由壳体理论,经分析简化,拱坝可视作由悬臂梁、水平拱及扭转结构所组成.在分析这些结构体系的效应时,将拱坝分解为一系列悬臂梁与水平拱,悬臂梁视作由水平拱所提供的弹性地基梁.考虑径向及扭转作用,用变位法建立悬臂梁各支承节点的平衡方程,求解节点变位,从而求得相应的抗力以及这些结构体系所分配的荷载,然后计算拱坝应力. From the shell theory, after analysis, the arch dam can be regarded as being composed of a cantilever beam, a horizontal arch, and a torsion structure. When analyzing the effects of these structural systems, the arch dam is decomposed into a series of cantilever beams and horizontal arches, and the cantilever beams Considered as the elastic foundation beam provided by the horizontal arch. Taking into account the radial and torsion effects, the equilibrium equations of each supporting node of the cantilever beam are established by the displacement method, and the node displacement is solved to obtain the corresponding resistance and the distribution of these structural systems. The load is then calculated for the arch dam stress.