独塔无背索曲线钢管梁斜拉桥设计与分析

Design & Analysis of Curved Steel Tube Girder Cable-Stayed Bridge with Single Tower &Non-Backstays

城市人行桥与公路、铁路桥梁相比更加重视景观效果,造型新颖的人行桥在方案比选中往往更具竞争力。南京幸福河人行桥设计采用独塔无背索曲线钢管梁斜拉桥新颖桥型,主梁采用大直径圆钢管,并与桥台固结形成整体式桥台,梁端及塔底的钢-混结合段采用PBL剪力键,并设计拉索张拉的装置及施工方法。采用MIDAS CIVIL软件建立全桥有限元模型并进行静动力分析。结果表明,桥梁结构设计合理,验算结果满足规范要求。

Compared with highway & railway bridges, urban pedestrian bridges pay more attention to the landscape effect, and the pedestrian bridges with novel shapes are often more competitive than the selected ones. The Xingfu River Pedestrian Bridge in Nanjing is designed as a new type of cable-stayed bridge with curved steel tube girder without back cables. The main beam is made of large diameter round steel tubes, which are consolidated with the abutment to form an integral abutment. The steel-concrete composite section at the beam end & tower bottom uses PBL shear keys, and the cable tensioning device & construction method are designed. MIDAS CIVIL software is used to establish the finite element model of the whole bridge and conduct static & dynamic analysis. The results show that the bridge structure design is reasonable and the checking results meet the requirements of the specification.