An Approach for Quantifying the Influence of Seepage Dissolution on Seismic Performance of Concrete Dams

Many concrete dams seriously suffer from long-term seepage dissolution, and the induced mechanical property deterioration of may significantly affect structural performance, especially seismic safety. An approach is presented in this paper to quantify influence dissolution on performance dams. To connect laboratory test with numerical simulation, tests are conducted for specimens using cumulative relative leached calcium as an aging index, a model established predict first step. A coupled seepage-calcium dissolution-migration containing two calculation modes proposed simulate spatially non-uniform Based simulated state roller compacted dam subjected 100 years responses subsequently analyzed. During which nonlinear cracking concrete, radiation damping far-field foundation considered. Research results show that will weaken safety because dissolution-induced decrease effective thickness body. The upstream surface, toe gallery wall large degree whereas it minimal basically same inside body, at 0.19% within years. horizontal displacements crest under design static load fortification against earthquake increase by 6.9% 21.9%, respectively, leads failure anti-seepage system. This study can provide engineers reference basis reinforcement decision old