Department of Hydraulic and Hydropower Engineering Tsinghua University Beijing 100084 P.R.China;
Institute of Geology and Geophysics of the Chinese Academy of Sciences Beijing 100029 P.R.China;
Institute of Rock and Soil Mechanics of the Chinese Academy of Sciences Wuhan 430071 P.R.China;
rock and soil materials; geological materials; double-medium; constitutive model; damage;