基于TCK模型的非贯通节理岩体动态损伤本构模型

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。

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

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 principle and the fracture mechanics theory so that the geometrical and mechanical parameters can be considered at the same time. Secondly, the compound damage variable (tensor) including both macroscopic and mesoscopic flaws and the Taylor-Chen-Kuszmaul model (TCK) for the intact rock are adopted 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.