Abstract
The sliding wedge method and the finite element rigid body limit equilibrium method are combined to analyze the dynamic stability of shapai arch dam affected by wenchuan earthquake, and compared with the pseudo-static method. Analysis indicates that the result got by the sliding wedge method and the finite element rigid body limit equilibrium method is slightly higher than the pseudo-static method of safety coefficient. Because the changes in the size and direction of the arch abutment thrust are taken into account in the sliding wedge method and the finite element rigid body limit equilibrium method, and coincidence coefficient is considered during applying seismic inertia force. So the method referred by this paper can reflect the aseismatic working state of the arch dam. Therefore, it provides a novel means of evaluating aseismatic safety.
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