压剪应力作用下断续节理岩体的破坏分析  

FAILURE ANALYSIS OF INTERMITTENT JOINTED ROCKS UNDER COMPRESSION-SHEAR STRESS

作　　者：周小平[1] 王建华[1] 哈秋 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《岩石力学与工程学报》2003年第9期1437-1440,共4页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(59879012;59649008)资助项目。

摘　　要：节理岩体的力学特性主要受控于节理,节理间的相互作用及其贯通是岩体工程的重要问题。利用Dugdale-Barenblatt模型揭示了多节理贯通力学机理——主要受外部荷载、节理间的相互作用二因素的影响。利用裂纹尖端的应力强度因子、损伤局部化区的长度确定了节理扩展和贯通的力学条件。通过实验验证了模型的正确性和可行性。其结论对岩体工程的稳定性分析具有重要理论和现实意义。The mechanical behavior of jointed rock mass is mainly controlled by joints. The interaction between joints and the coalescence of joints are important problem for geotechnical engineering. The coalescence of two collinear joints and a periodic row of collinear joints are investigated by using Dugdale-Barenblatt model, and the high level of compression-shear stress and interaction between joints are considered. The mechanical conditions of joint propagation are determined by stress intensity factor and the length of damage and strain localization zone. Experimental validations are given to illustrate the applicability of the proposed model. The conclusions are of important significance for rock mass engineering.

关 键 词：岩石力学 Dugdale—Bgenblan模型 断续节理 贯通 应力强度因子 

分 类 号：TU452[建筑科学—岩土工程]