A Study On Anti-seismic Optimization Of Concrete Gravity Dam Bascd On ANSYS

As a kind of clean energy, hydropower is not only environmentally friendly, but also renewable, its development and utilization is of great significance. Hydropower development is indispensable to the construction of dams. As a kind of water retaining structure, gravity dam has been widely used in construction because it has many advantages, it is safe and reliable, the topography and geology adaptability is strong, and its construction is convenient.China is a country with frequent earthquake, once an earthquake take place in the area of gravity dam, will lead to disastrous consequences, so the seismic safety research of gravity dam is very necessary. The structure optimal design has a great significance, because the structure optimal design can bring us considerable economic benefits. To optimize the design of gravity dam section and comparing the stress before and after the optimization under static load and the seismic dynamic load has a great realistic engineering significance. This article uses the finite element method to calculate the stress of gravity dam, and uses the response spectrum method to calculate the seismic response of gravity dam.ANSYS is a large universal finite element software, it includes pretreatment module, analysis and solving module and post-processing module. ANSYS can be used in the static and dynamic analysis of structures. What’s more, ANSYS has optimization module, making a programming by APDL language can optimize the structure design.This article uses the ANSYS finite element software for the gravity dam to process the static analysis, obtaining the distribution of stress and displacement of the gravity dam under static load. And based on ANSYS, this paper proceed modal analysis and spectrum analysis of the gravity dam, working out the natural frequency of the gravity dam with the empty library model and full library model, stress and displacement distribution under the vertical and horizontal earthquake. Finally, the paper uses ANSYS optimizing technique to optimize the design of gravity dam section by APDL language.The calculation results show that:The result of the first-order method used to optimize the dam is better than the zero-order method. By comparing some indicators of the cross-section before and after the optimization, we can know that the optimal design not only reduces the cross-sectional area of the gravity dam, improving the economy of the design, but the safety and the anti-seismic capacity of the dam also has been improved.