Static And Dynamic Analysis For Safety Evaluation Of Water Intake Tower Of Kensiwate

China is a multi-earthquake country, and many water conservancy project built in the danger zone in high intensity. Especially after "5.12" Wenchuan earthquake, The seismic problem of intake tower in water conservancy project which is being construction or has been built has attract more attention in engineering field, so it is essential to evaluate the safety of intake tower by static and dynamic analysis.This article used the method of finite element and the intake tower of Kensiwart water conservancy project is chosen as the research object, the main work is as follows:(1) Analysis the situation,progress and research methods of shore tower intake tower.(2) Based on the design drawings files and related information, three-dimensional finite element model is being established; Five typical static condition is being studied. The result of stress and displacement distribution is being analysis for stability evaluation.(3) Modal analysis, seismic response spectrum analysis and time history analysis are executed for the structure under the seismic loading; the safety evaluation is getting by comparative analysis of the corresponding results.(4) The intake tower structure vibration characteristics is being studied by added mass theory, the analysis results is being contrast with the analysis results of anhydrous conditions, and getting the safety evaluation by checking the corresponding results.(5) The intake tower model is being dynamic analyzed by using power spectral density method, and the safety evaluation is carries on the appraisal to the intake tower from the angle of probability.By the analysis study work in the full text, we draw the following conclusions:(1) In the five typical conditions, horizontal displacement of structural is small but the changes of different conditions is large, the vertical displacement is larger than the horizontal displacement, all the performance meet the safety requirements. At the normal water level, when the emergency gate is closed, the local first principal stress and the third principal stress at Gate slot is bigger, the concrete tensile strength can not meet the requirements, which needs to be improvement by local reinforcement.(2) The maximum tensile stress of structure is large in both vertical flow direction seismic excitation and flow direction seismic excitation in response spectrum analysis, so enhancement processing is needed for the structure.(3) The specific time-history seismic response analysis and response spectrum analysis results are in good agreement, indicating that both the calculation method is reliable.(4) In aqueous vibration conditions, the displacement and stress of the structure is increasing. So in considering the effect of hydrodynamic pressure conditions, the structure must be reinforced.(5) The probability of cracking of the structure under the earthquake load is relatively large, so it must be reinforced the structure or take some reinforcement treatment measures, to ensure that the structure does not collapse under strong earthquakes.(6) The results of acceleration autocorrelation of PSD spectrum clearly shows the vibration frequency which participated in the vibration, which is better than the velocity PSD spectrum and the displacement PSD spectrum, and it can be used for the detection of containing vibration frequency in structure.According to the analysis and evaluation of Kensiwart spillway tunnel intake tower static and dynamic.The research methods we used can provide a reference for the survey units、design units and construction units. It can be used for providing a reference for something like the seismic stability design,verification,prediction of spillway tunnel intake tower structure.