几何非线性对大跨拱桥地震反应影响分析

英文篇名：Analysis on Influence of Geometric Nonlinearity on Seismic Response of Long-span Arch Bridge
中文刊名：城市道桥与防洪
英文刊名：Urban Roads Bridges & Flood Control
作者：李攀
英文作者：Li Pan
中文关键词：拱桥 ; 几何非线性 ; 地震反应
英文关键词：arch bridge ; geometric nonlinearity ; seismic response
出版日期：2012-07-15
机构：上海市政工程设计研究总院(集团)有限公司;
年：2012
期：07
出版单位：城市道桥与防洪

摘要

该文以一座上承式钢桁拱桥为工程背景,用有限元软件MIDAS建立了全桥空间有限元模型。在分析了该桥自振特性的基础上,分别沿桥梁纵向、横向输入反应谱,分析了该桥的地震反应。以拱肋上弦的内力为研究对象,分析了恒载初始内力引起的几何非线性对该桥自振特性及地震反应的影响。研究结果表明恒载初内力引起的几何非线性不可忽略。
Taking a deck steel truss arch bridge as the engineering background, this paper sets up the three-dimensional finite element model of the whole bridge by using the finite element software MIDAS. Based on analysis of the natural vibration characteristics of the bridge, the response spectrum is inputted along the longitudinal and transverse directions respectively to analyze the seismic response of the bridge. As the study object of the internal force of upper chord of the arch rib, the paper analyzes the influence of geometric nonlinearity on the natural vibration characteristics and the seismic response of the bridge caused by the initial internal forces of dead load. The results show that the geometric nonlinearity caused by the initial internal forces of dead load can not be ignored.

引文

[1]JTG/T B02-01—2008,公路桥梁抗震设计细则[S].
    [2]刘星庚,伍小平.大跨度桥梁中的几何非线性问题[J].湖南工程学院学报.2003,13(4):64-67.
    [3]谢文.大跨度钢管混凝土拱桥非线性地震响应分析[D].长沙:长沙理工大学,2008.
    [4]邓暖.大跨度拱桥地震反应分析研究现状及进展[J].重庆科技学院学报.2006,8(1):66-69.
    [4]甘进.钢箱系杆拱桥动力特性及抗震性能分析[D].武汉:武汉理工大学,2007.
    [5]李鹏.大跨度系杆拱桥动力特性和抗震性能研究[D].南京:东南大学,2005.