FE MODELING AND NUMERICAL SIMULATION FOR DYNAMIC ANALYSIS OF GRAVITY DAM SPILLWAYS

摘要

Concerns about the seismic safety of concrete dams have been growing during recent years. Seismic design concepts in use, at the time most existing dams were built, were inadequate. To account for the analytical and design uncertainties, a large factor of safety has been used in the design of many dams. But this has not necessarily ensured a safe and efficient design. Results obtained from computational mathematical modeling are just as reliable as the credibility of the underlying assumptions. Model testing of scaled prototypes can provide some understanding of structural behaviour, but it has many limitations as far as dynamic testing of dam models is concerned. Thus, sufficient degree of acceptability needs to achieved by simulating realistic conditions by numerical modeling. This paper tries to address such issues by simulating realistic conditions for seismic analysis of gravity dams.