Global Analysis Of Static And Seismic Response For The Concrete Gravity Dam And Factory Building At Dam Toe

Now with the rapid development of water conservation and concrete dam technology, many height dams and large reservoirs will be constructed in southwest and northwest regions with plentiful water resource, and the gravity dam and factory building at dam toe are often choosed, at the same time those regions has frequent earthquake because of the geologic structure. It is endanger the industrial and agricultural production, the safety of people's life and property in the large regions of downstream under the high intensity seismic action. So it's very significant that numerical analysis the response of the seismic action for the concrete gravity dam and factory building at dam toe. This paper base on an hydro-power station, use the method of static and dynamic 3-D finite element analysis, calculate the stress and displacement response of concrete dam and it's factory building under two kinds of load characteristic. The main works of this paper are as follows:1. According to reading the domestic and international literatures, summarized the development actuality of concrete gravity dam, introduced the relative theories and methods of dynamical analysis and the research actuality of gravity dam and hydro-power station factory.2. By using finite element software ANSYS, based on an hydro-power station, the holistic 3-D finite element simulation model of dam, back pipe, and factory building was built, to calculate the stress and displacement of structure under two kinds of load characteristic, and gain the maximal stress and displacement of dam, back pipe, and factory building.3. Through self-vibration character analysis of the separate and holistic 3-D finite element simulation model, the self-vibration frequencies and mode shapes of structure ware calculated. Based on the results, the seismic response action spectrum method was given to the three models. The results shows that the holistic model was much more difficult than separate model in model building, element meshing and calculating, but it was complex conform to reality and it can also reflect the interaction of dam and factory building. The holistic model was analyzed by dynamic time-history theory, compared with the result of seismic response action spectrum method, the advantages and disadvantages of the two methods are studied.4. According to the norms, the generator units forced vibration frequencies were calculated, the Operation of the units might appear of oscillator focus and frequency were analyzed, and on the whether resonance checked. Consider the impact of generator unit vibration of structure, the maximal stress and displacement of structure were calculated to direct the choice of units and the design.5. According to the static and seismic response analysis of gravity dam and factory building, the safety and reliability of design were comprehensive evaluated.Now, the holistic seismic analysis about interaction of dam and factory building is rarely researched. This paper does a useful attempt and gets some conclusions and understandings which have reference value.