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对节理岩体等效损伤流变模型进行了初步研究,假设岩石为各向同性体各向同性损伤,节理面的法向和切向损伤不同,分别建立了岩石和节理面流变损伤演变函数。假设材料无损,计算应力采用有效应力,推导了节理岩体等效损伤流变模型有限元计算公式,编制了相应的有限元程序。算例分析表明,采用的节理岩体等效损伤流变模型是可行的,可较好地反映节理岩体的损伤演变过程。
Equivalent damage rheological model of jointed rock mass is preliminarily studied. Assuming that rock is isotropic damage of isotropic body and normal and tangential damage of joint face are different, the evolution function of rheological damage of rock and joint is established respectively . Assuming that the material is non-destructive, the effective stress is calculated for the calculated stress, and the formula for calculating the equivalent damage rheological model of the jointed rock mass is deduced. The corresponding finite element program is prepared. The case study shows that the equivalent damage rheological model of jointed rock mass is feasible and can well reflect the damage evolution of jointed rock mass.