基于TCK模型的非贯通节理岩体动态损伤本构模型

发布时间：2018-06-14 15:12

本文选题：固体力学 + 动态损伤本构模型　；参考：《爆炸与冲击》2016年03期

【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。
[Abstract]:It is proposed that macro and mesoscopic defects should be considered simultaneously in the dynamic damage constitutive model of rock mass, and the calculation formula of macroscopic damage variable (Zhang Liang) considering the geometric and mechanical characteristics of joints is derived based on energy principle and fracture mechanics theory. Based on the composite damage variable (Zhang Liang) and the intact rock dynamic damage Taylor-Chen-Kuszmauln model, a corresponding constitutive model of dynamic damage of jointed rock mass under uniaxial compression is established. The influence of internal friction angle and joint length on dynamic mechanical properties of rock mass is discussed by using this model. The results show that the dynamic peak strength increases with the increase of internal friction angle and decreases with the increase of joint length.
【作者单位】：中国地质大学(北京)工程技术学院;西藏大学工学院;黄淮学院建筑工程学院;北京科技大学土木与环境工程学院;河北承德钢铁公司;
【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)
【分类号】：O346.1

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