基于能量耗散与释放原理的岩石强度与整体破坏准则  

CRITERIA FOR STRENGTH AND STRUCTURAL FAILURE OF ROCKS BASED ON ENERGY DISSIPATION AND ENERGY RELEASE PRINCIPLES

作　　者：谢和平[1] 鞠杨[1] 黎立云[1] 

机构地区：[1]中国矿业大学(北京)岩石混凝土破坏力学重点实验室

出　　处：《岩石力学与工程学报》2005年第17期3003-3010,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2002CB412705);北京市教委重点实验室项目(SYS102900438)

摘　　要：讨论了岩石变形破坏过程中能量耗散、能量释放与岩石强度和整体破坏的内在联系。指出岩石变形破坏是能量耗散与能量释放的综合结果。能量耗散使岩石产生损伤,并导致岩性劣化和强度丧失;能量释放则是引发岩石整体突然破坏的内在原因。定义了单元耗散能、可释放应变能、强度丧失和整体破坏的概念。给出了基于能量耗散的强度丧失准则和基于可释放应变能的整体破坏准则,分析了各种应力状态下岩石单元整体破坏的临界应力。并应用上述准则讨论了隧洞围岩发生整体破坏的临界条件。The intrinsic relations between energy dissipation, energy release, and strength and abrupt structural failure of rocks during failure process are discussed. It is emphasized that the failure of rock is a process in which energy dissipation and energy release occur simultaneously. The energy, part of work done by external forces, dissipates to produce damage and irreversible deformation inside rock and makes the material deteriorate and its strength drop down eventually. The strain energy released in rock volume plays the pivotal role of abrupt structural failure of rock. The concepts of energy dissipation, energy release, strength loss and abrupt structural failure of rock are defined. On the basis of these concepts, the criteria for strength and abrupt structural failure of rock are proposed. The critical stresses at the time of abrupt structural failure of rock under various stress states can be determined by these principles. The energy criteria surrounding rock masses of a circular tunnel in practice have been applied to analyzing the failure condition of

关 键 词：岩石力学 能量耗散 能量释放 强度丧失 整体破坏 岩石 

分 类 号：TU452[建筑科学—岩土工程] O346.5[建筑科学—土工工程]