Static And Dynamic Analysis And Research On Anti-seismic Safety Of Gravity Dam

With the rapid development of water conservation and RCC dam technology. Some high RCC gravity dams will be constructed in southwest and northwest regions with plentiful water resources and frequent earthquake. The adopted design level of earthquake ground motion reachs to nine degrees in these regions. It is very significant that anti-seismic safety for industrial and agricultural production and the safety of the people's life and property in the large region of downstream under high intensity seismic action. Therefore, three dimensional finite element analysis have important significance to deeply study the dynamical characteristics and anti-seismic safety of high RCC gravity dam in high earthquake intensity.In this thesis, describe basic principle and method about dynamic analysis of CFRD in existence comprehensively Basic theory and process of Structure nature vibration analysis and models of spectrum method. Introduce the method of picking-up mode calculate and process of dynamical analysis base on finite element soft ANSYS. And set up Ahai water and electricity station RCC dam with finite element soft ANSYS. Analyze main transmutation and stress distributing. Put forward reasonable and economical joint grouting range of factory and dam.Modal analysis to model use Block Lanczos method. Analyze vibration frequency,vibration period and every step vibration modal of dam, deeply Analyze dynamical characteristics, evaluate security of the dam, dynamical calculate use single response method of vibration modal disassemble method. Analyze dynamical transmutation and dynamical stress, and combine the result of the static stresses and the dynamic stress, evaluate anti-seismic safety of main structure of dam from intensity demand and anti-slide. Analyze influence of combination of the Hydropower house and dam, put forward reasonable and feasible anti-seismic and reinforce measure.All of work of this paper is combined with the practical project and the research conclusion, provide the practical reference to the design and similar projects. At the same time, dynamic response of the high RCC gravity dam is very complex in high earthquake intensity, the problems for further research are pointed out in dynamic analysis.