城市混凝土曲線梁橋地震易損性的調查與分析
[Abstract]:In recent years, because of the frequent occurrence of earthquakes, people pay more and more attention to the safety of lifeline engineering. As the core of lifeline engineering, bridge engineering is the first research object of experts and scholars. These studies represent the vulnerability of bridge structures in the form of seismic vulnerability curves and describe the relationship between bridge damage probability and ground motion parameters. On the basis of summarizing the existing research results and methods, combined with the investigation results of urban concrete curved girder bridges in Fuzhou, the representative reference bridges are selected to analyze the seismic vulnerability of the most vulnerable components in the reference bridges. The system vulnerability curve is obtained. In general, the following aspects of the work are mainly carried out, and the corresponding results have been obtained. 1. Through the collection and browsing of domestic and foreign literature, the earthquake damage of beam bridges is briefly introduced. A systematic review and summary of vulnerability analysis methods, damage criteria and indicators of components, which provides a theoretical basis for the determination of bridge damage index and the establishment of vulnerability curve. 2. With the help of SAP2000, a large scale universal finite element software, Combined with the investigation of curved girder bridge in Fuzhou and the arrangement of literature, the representative reference bridge is selected, and the spatial finite element analysis model is established. 3. The nonlinear time history analysis of curved beam bridge is carried out by using incremental dynamic analysis method. The seismic responses of structures under different ground motions are obtained. Through statistical regression, the vulnerability curve of each independent component is obtained by using Origin software, and the most vulnerable component and its location are determined. Through parameter analysis, the variation trend of structural seismic response of curved beam bridge under the change of main structural parameters is studied. The influence of the radius of curvature, the height of the pier and the arrangement of the support on the vulnerability of the structure is analyzed, and the certain rules are obtained, which provide a certain theoretical basis for the design and maintenance of the bridge in the future. Finally, the shortcomings of the research are briefly explained and discussed, and some suggestions for further work are put forward.
【學位授予單位】:福州大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:U442.55
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