苏南京210098

出　　处：《徐州建筑职业技术学院学报》2002年第3期12-16,共5页Journal of XUZHOU Institute of Architectural Technology

摘　　要：迄今为止岩体不连续结构面的变形问题的研究可归纳为两类 :一类是有限元法辅以不连续结构面模型法 ,第二类是岩体结构面切割法 .近年来第二类方法中的刚体弹簧模型研究迅速地发展 .在此基础上河海大学采用基于单元累积变形于界面层的假定 ,建立了由有限多块元—界面元组合的离散体模型———界面应力元模型 .该模型运用几何微分关系求出界面元上任一点的应变 ,继而借助有关材料介质的本构规律和相邻单元的平衡 ,最终获得界面元上任一点的应力 ,由离散体模型中众多界面上分布的应力构成了整个结构应力场的表征值 .这种模型丰富了不连续介质力学学科内容 ,拓宽了数值方法在岩体工程和其他工程领域方面的应用 .Up to now the researches on the deformation of the discontinuous interface of rock mass can be classified into two groups:one is the finite element method combined with the modelling of the discontinuous interface,the other is the segmentation of the rock texture.In recent years the method of rigid body spring model,which is included in the second group,has developed rapidly.Based on this,the method of interface stress element in the analysis of structures,which is established by Heihai University,adopts the assumption that the accumulated deformation of a unit happens in the interface and establishes a model of discrete unit consisting of finite lump elements and interface elements.The strain at any given point of the interface can be obtained with geometric differentiation,and can be placed in equilibrium with the adjacent unit with the help of the constitutive behavior of the relevant media.Thus the stress at any given point of the interface can finally be obtained.The stresses at the many interfaces of the discrete model constitute the characteristic value of the stress field of the entire structure.This stress model enriches the disciplinary contents of the discontinuous media mechanics and enlarges the application of the numerical method in the field of rock mass engineering and other engineering fields.

关 键 词：岩体 不连续结构面 变形分析 界面应力元法 离散体模型 不连续介质力学 岩石工程 

分 类 号：TU45[建筑科学—岩土工程]