Effect of Foundation-Reservoir Interaction on Seismic Response of Concrete Gravity Dam

摘要

Effect of foundation-reservoir interaction on seismic response of concrete gravity darn is investigated considering Bichom Dam located in Arunachal Pradesh, India. Seismic analysis is carried out for two earthquake excitations (DBE and MCE) assuming linear behaviour. Time period, crest displacement, base reactions and stress distributions of dam are discussed herein. The darn with rigid foundation subjected DBE excitation is safe except some minor cracks at the heel, but the dam with flexible foundation suffers moderate damage when the reservoir is empty and full. The dam subjected MCE excitation experiences serious cracks at heel and toe of the dam.