Arch dam damage prediction method and device

Abstract

The invention discloses an arch dam damage prediction method and device. The method comprises the following steps of determining displacement values of mountains on the two banks of an arch dam according to monitoring data, wherein the displacement values represent valley width deformation of the two banks of the arch dam; establishing an original finite element model of the arch dam-foundation, and calculating node counterforce of a foundation model node of the original finite element model according to the displacement value and a preset static load, with the node counterforce being used forrepresenting a force borne by the foundation model node under the displacement value and the preset static load; calculating the arch dam stress of the original finite element model under the node counterforce and the seismic load; obtaining damage distribution of the arch dam under the action of node counterforce and earthquake load according to the stress of the arch dam. The foundation displacement constraint condition caused by valley deformation is converted into the foundation node counterforce, and then the arch dam damage is predicted according to the foundation node counterforce andthe seismic load, so that the effect of predicting the damage distribution of the arch dam under the combined action of the valley deformation and the seismic load at the same time is achieved.

Description

Technical field [0001] The present disclosure relates to the field of water conservancy and hydropower engineering, and in particular to an arch dam damage prediction method and device. Background technique [0002] An arch dam is a dam built in a canyon. It is made into a horizontal arch with a convex side facing upstream, and the two ends are close to the space shell structure of the canyon wall, playing the function of holding water. With more and more arch dam constructions, the safe operation of arch dams has also become a goal of people's attention. [0003] In the prior art, the arch dam-foundation stress analysis system is usually used. In this system, the seismic load is applied to the foundation in the form of force to cut off the artificial boundary, and then the stress response of the arch dam-foundation system is calculated through the wave equation to predict the arch Damage distribution of the dam under the action of earthquake load. [0004] However, during the oper...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present disclosure provides a damage prediction method and device for an arch dam to solve the problem in the prior art that the damage distribution of an arch dam under the joint action of valley amplitude deformation and seismic load cannot be predicted

Images