兴隆76路中承式异形钢管拱桥总体设计

Overall Design of Half-through Special-shaped Steel Pipe Arch Bridge in Xinglong 76 Road

摘要:

兴隆76路中承式异形钢管拱桥为成都市天府新区直管区川法生态科技园的一座标志性景观桥梁，跨径组成为32 m+96 m+32 m，主拱拱圈整体造型为人字形，截面形状呈蜜桃形，除了左右两拱圈交汇处采用变截面外，其余区段均为等截面，主梁为等高等宽连续钢箱梁，其桥面板采用正交异性板结构，吊杆上、下端均采用钢锚箱与主拱拱圈、主梁进行锚固。采用有限元软件对主桥进行整体静力及稳定性分析，结果表明：在施工阶段及运营阶段主拱和主梁的承载能力均满足设计规范要求，桥梁具有良好的静力性能。通过总结此类桥梁结构的设计形式及受力特点，可为后续其他类似桥梁的设计提供经验参考。

Abstract:

A half-through special-shaped steel pipe arch bridge in Xinglong 76 Road is a landmark landscape bridge in Chuanfa Ecological Science and Technology Park in Tianfu New District of Chengdu City. Its span is 32 m+96 m+32 m. The overall shape of the main arch ring is herringbone, and the cross section is shaped like a peach. Except the intersection of the left and right arch rings is the variable cross section, the other sections are of equal section. The main beam is a continuous steel box girder of equal height and width. The bridge deck is of orthotropic plate structure. The upper and lower ends of the suspender are anchored with the steel anchor box, main arch ring and main beam. The finite element software is used to analyze the overall static force and stability of the main bridge. The results show that the bearing capacities of the main arch and main beam in the construction stage and the operation stage meet the requirements of the design specifications, and the bridge has the good static performance. By summarizing the design form and stress characteristics of this kind of bridge structure, the experience and reference can be provided for the design of other similar bridges.