Abstract：The three-dimensional finite element analysis of anisotropic brittle dynamic damage mechanism for gravity dam and rock foundation subjected to the blast-impact load has been carried out. The concepts of effective stress and damage strain energy release rate have been taken into account to develop the dynamic damage evolution model，which is employed to develop the three-dimensional anisotropic dynamic damage finite element program. The processes of dynamic response including the fields of displacements，stresses，damage state，strain energy release rates as well as failure situation in the dam under the blast-impact load have been simulated and presented by three-dimensional counter graphics and animations. The analytical results can provide a useful method to improve the further studies.
