岩土工程学报Issue(10)：1814-1821,8.DOI:10.11779/CJGE201410008
基于组合模型法的贯通节理岩体动态损伤本构模型
Dynamic damage constitutive model for persistent jointed rock mass based on combination model method
摘要
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 include the tensile or shear failure of the intact rock, the shear failure along the joint face and the mixed one of the above two ones with the joint dip angle, and accordingly the uniaxial compression dynamic climax strength of the jointed rock mass greatly varies with it.关键词
贯通节理岩体/动态损伤本构模型/节理剪切强度/组合模型法/黏性元件Key words
persistent jointed rock mass/dynamic damage constitutive model/joint shear strength/combination model method/viscous component分类
建筑与水利引用本文复制引用
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,(10):1814-1821,8.基金项目
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资金项目 （）
