摘要
淮安大桥是宿淮高速公路上的一座大跨度预应力混凝土斜拉桥,其宽度在目前国内同类型桥梁中位居第一。利用ANSYS软件建立了淮安大桥的三维有限元模型,并对其动力特性进行了分析。在此基础上,应用空间非线性时程分析方法,对淮安大桥在不同地震动输入方式下的地震响应进行了计算分析。研究结果表明,淮安大桥主桥关键截面的地震响应在设计允许的范围内,对大跨度预应力混凝土斜拉桥的地震响应分析并采取相应的控制措施具有一定的借鉴意义。
Huai＇ an Bridge is a long-span prestressed concrete cable-stayed bridge built on Suqian-Huai＇ an Expressway. It is the widest one of the same type bridges in China now. With the help of modeling technology by ANSYS software, a three-dimension model of the ＂bridge is established. Based on the model, modal analysis and seismic response under different earthquake input types with spatial nonlinear timehistoric analysis are carried out. Research results show that seismic response of key sections in Huan＇ an Bridge satisfies the requirements of design, and provides reference values for seismic response and control measurements for long-span prestressed concrete cable-stayed bridges.
出处
《工程抗震与加固改造》
2007年第5期103-108,共6页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金资助项目(50378017)
教育部高等学校科技创新工程重大项目培育资金资助项目(704024)
关键词
大跨斜拉桥
预应力混凝土
模态分析
地震响应
时程分析法
long-span cable-stayed bridge
prestressed concrete
modal analysis
seismic response
time-history analysis
