Dam-Reservoir-Foundation Interaction Effects on Nonlinear Seismic Behavior of Concrete Gravity Dams Using Damage Mechanics Approach

摘要

The nonlinear seismic behavior of concrete gravity dams is investigated considering the effect of dam-reservoir-foundation interaction. An anisotropic damage mechanics approach based on a nonlinear fracture mechanics crack propagation criterion is used to study the seismic response of concrete gravity dams. The dam-reservoir dynamic interaction in the time domain analysis is included using the staggered displacement solution method. Effects of massed foundation and its far-end energy absorption compared with rigid and massless foundation. The Pine Flat dam is chosen as a case study to examine the capability of the proposed model. The obtained results reveal that considering mass of the foundation decreases cracking profiles significantly.