| Taking the cooling tower of a thermal power plant in Anshan,Liaoning Province as the research background,and the finite element software ABAQUS is taken as the analysis platform,the analysis model is established and the seismic response analysis is carried out.The main work of this paper is as follows:(1)The finite element analysis model of the cooling tower structure was established with ABAQUS.The reliability of the model was validated by the analysis of the dynamic characteristics and the results of the structural test report.(2)The basic principle and analysis process of the incremental dynamic time history analysis method are expounded.The seismic fragility analysis procedure of the structure is summarized,and the overall vulnerability of the structure is evaluated.(3)Using regional division method,the cooling tower structure is divided into different regions.The seismic response of each area under earthquake action is discussed and the regional vulnerability curve of each part is obtained.By comparing the damage probability,the weakest part of the structure is obtained.(4)Different retrofit methods are adopted to strengthen the structure,and the effects of these methods on the seismic response of the structure are also discussed.The optimal plan is selected out through comparison,so as to give rationalization proposals for design and construction.(5)The finite element model of soil-structure interaction is established.The influence of the soil-structure interaction on the seismic response of the structure is given by different quantitative indexes. |
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