Seismic response of concrete gravity dams under near field and far field ground motions

摘要: Abstract Near field ground motions trigger higher damage to the structures due presence of distinct velocity pulses which are absent in far motions. The present study deals with time history analysis dam-reservoir-foundation coupled system using finite element technique under near and Koyna dam, is a concrete gravity taken as case for investigation. Six motions, recorded ruptured fault selected Whereas, six other at stations located away from plane, same earthquake events, considered Along comparative seismic response qualitative assessment performance dam also evaluated. results obtained demonstrate different impact on dams. Further, ascertain importance selection safety