首页|Modeling time-dependent mechanical behavior of hard rock considering excavation-induced damage and complex 3D stress states
Modeling time-dependent mechanical behavior of hard rock considering excavation-induced damage and complex 3D stress states
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
To investigate the long-term stability of deep rocks,a three-dimensional(3D)time-dependent model that accounts for excavation-induced damage and complex stress state is developed.This model com-prises three main components:a 3D viscoplastic isotropic constitutive relation that considers excavation damage and complex stress state,a quantitative relationship between critical irreversible deformation and complex stress state,and evolution characteristics of strength parameters.The proposed model is implemented in a self-developed numerical code,i.e.CASRock.The reliability of the model is validated through experiments.It is indicated that the time-dependent fracturing potential index(ξTFPI)at a given time during the attenuation creep stage shows a negative correlation with the extent of excavation-induced damage.The time-dependent fracturing process of rock demonstrates a distinct interval effect of the intermediate principal stress,thereby highlighting the 3D stress-dependent characteristic of the model.Finally,the influence of excavation-induced damage and intermediate principal stress on the time-dependent fracturing characteristics of the surrounding rocks around the tunnel is discussed.
Hard rockExcavation damageComplex stress stateThree-dimensional(3D)time-dependentmodel
Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Yangtze River Scientific Research Institute,Wuhan,430010,China
State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China
University of Chinese Academy of Sciences,Beijing,100049,China
Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences,Potsdam,Germany
展开 >
National Natural Science Foundation of ChinaChina Postdoctoral Science FoundationFundamental Research Funds for Central Public Welfare Research Institutes of China
万方数据
维普
