【作者】 赵军；

【导师】 樊剑；

【作者基本信息】 华中科技大学 ， 结构工程， 2013， 硕士

【摘要】 众所周知，桥梁工程在生命线系统中占据了十分重要的地位。但是，由于以前我国对桥梁结构抗震的重视不够以及设防标准不高，导致我国许多已建成的桥梁结构抗震性能不高。因此，大力开展桥梁结构的抗震性能研究是非常有意义的。世界各国学者越来越关注以地震易损性曲线的形式来表达易损性分析，他们认为这是一种非常有效的评估结构抗震性能的方法。本文依据国家自然科学基金资助项目（51078166），以某大跨度钢管混凝土拱桥结构的地震易损性分析为目标，做了以及几个方面的分析研究工作：根据该大跨度拱桥的施工图，首先运用有限元分析软件SAP2000建立该桥梁的三维空间有限元模型并进行详细的讨论，并且对该桥梁结构的动力特性进行分析。然后在原结构的基础上提出了两种有效的减隔震措施，选择EI-Centro波作为确定性地震输入，对原结构及加设减隔震措施的结构进行弹塑性动力时程分析。利用基于概率的桥梁抗震评价理论与方法对建立的桥梁三维有限元模型进行地震易损性分析并建立该结构的地震易损性曲线，以此结果对该大跨度钢管混凝土拱桥的抗震性能进行概率评价。最后再分别对前面提出的两种加设减隔震措施的结构进行地震易损性分析并建立相应结构的地震易损性曲线，对两种减隔震方案的抗震性能进行概率评价，并将两种减隔震方案的抗震性能与原结构进行对比，结果表明采取相应减隔震措施后能够很好的提高结构在大震作用下的抗震性能。更多还原

【Abstract】 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.更多还原