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本文以赣州市赣南大道新世纪大桥为研究背景,应用Midas/Civil有限元分析软件,对大跨度钢桁架系杆拱桥的施工全过程进行了模拟计算,分析了几个典型施工控制工况下结构构件位移、应力和支反力情况,对关键控制截面(拱顶、L/4、拱脚)上、下缘累计应力历程以及拱顶截面累计位移历程进行了分析,结果表明新世纪大桥所采用的施工方法安全可靠。计算理论数据可作为该桥施工监控工作的参考。
In this paper, Ganzhou Gannan Avenue New Century Bridge as a research background, the application of Midas / Civil finite element analysis software, the construction of long-span steel truss tied arch bridge simulation of the whole process, analysis of a few typical construction control conditions The displacement history of the structural members, the stress and the reaction force are analyzed. The cumulative stress history of the upper and lower edges of the key control section (vault, L / 4, arch foot) and the accumulated displacement history of the dome section are analyzed. The construction method used is safe and reliable. Calculation of theoretical data can be used as the bridge construction monitoring reference.