基于TCK模型的非贯通节理岩体动态损伤本构模型  

Dynamic damage constitutive model for rock mass with non-persistent joints based on the TCK model

作　　者：刘红岩[1,2] 杨艳[3] 李俊峰[1] 张力民[4,5] 

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083 [2]西藏大学工学院,西藏拉萨850000 [3]黄淮学院建筑工程学院,河南驻马店463000 [4]北京科技大学土木与环境工程学院,北京100083 [5]河北承德钢铁公司,河北承德067000

出　　处：《爆炸与冲击》2016年第3期319-325,共7页Explosion and Shock Waves

基　　金：国家自然科学基金项目(41002113,41162009);中央高校基本科研业务费专项基金项目(2652014019,2652015263)

摘　　要：提出在岩体动态损伤本构模型中应同时考虑宏、细观缺陷;基于能量原理和断裂力学理论推导得出了同时考虑节理几何及力学特征的宏观损伤变量(张量)的计算公式;基于综合考虑宏、细观缺陷的复合损伤变量(张量)及完整岩石动态损伤Taylor-Chen-Kuszmaul(TCK)模型,建立了相应的单轴压缩下节理岩体动态损伤本构模型;利用该模型讨论了节理内摩擦角及节理长度对岩体动态力学特性的影响规律。研究表明,试件动态峰值强度随着节理内摩擦角的增大而增大,随着节理长度的增加而减小。This paper proposes that both macroscopic and mesoscopic flaws should be considered in the dynamic damage constitutive model for the jointed rock mass. Firstly, the calculation formula of the macroscopic damage variable （tensor） of the jointed rock mass is deduced based on the energy princi- ple and the fracture mechanics theory so that the geometrical and mechanical parameters can be con- sidered at the same time. Secondly, the compound damage variable （tensor） including both macro- scopic and mesoscopic flaws and the Taylor-Chen-Kuszmaul model （TCK） for the intact rock are a- dopted to establish the corresponding dynamic damage constitutive model for the jointed rock mass under uniaxial compression. Finally, the effect law of the joint internal friction angle and the joint length on rock mass＇s dynamic mechanical property is examined with this model. The results show that the dynamic climax strength of the samples increases and decreases respectively with the increase of the joint internal friction and the joint length.

关 键 词：固体力学 动态损伤本构模型 非贯通节理岩体 宏观缺陷 细观缺陷 损伤耦合 应力强度因子 

分 类 号：O341[理学—固体力学]