吴淞江工程（上海段）长虹路桥设计

Design of Changhong Road Bridge in Shanghai Section of Wusong River Project

摘要:

为满足交通功能，营造良好的城市景观效果，吴淞江工程（上海段）长虹路桥采用拱形桁架桥，跨径为121 m。主桁采用2片三角形桁，跨中桁高为6.5 m。上下弦杆采用闭口箱形截面，腹杆采用工字形截面。桥面系采用正交异性钢桥面板，板桁结合，共同受力。下部结构采用空心V形墩、钻孔灌注桩。计算分析表明：行人舒适度满足《德国人行桥设计指南》（EN03 2008）CL1等级；节点受力合理，应力符合《公路钢结构桥梁设计规范》（JTG D64－2015）要求；桥面板抗疲劳性能良好；整体稳定系数为8.14。桥梁通过拱形桁架-空心V墩塑造了轻盈流畅的城市景观，受力性能好，可为同类工程提供参考。

Abstract:

To meet the traffic demands and create a good urban landscape effect, Changhong Road Bridge in Shanghai Section of Wusong River Project is an arched truss bridge with a span of 121 m. The main truss is a two-triangular truss and the midspan truss is 6.5 m high. The upper and lower chords are in the closed box-shaped section and the web members are in I-shaped section. The orthotropic steel deck is adopted for the bridge deck system, and the deck is combined with the truss to carry loads together. The hollow V-shaped piers and cast-in-place piles are used for the substructure. The calculation and analysis show that the pedestrian comfort level meets the CL1 grade of the German Pedestrian Bridge Design Guideline (EN03 2008). The force on the joints is rational and the stress meets the requirements of Specifications for Design of Highway Steel Bridge (JTG D64—2015). The deck exhibits the good fatigue resistance. The overall stability factor is 8.14. The bridge shapes a light and smooth urban landscape through arched trusses and hollow V-piers, and the load-bearing performance is good, which can provide a reference for similar projects.