佛山市某大跨径铝合金人行天桥桁梁结构分析

铝合金作为一种优质的新型桥梁结构材料，具有轻质高强、易养护、低碳环保、施工便捷、景观性强等特点。近年来，铝合金结构在城市人行天桥中已被较多应用，但少有大跨径铝合金人行天桥应用实例。以佛山市禅城区佛山大道（澜石路口）人行天桥为例，详细介绍大跨径铝合金人行天桥上部结构设计。通过MIDAS及3D3S有限元模型，对大跨径铝合金人行天桥上部结构进行选型分析，可为大跨径铝合金人行天桥上部结构设计提供参考。

Analysis on Truss Beam Structure of a Long-span Aluminium-alloy Footbridge

As a high-class new bridge structural material, the aluminium alloy has the characteristics of light and high strength, each maintenance, low-carbon environmental protection, convenient and fast construction and high landscape performance. In recent years, the aluminium alloy structure has been more applied in the urban footbridges. But there is rare application case of long-span aluminium alloy footbridge. Taking Foshan Avenue Footbridge (intersection of Lanshi Road) in Chancheng District of Foshan as an example, the superstructure design of the long-span aluminium alloy footbridge is introduced in detail. The superstructure of the long-span aluminium alloy footbridge is selected and analyzed through MIDAS and 3D3S finite element models, which can be referred for the superstructure design of the long-span aluminium alloy footbridge.