RCC gravity dam with incised transverse joint is a whole structure approximately due to joint effect of incised transverse joint. When RCC gravity dam encounters strong earthquake

aseismic safety of dam is mutative with different cracked degrees. During aseismic analysis by using FEM

considering structure characteristic of tru-cut transverse joint

joined mesh and incised mesh of incised transverse joint can be simulated by living mesh and killed mesh; and cracked degree can be equaled to discount elasticity moduli of the whole joined mesh of incised transverse joint. In the end

the aseismic safety of left bank dam monoliths of Jinanqiao Hydropower Station using above methods are analyzed. The results indicate while left bank dam monoliths of Jinaoqiao Hydropower Station encounters M9 earthquake

cracking of incised transverse joint has little influence on aseismic safety of individual dam monolith and dam monolith

and dam is safe. This indicates Jinanqiao Hydropower Station RCC gravity dam can withstand the design earthquake with the reasonable design.