The Static And Dynamic Characteristics Study On RCC Gravity Dam

In this thesis, the dynamic characteristics and the seismic response o f overflow section of gravity dam are studied by FEM. The distribution laws of seismic displacements and stresses in overflow section of gravity dam are analyzed.In theories, the relative theories about dynamic are introduced concisely, including basic conceptions in the dynamic analyze, the dynamic equations of multi-freedom and solution for them. The response of spectrum is introduced.The special questions about gravity dam in dynamic analysis are studied; how to select the model in finite element analysis; the coupling libration of water and dam; the effect between groundsill and dam. Especially, the author researches the coupling libration of water and dam detailedly.In practice, the water retaining section of the Mian'huatan RCC gravity dam is analyzed by the software ANSYS in 5th chapter. Static analysis is used in both empty reservoir and full reservoir situation, in order to get the distributing of the stress and the displacement. Modal analysis and spectrum analysis are applied to research the dynamic characteristics, and the distribution laws of seismic displacements and stress of water retaining section are analyzed. At last, based on the three-dimensional model's transient analysis is carried out to calculate the displacement and stress under the earthquake load and research the dam's dynamic crack.All of work of this paper is combined with the practical project and the research conclusions provide the practical reference to the design of similar projects. At last, after drawing the conclusion of the work of the paper, the expectation of advanced research is put forward.