大跨度中承式钢管混凝土拱桥荷载试验研究及其结构性能评价

Load Test Study and Structural Performance Evaluation of Long Span Half-through Concrete Filled Steel Tube Arch Bridge

大跨度中承式钢管混凝土拱桥具有轻质高强、跨越能力大、施工方便、造价低等优势,近年来作为拱式体系桥梁被广泛应用于公路和城市道路建设中,由于该类桥型的构造形式和受力特点较常规桥梁复杂,因此对其静力和动力特性进行了研究,采用Midas civil软件建立了桥梁有限元模型,结合静载试验和动载试验研究,并应用加载和工况优化原则,给出了大跨度中承式钢管混凝土拱桥的结构性能评价结果,为同类桥梁的结构性能研究提供了参考。

The long span half-through concrete filled steel tubular arch bridge has the advantages of light weight,high strength,large span capacity,convenient construction and economic cost.In recent years,it has been widely used in highway and urban highway construction as an arch system bridge.Because the structural form and mechanical characteristics of this type of bridge are more complex than those of conventional beam bridges,its static and dynamic characteristics are studied.The finite element model of the bridge is established by Midas civil software.By combination of the static load test and dynamic load test research,application of the principles of load loading and condition optimization,the structural performance evaluation results of long span half-through concrete filled steel tubular arch bridge are given,which provides a reference for the structural performance research of similar bridges.