跨南水北调总干渠桁架式系杆拱桥荷载试验分析

以南水北调总干渠上85m跨径的某钢管混凝土系杆拱桥为例,采用有限元软件Midas Civil建立该桥的空间有限元模型,根据移动荷载分析及动力特性计算结果,制定桥梁的荷载试验方案。通过全桥荷载试验与理论分析,对比检验了桥梁结构的设计与施工质量,评估了桥梁结构的承载能力,文中的荷载试验方法可为跨南水北调总干渠同类型桥梁评定提供借鉴参考。

Load Test Analysis of Tied Truss Arch Bridge over Main Canal of South-to-North Water Diversion Project

The finite element software Midas Civil was used to develop a three-dimensional model of a practical CFST tied arch bridge with a main span of 85 m over the main canal of the South-to-North Water Diversion Project. Based on the results of moving load analysis and dynamic characteristic property calculation, the load test plan of the bridge was proposed. According to the load test and theoretic analysis of the whole bridge, the design and construction quality of the bridge were tested, and the load bearing capacity of the bridge structure was evaluated. The load test method presented in this paper can provide the basis for the evaluation of the same type of bridges over the main canal of the South-to-North Water Diversion Project.