自锚式钢箱梁悬索桥静力稳定性分析

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英文篇名：Analysis on Static Stability of Self-Anchored Suspension Bridge with Steel Box Girder 作者：王春江 ; 戴建国 ; 臧瑜 ; 肖华裕 英文作者：WANG Chun-jiang;DAI Jian-guo;ZANG Yu;XIAO Hua-yu;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.;Ningbo Urban Infrastructure Construction and Development Company; 关键词：自锚式悬索桥 ; 钢箱梁 ; 稳定性 ; 整体稳定 ; 局部稳定 ; 多尺度模型 ; 有限元法 英文关键词：self-anchored suspension bridge;;steel box girder;;stability;;integral stability;;local stability;;multi-scale model;;finite element method 中文刊名：QLJS 英文刊名：Bridge Construction 机构：上海交通大学船舶海洋与建筑工程学院;上海市政工程设计研究总院(集团)有限公司;宁波市城市基础设施建设开发公司; 出版日期：2019-04-28 出版单位：桥梁建设 年：2019 期：v.49;No.255 语种：中文; 页：QLJS201902009 页数：5 CN：02 ISSN：42-1191/U 分类号：50-54

摘要

为了解自锚式钢箱梁悬索桥的整体失稳模态和钢箱加劲梁的局部稳定性,以重庆鹅公岩轨道专用桥(主跨600m自锚式钢箱梁悬索桥)为背景,采用Abaqus软件建立全桥多尺度有限元模型(跨中段钢箱梁建立局部精细模型),采用弧长法进行非线性静力稳定承载力分析,研究该桥的整体稳定和局部稳定问题及其相互影响规律。结果表明:达到整体稳定极限荷载时,该桥跨中段钢箱梁发生明显的竖向和横向变形,全桥静力稳定极限状态由钢箱梁的整体稳定控制;整体稳定极限状态下,跨中段钢箱梁主要板件不会发生局部屈曲,中腹板局部发生屈服,其余板件仍处在弹性阶段,中腹板是钢箱梁局部稳定的控制部件。
        In order to investigate the integral instability mode of the self-anchored suspension bridge with steel box girder and the local stability of the steel box stiffening girder,Chongqing Egongyan Rail Transit Special Use Bridge(a self-anchored suspension bridge with steel box girder and main span of 600 m)was taken as a research background.Moreover,a multi-scale finite element model was established by the Abaqus software,in which the steel box girder in a mid-span position was modeled in refined elements locally.Thereby,the nonlinear static stability analysis for the bridge was analyzed by using the arc-length method,and the integral stability,local stability and the interaction between these two stability phenomena of the bridge were investigated.Conclusions can be drawn as follows:when the ultimate load for integral stability is loaded,the vertical and transverse deformations in mid-pan position of the bridge occur obviously,and the ultimate state of static stability for the bridge can be controlled by the integral stability of the steel box girders;in a state of the ultimate stability,local buckling phenomena of the main panels in steel box girders of mid-span will not occur,and the middle web will be in a yield state but the other panels will be still in an elastic state,thus the middle web is the controlling part for the static local stability of steel box girders.

引文

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