摘要
上海长江大桥轨道交通与道路交通处于同一桥面,且公路车道明显多于轨道交通,因此如何确定大桥合理的竖向刚度设计值是桥梁建设中的关键技术之一。以列车过桥走行性为控制因素,首先采用传统方法将活载产生的桥梁挠曲线静态线形作为轨道车辆行走时的不平顺的激励,初步确定满足列车走行性时的桥梁设计的竖向刚度最小限值,然后采用道路车辆、轨道列车与桥梁共同耦合振动的分析方法进行车桥动力响应计算,分析2种方法计算结构的差别,并对前述大桥刚度最小限值进行修正,最后提出上海长江大桥主桥容许的竖向刚度最小设计限值。
The highway lanes and light rail lines of Shanghai Changjiang River Bridge are arranged on the same deck and the highway lanes are obviously more than the light rail lines. Hence, the way of how to rationally determine the vertical stiffness design value becomes one of the key techniques for construction of the Bridge. In this paper, the ability of the train riding through the Bridge is used as the control factor. Firstly, by using the conventional method, the static deformation curves of the bridge deflection caused by the live load are regarded as the unevenness excitation at the time the train rides through and the minimum vertical stiffness limit value for the bridge design that can satisfy the rideability of the train is preliminarily determined. Secondly, the dynamic responses of the vehicles （train） and the bridge are calculated by using the analysis methods of the coupling vibration among the highway vehicles, light rail train and the bridge, the calculation differences of the two kinds of the methods are analyzed, the minimum vertical stiffness limit value as mentioned is modified and finally, the minimum design value of the vertical stiffness of the Bridge is given.
出处
《世界桥梁》
北大核心
2009年第A01期82-86,共5页
World Bridges
基金
上海市优秀学科带头人计划支持(07XD14204)
关键词
上海长江大桥
容许刚度
梁端折角
走行性
车桥耦合振动
随机车流
Shanghai Changjiang River Bridge
stiffness limit
rotation angle at girder end
rideability
vehicle and bridge coupling vibration
random vehicle flow
