木拱廊桥在中国乃至世界桥梁史上是一种独有的创造，它有着独特的构造特点与结构受力性能。运用Sap2000分析软件，对享有世界第一跨度的浙江丽水九龙国家湿地九龙木拱廊桥进行精细建模，研究廊桥在不同荷载工况下的结构内力和挠度，并对分析结果进行对比。分析结果表明，“三节苗”与“五节苗”在2类工况下均能实现各杆轴力均匀变化，而弯矩、剪力相对较小，实现了拱结构受力机制。%Timber arch lounge bridge is a unique creation in the history of China and even the world, it has a unique structure characteristics and structural performance. By using the ifnite element analysis software Sap2000, a reifned modeling has been carried out, for Jiulong Wood Arch Lounge Bridge in Zhejiang Lishui Jiulong National Wetland, which enjoys a worldwide reputation as a ifrst long-span bridge. The structural internal force and deflection under different load conditions were measured and studied. The results show that“Three bar”and“ifve bar”under two kinds of working conditions can both realize the uniform axial force changes, while the bending moment, shear force were relatively small, thus realizing the mechanism of arch structure.
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