Random Earthquake Response And Reliability Analysis Of Super Large Cooling Tower

Hyperbolic cooling-tower is important buildings in power plant, and its safety matters a lot in the production of electric power. With the national economic growth, the demand of electricity of China is increasing. At the same time, with the implement of restructuring the national electric power policy"supporting big generators, shutting down small generators", the capacity of generating units is increasing, the construction scale of the cooling tower size and volume is also growing. Currently, super large cooling towers which are under planning or under construction occur now and then, and their heights exceed 150m that is provided in the"Code for hydraulic design of fossil fuel power plants"and exceed 165m that is provided in the"Code for design of cooling for in dustrial recirculating water". In this paper, seismic response spectrum analysis, structural random seismic response analysis and seismic dynamic response parameters analysis of super large cooling tower are researched.1. Introduced the analyzing method of random seismic response of structure which based on traditional random vibration analysis and pseudo-excitation method.2. Adopting the method of response spectrum analysis, this paper calculated the seismic response of structure under different load effect combination.3. The input of earthquake ground motion is indicated by Duxiuli-Chenhouqun power spectral. The structural dynamic responses are researched under uniform earthquake excitations with the traditional random vibration analysis and pseudo-excitation method, and studied the random seismic response of cooling towers under four different earthquake model input, and compared the results of response spectrum analysis and stationary random seismic response analysis.4. Based on stochastic vibration theory, this paper analyzed the seismic dynamical reliability, which provided an important theoretical reference for improving seismic design method.5. The paper analyzed in detail the influence of the structural elastic modulus, seismic model, seismic ground motion models and the number and nature of modes on random dynamic response of super large cooling tower, which provided an important reference for seismic design and analysis of super large cooling tower.