NUMERICAL DETERMINATION OF STRENGTH PARAMETERS OF FRACTURED ROCK MASSES USING FINITE ELEMENT METHOD
YANG Jianping1,CHEN Weizhong1,2,WU Guojun1,DAI Yonghao1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,
Chinese Academy of Sciences,Wuhan,Hubei 430071,China;2. Research Center of Geotechnical and Structural Engineering,
Shandong University,Jinan,Shandong 250061,China)
Abstract:The equivalent strength parameters of fractured rock masses are prerequisite to stability analysis of geotechnical engineering projects constructed in fractured rock masses which are encountered frequently in west China. Based on generated mesh of fractured rock masses,combined with statistic damage constitutive model of intact rock and damage model of structural plane,progressive failure of fractured rock masses is studied using finite element method(FEM). Furthermore,scale effect and anisotropy of compressive strength of fractured rock masses are studied. Study results show that the strength decreases and tends towards stability rapidly from intact rock to fractured rock masses,and the anisotropy of strength of fractured rock masses is not significant. At last,based on numerical simulation conducted on 10 m scale rock masses under different confining pressures,the equivalent strength parameters of fractured rock masses are gained and the results are compared with Hoek-Brown criteria. The method developed is helpful for determination of strength parameters of fractured rock masses.
杨建平1,陈卫忠1,2,伍国军1,戴永浩1. 基于有限元方法的裂隙岩体等效强度参数研究[J]. 岩石力学与工程学报, 2011, 30(S2): 4002-4010.
YANG Jianping1,CHEN Weizhong1,2,WU Guojun1,DAI Yonghao1. NUMERICAL DETERMINATION OF STRENGTH PARAMETERS OF FRACTURED ROCK MASSES USING FINITE ELEMENT METHOD. , 2011, 30(S2): 4002-4010.