岩体动力变形破坏的层次特性(英文)  

Hierarchic Nature of Dynamic Deformation and Fracture of Rock Mass

作　　者：戚承志[1] 王明洋[2] 陈剑杰[2] 钱七虎[2] QI Cheng-zhi;WANG Ming yang;CHEN Jian-jie;QIAN Qi-hu(Beijing Research Center of Engineering Structures and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Engineering Institute of Cops of Engineers,PLA University of Science and Technology,Nanjing 210007,China)

机构地区：[1]北京建筑工程学院北京市工程结构与新材料工程研究中心,北京100044 [2]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《宁波大学学报（理工版）》2012年第1期41-47,共7页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：Supported by the National Natural Science Foundation of China(11032001,51174012,50825403);Russian Foundation for Basic Research(11-01-91217);"973"Key State Research Program(010CB732003);The Innovation School Foundation(51021001);Beijing Natural Science Foundation(KZ200810016007);Scientific School of Modeling and Analysis of Nonlinear Systems(PHR201107123)

摘　　要：岩体具有复杂的内部结构,内部结构对于岩土的力学性质具有决定性的影响.文章从岩体结构层次的角度研究了岩体的动力变形与破坏过程,在松弛模型的框架内研究了变形破坏的空间尺度与应变率之间的关系.讨论了裂纹传播速度与荷载强度之间的关系,研究了岩体变形破坏的层次特性.最后从岩体结构层次角度研究了岩体的破坏准则.研究表明:岩体的动力变形与破坏具有层次特性,这一层次特性依赖于外载的空间与时间特性、岩体的结构层次和岩体变形与破坏过程速度的有限性.时间准则与极限变形准则可以较好地描述岩体的动力破坏.Dynamic deformation and fracture process of rock mass are investigated from the perspective of structural hierarchy. The relationship between spatial scales of deformation and fracture with strain rate is explored in the framework of relaxation model. The velocity of crack propagation in dependence on loading intensity is discussed, and the hierarchic nature of deformation and fracture are examined. At last the fracture criteria are discussed from the aspects concerning structural hierarchy of rock mass. The investigation shows that dynamic deformation and fracture process of rock mass possess hierarchic nature which depends on the spatial and temporal characteristics of external loading, structural hierarchy of rock mass and finiteness of the velocity of the fracture process. The temporal criterion and limit strain criterion may serve as fracture criteria adequately well.

关 键 词：内部结构层次 岩体 动力变形与破坏 层次特性 

分 类 号：TU452[建筑科学—岩土工程]