Abstract:Finite element method (FEM) is widely used in arch dam stress analysis because it can consider all kinds of complex boundary conditions. By discretizing the dam body into interacting elements and nodes, stress analysis under complex conditions can be carried out. However, finite element method can produce stress concentration, which limits its application. ANSYS analysis software is used to calculate the stress and deformation of a single curved mortar masonry arch dam under various load combinations, and the equivalent stress calculation is carried out. The parametric calculation of the equivalent stress is realized, and the calculation results of the arch beam load sharing method are compared and analyzed, and then the structural safety of the arch dam is analyzed and evaluated.