Earthquake Direction Effects on Nonlinear Dynamic Response of Concrete Gravity Dams to Seismic Sequences

摘要: In a seismically active region, concrete dam may be subjected to one or more aftershocks within relatively short period of time following the occurrence mainshock. When as-recorded mainshock-aftershock sequences are selected as seismic input evaluate performance dams, horizontal components generally applied along principal structural axes during history analysis. It is important notice that changing orientation with regard will cause quite different dynamic response reinforced building structures. The aim present study examine effects earthquake direction on gravity dams sequences. For this purposes, two incident directions assess maximum demands. Nonlinear analyses dam-reservoir-foundation system conducted investigate effects: 1) single events; 2) sequences; 3) aftershock polarity; and 4) intensity. results indicate can significantly change damage propagation processes dams.