Dynamic damage constitutive model for persistent jointed rock mass based on combination model method
LIU Hong-yan1, 2, 3, LÜ Shu-ran4, ZHANG Li-min5, 6
1. College of Engineering & Technology, China University of Geoseiences (Beijing), Beijing 100083, China; 2. School of Engineering, Tibet University, Lasa 850000, China; 3. Key Laboratory on Deep GeoDrilling Technology, Ministry of Land and Resources, Beijing 100083, China; 4. School of Safety and Environment Engineering, Capital University of Economics and Business, Beijing 100026, China; 5. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China; 6. Hebei Chengde Iron and Steel Corporation, Chengde 067002, China
Abstract：According to the dynamic deformation characteristics of the persistent jointed rock mass and the relevant results of the existing rock dynamic constitutive models, the dynamic stress of the persistent jointed rock mass is regarded as the summation of two components, which are the static stress and the dynamic stress components respectively. The static stress component of the persistent jointed rock mass is simulated using three basic deformation components connecting in series such as the nonlinear component reflecting the rock mesoscopic damage, joint closure and shear deformation components. The dynamic stress component is simulated using the viscous component. Then the uniaxial dynamic compression damage constitutive model is set up. Next, according to the fact that the persistent jointed rock mass often shears to fail along the joint face under the uniaxial load, the joint shear failure criterion is introduced into the damage constitutive model established above to revise it, which can perfectly consider the effect of the joint shear strength on this model, and the uniaxial compression damage constitutive model of persistent jointed rock mass considering the joint shear strength is established finally. Then this model is adopted to calculate the mechanical properties of the persistent jointed rock mass under compression load, and the effect law of the joint dip angle on the rock mass uniaxial compression dynamic climax strength is especially discussed. The results show that the failure modes of the jointed rock mass
刘红岩, 吕淑然, 张力民. 基于组合模型法的贯通节理岩体动态损伤本构模型[J]. 岩土工程学报, 2014, 36(10): 1814-1821.
LIU Hong-yan, LÜ Shu-ran, ZHANG Li-min. Dynamic damage constitutive model for persistent jointed rock mass based on combination model method. Chinese J. Geot. Eng., 2014, 36(10): 1814-1821.
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