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为了深入研究混凝土桥面板架设时对钢桁梁悬索桥主梁受力的影响,以沪蓉西高速公路四渡河特大悬索桥为背景,应用有限元软件Midas建立了全桥有限元模型。探讨了桁式加劲梁混凝土桥面板的两种加载方式:“全连接、全铺板”工艺和“边连接、边铺板”工艺。运用倒拆分析方法,以成桥状态为初始状态,分别对“全连接、全铺板”和“边连接、边铺板”工艺进行对比分析计算,分析加劲梁的位移与应力变化规律,对比了两种加载方式的优劣性,确定合理的加劲梁加载方式。对桁式加劲梁桥面系施工具有一定的指导意义。
In order to deeply study the influence of concrete bridge deck on the main girder of steel truss girder suspension bridge, the full bridge finite element model was established by the finite element software Midas on the background of the Siduhe Suspension Bridge on Shanghai-Chengdu Expressway. Two kinds of loading methods of truss stiffening beam concrete bridge deck are discussed: “fully connected, fully plank ” process and “edge connection, side plank ” process. Using the method of overturning analysis, taking the bridge state as the initial state, the contrastive analysis of the “fully connected, fully plankled” and " , Compares the advantages and disadvantages of the two loading methods, to determine a reasonable way to load the stiffener beam. It is of guiding significance to the construction of truss girder bridge deck system.