A PRACTICAL ELASTO-BRITTLE-PLASTIC MODEL BASED ON H-B CRITERION AND ITS APPLICATION TO A COUPLING ANALYSIS
A practical elasto-brittle-plastic constitutive model based on H-B criterion which can simulate both pre-peak damage and post-peak damage characteristics of rock mass was proposed.Pre-peak behavior was simulated by assuming different elastic constants which were expressed in terms of confining pressure in each damage level and brittle plasticity which can consider softening property was used to simulate post-peak behavior of rock mass.All parameters needed in H-B criterion for both in pre-peak and post-peak stage of the model were obtained by making regression analysis with data get from triaxial compression experiment under high confining pressure and hydraulic pressure.Then based on Biots theory,this model was applied to analysis the deep-lying diversion tunnel of Jinping Hydropower Station under water table,and the numerical results can show the regions of plastic zones and changes of permeability in the excavation disturbed zone during construction which matched some in-situ experiment observations.
elasto-brittle-plastic constitutive model damage level Hoek-Brown criterion coupling analysis
Z.Q.Liu Q.Zhang W.L.Chen
Department of Engineering Mechanics,Hohai University,Nanjing,Jiangsu 210098,China
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
1043-1047
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）