The Probabilistic Seismic Evaluation And Damping Control Of The Long Span CFST Arch Bridge

As we all know, bridges are the very important structures in the highway system.However, owing to the therefore low design criteria and the neglect of bridgeearthquake-resistance, in our country, the seismic capacity of many constructed bridges isnot strong. So the study on the seismic capacity of bridge structure is very necessary.While scholars all over the world increasingly focused on performing a seismic riskanalysis, they think that method is a very useful method to estimate the seismic capacityof bridge structure. To analyze the long span CFST arch bridge seismic vulnerability, thisthesis according to the project of Natural Science Foundation of China has done someresearch as follows:According to the drawing of bridge construction, establish the finite element model ofthe bridge by use the finite element analysis software SAP2000. And we analyzed thestructural dynamic characteristics of the bridge. Two kinds of effective isolation scheme isproposed on the basis of the original structure, Choose EI-Centro wave as the input ofdeterministic seismic, for dynamic elastic-plastic time history analysis of the originalstructure and isolation scheme.Seismic vulnerability analysis and seismic performance probability evaluation hasbeen research by using the theory of based on the probability of bridge seismic evaluationand finite element model of the bridge and establish the vulnerability curves of the archbridge. Seismic vulnerability analysis and seismic performance probability evaluation oftwo kinds of isolation scheme in the mentioned has been research and establish thevulnerability curves of the corresponding structure. Take isolation measures can improvethe seismic performance under the great earthquake of the bridge after compared seismicperformance of two kinds of isolation scheme with the original structure.