大跨度钢管混凝土拱桥的稳定与振动
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
通过理论研究和数值计算,详细分析了大跨径钢管混凝土双肋拱桥的侧倾稳定性和地震响应。首先,根据双肋拱桥结构在竖向均布荷载作用下的侧倾稳定临界力的近似解析解,讨论了横撑设置、横撑刚度等因素对稳定性的影响。其次,基于多点激振理论和拟静力位移概念,介绍了拱桥结构的动力特点和地震动作用下的响应,并讨论了行波效应的影响。分析表明,地震行波作用对大跨度拱桥影响很大,横撑设置对稳定性敏感。
This paper deals with the lateral buckling analysis and seismic response of the space arch structure, composed of double main arch ribs with transverse braces. Firstly, the elastic critical buckling load of this king of structures is deduced according to the principle of minimum potential energy, the influences of the space length and the stiffness of bracing beams on the lateral stability of structure are studied. Secondly, the seismic response behavior is systematically studied based on the theory of multi-support seismic excitations and the conception of pseudo-static displacement. The numerical result shows that the traveling wave effect has significant influence on the long span arch bridge, the arrangement of bracing beams is sensitive to stability.
引文
[1]项海帆,刘光栋.拱结构的稳定与振动眼M演.北京:人民交通出版社,1991.
    [2]赖泉水.三山西大桥主桥设计简介眼J演.桥梁建设,1995(4):11~15.
    [3]徐升桥,任为东,李艳明.丫髻沙大桥主桥设计眼J演.桥梁建设,2000(3):29~33.
    [4]彭卫.健跳大桥技术设计眼J演.桥梁建设,2000(3):34~37.
    [5]孙炳楠.浙江省淳安县南浦大桥整桥稳定试验与研究眼R演.浙江大学,2001.
    [6]广西省交通规划设计院.三岸邕江大桥设计眼Z演.1998.
    [7]范立础.桥梁抗震眼M演.上海:同济大学出版社,1997.
    [8]郑史雄,周述华,丁桂保.大跨度钢管混凝土拱桥的地震反应性能眼J演.西南交通大学学报,1999,34(3):320~324.
    [9]项海帆.大跨度斜拉桥的行波效应分析眼J演.同济大学学报,1983(2):1~9.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心