Based on the geometrical characteristics of arch dam s shape and GA with strong searching ability,an optimal design for a double-curvature arch dam with three circle centers and equal thickness by using the arch-cantilever method.

Based on the arch-cantilever method, the stability of arch ring and cantilever beam against elastic buckling in arch dams are analyzed with the theory of elastic stability, and the conclusion is drawn that the stability of arch dam against elastic buckling is governed by the top arch ring.

Aimed the shortcomings that the arch-cantilever method can not simulate the foundation truly,so the paper has proposed a simple arch-cantilever method coupled with finite element analysis of foundation,and derived that the displacement and angle of arch beam element node have the relation and coordination with node solid element of dam foundation.

The coupled analysis method of the trial load method and the 3D elasto-viscoplastic block element method is applied to analyze the stress and stability of Dahuashui arch dam.

Based on the basic principle of trial load method,The arch and cantilever s rigidness equation with nonlinear material property is derived.

Based on the basic principles of the trial load method and the straight radial fibre assumption, a complete adjustment method for arch dam analysis is developed.

Now the finite element method can solve the stress analysis problem of such dam, but another main stress analysis method called load distribution method of arches and cantilevers usually ignores the high elastic modulus of the concrete seepage proof plate, and treats the dam as a h.