IMPROVED CONSTITUTIVE RELATION OF ROCK MASS BASED ON TWO-PARAMETER NEGATIVE EXPONENTIAL DISTRIBUTION
(1. Key Laboratory of Engineering Geomechanics，Institute of Geology and Geophysics，Chinese Academy of Sciences，
Beijing 100029，China；2. State Key Laboratory of Geomechanics and Deep Underground Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China)
Abstract：The functional relationship between discontinuity occurrence and ground stress is established. This improved constitutive relation can quantify the anisotropic property of rock mass mechanics which is controlled by the discontinuity occurrence and ground stress direction by introducing surplus shear stress ratio h. The research results show that when the direction of ground stress changes，the value of h will change accordingly and further lead the curve of stress-strain of rock mass to alter at the same time. Based on this improved constitutive model of rock mass，the stress-strain curves of rock mass of Xiaowan hydropower station foundation in Yunnan Province are calculated；and the anisotropic characteristics of rock mass under different stresses are revealed.
胡秀宏1，2，伍法权1，孙 强2. 基于双参负指数分布的改进的岩体本构关系[J]. 岩石力学与工程学报, 2010, 29(S2): 3455-3462.
HU Xiuhong1，2，WU Faquan1，SUN Qiang2. IMPROVED CONSTITUTIVE RELATION OF ROCK MASS BASED ON TWO-PARAMETER NEGATIVE EXPONENTIAL DISTRIBUTION. , 2010, 29(S2): 3455-3462.
2010, Vol. 29 
