Earthquake-Resistance Safety Estimation of Guanmaozhou Composite Dam with Asphalt Concrete Core Wall

According to the actual engineering conditions of Guanmaozhou Hydropower Station in Sichuan China, the 3-D non-linear FEM dynamic model of the dam with asphalt concrete core wall has been built. By emulating the process of the dam´s filling and reservoir´s impounding, the initial stress field of dam body is obtained firstly under the normal water level. Then by inputting the acceleration curve of design earthquake, the earthquake response of the dam is obtained by the dynamic method, including acceleration response, displacement response and stress response etc. And the earthquake resistance of the dam is analyzed and estimated according to calculation results of earthquake response. It is shown that the earthquake response of the dam is consistence with the general law. The acceleration response in the up-downstream direction is the maximum, the one along the dam axis is second, and the one in vertical direction is the minimum. In the aforesaid three directions, the magnification coefficients are 1.16, 1.10 and 1.06 respectively. The safety factor of each element of dam is larger than 1.0 during earthquake period. The dam can satisfy the seismic resistance request and the design of the dam is reasonable in technique.