岩体断裂的破坏机理与计算模拟  

FRACTURE MECHANISM AND CALCULATION OF ROCK FRACTURE

作　　者：王元汉[1] 徐钺[2] 谭国焕[2] 李启光[2] 

机构地区：[1]华中理工大学土木工程系,武汉430074 [2]香港大学土木工程系岩石工程研究中心

出　　处：《岩石力学与工程学报》2000年第4期449-452,共4页Chinese Journal of Rock Mechanics and Engineering

摘　　要：受压岩体中的裂纹问题 ,可以归结为压剪裂纹和拉剪裂纹两种类型。具体讨论了受压岩体中的斜裂纹问题和翼形裂纹问题 ,对两种不同裂纹类型的扩展机理进行了分析 ,给出了应力强度因子的计算方法。最后以受单向压缩的裂纹扩展为例 ,说明了具体的计算模拟过程。Fracture problems of rock under compression can be classified by the stress states at the crack tips into two kinds. One is the tension shear fracture, the other is the compression shear fracture. The problems of slant crack and wing crack in rock are discussed. The mechanism of two kinds of fracture are analyzed, and the formulae of the stress intensity factors and fracture criteria are obtained.At the same time, the example of crack extension of rock under compression is given to show the validity of the present method and calculation process.

关 键 词：岩体断裂 压剪断裂 拉剪断裂 计算模型过程 

分 类 号：TU452[建筑科学—岩土工程]