Damage analysis of concrete gravity dam under earthquake load

In order to deeply research the mechanics theory of concrete gravity dam into the nonlinear state and the damage failure under the earthquake force,the artide analyzed the damage failure mechanics of the concrete gravity dam and the damage region under earthquake load of x,y direction,numerically simulated the damage phenomena by finite element software,and monitored changes of principal stress of the nodes which were near the damage region.The results show that it is easy to occur damage phenomena at stress concentration regions,such as dam heel,dam toe and dam cervical downstream.The principal stress has changed with the changes of earthquake acceleration time histories,the larger the amplitude of earthquake acceleration,the higher the level of tensile stress.It is easy to reach the tensile strength,then occur the damage phenomena.The damage mechanism of the concrete gravity dam under the earthquake load was revealed,witch can provide theoretical basis for design and construction of concrete gravity dam.