The Dynamic Characteristics Study On Jin'anqiao RCC Gravity Dam

Now with the rapid development of water conservation, some high RCC gravity dams will be constructed in southwest and northwest regions with plentiful water resources and frequent earthquake. 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 in this paper, in order to study the dynamical characteristics and anti-seismic safety of four dam sections of Jin'anqiao RCC, the results of the FEM analysis and the failure tests on dynamic model were combined. The main works of this paper are as follows:1. In this paper, the characterisitics and component of the material were given. The design and analysis of the model material experiment were also described. Introduce the simulation theory and deign of the model dam sections.2. The shaking table model tests of dam section of sand-draining section, power section, water retaining section and overflow section were described in the 4 chapter.The influences of hydrostatic pressure and rolled bedding fault were considered for the tests. The position of dynamic failure and anti-seismic ability were evaluated in this paper.3. The water retaining section of the Jin'anqiao RCC gravity dam is analyzed 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 planar 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.