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为研究大跨径双工字钢组合梁斜拉桥的适用跨径范围,通过对主塔主梁各尺寸参数的设计,进行大跨径双工字钢组合梁斜拉桥的试设计分析,结合采用Midas/Civil软件建立有限元模型,对单一荷载作用下以及组合荷载作用下的主梁的应力状态和抗风性能进行了计算验证;对主跨跨径600m、700m、800m的混凝土板和钢梁部分受力进行了分析。分析结果表明,大跨径双工字钢斜拉桥满足设计要求,且具有较大的竖向刚度和风致颤振稳定性能,为以后的大跨径斜拉桥设计提供参考。
In order to study the suitable span of cable-stayed bridge with large-span double-beam composite beam, the trial design and analysis of large-span double-glazed composite beam cable-stayed bridge with main beam through the design of each dimension of the main beam, The finite element model was established by using Midas / Civil software to calculate and verify the stress state and wind resistance performance of main girder under single load and combined load. For the concrete slabs of 600m, 700m and 800m span of main span and Beam part of the force were analyzed. The analysis results show that the long-span double-girder cable-stayed bridge meets the design requirements and has large vertical stiffness and wind-induced flutter stability, which can provide references for the design of long-span cable-stayed bridges in the future.