Risk evaluation of concrete gravity dams subjected to strong earthquake is one of the key problems of performance-based aseismic design. Risk assessment in view of technology and economy is on the base of decision-making

and countermeasures of aseismic optimization are put forward. By using classification criterion of destroyed degree due to strong earthquakes given by researchers

earthquake hazard and aseismic fragility assessments of dam

aseismic risk model is established; and aseismic countermeasures are analyzed. The Jin’anqiao Concrete Gravity Dam under construction is taken as the example for illustrating the risk assessment. It is shown that the model is basically applicable to risk assessment of concrete gravity dams subjected to earthquakes.