NONLINEAR CREEP DAMAGE MODEL OF ENGINEERED ROCK AND ITS APPLICATION
WU Guojun，CHEN Weizhong，CAO Junjie，TAN Xianjun
(State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Abstract：Aiming at the shortcomings of component creep models，such as linear constitutive relationships，converging easily and entering accelerative stage too quickly，a new empirical nonlinear damage viscoelasto- plastic model which can reflect rock creep damage effect is put forward based on creep experiments. The model is verified to be correct by means of simulating a uniaxial compression numerical test which makes use of user¢s subroutines of ABAQUS. Finally，the model is applied to simulating the whole construction process of Dagangshan underground powerhouse under two working conditions，with and without considering damage factor，respectively. By comparing the results two working conditions，it is demonstrated that the results of considering damage factor working condition can bring forward more reasonable reference than that of without considering damage factor，especially in plastic zone，damage degree and deformation of rock mass.
伍国军，陈卫忠，曹俊杰，谭贤君. 工程岩体非线性蠕变损伤力学模型及其应用[J]. 岩石力学与工程学报, 2010, 29(06): 1184-1191.
WU Guojun，CHEN Weizhong，CAO Junjie，TAN Xianjun. NONLINEAR CREEP DAMAGE MODEL OF ENGINEERED ROCK AND ITS APPLICATION. , 2010, 29(06): 1184-1191.
