(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)
Abstract:To simulate the deformation behavior and the stability of rock mass under cyclic loading,the basic idea of subloading surface was presented. Considering the strength characteristics of rock under triaxial compression and under triaxial tension being different,i.e.,the lode angle effect,a corner model was introduced into the traditional Drucker-Prager yield criterion to form a modified Drucker-Prager yield criterion. Based on the yield criterion,a subloading surface model for the rock under cyclic loading based on the theory of subloading surface was proposed. Through the analysis of parameter sensitivity,it was found that three parameters including u,C and of the model had a significant impact on Masing reaction and the ratchet effect of rock. To verify the applicability and validity of the model,a comparison between the simulation and the cyclic loading tests on the model material of rock and basalt was carried out. The results showed that the model described well the dynamic deformation characteristics of rock,indicating that the subloading surface model under cyclic loading was applicable to rock.
刘建峰,徐 进,李青松,等. 循环荷载下岩石阻尼参数测试的试验研究[J]. 岩石力学与工程学报,2010,29(5):1 036-1 041.(LIU Jianfeng,XU Jin,LI Qingsong,et al. Experimental research on damping parameters of rock under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering,2010,29(5):1 036-1 041.(in Chinese))
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