大跨度空间斜对称纽带拱桥设计与分析
Design and Analysis of Large-span Spatial Oblique Symmetrical Link Arch Bridge
滕小竹1
作者信息
- 1. 同济大学建筑设计研究院(集团)有限公司,上海市 200092
- 折叠
摘要
大运路潇河大桥为世界首座大跨度空间斜对称纽带拱桥,桥梁跨径布置为65 m+110m+110m+65 m=350 m.大桥通过横梁连接主、副拱与主梁形成拱梁固结,将空间斜对称纽带拱桥力学特性转化为拱梁组合体系,结构自平衡,无水平推力;桥梁拱肋采用抛物线拱轴线、箱形断面,斜跨主拱跨径国内最大为229 m;主梁采用半封闭双边钢箱梁;对桥梁进行了空间静力、疲劳、稳定、抗震性能整体分析及拱脚局部分析,结果满足规范要求.
Abstract
The Xiaohe River Bridge on Dayun Road is the first large-span spatial oblique symmetrical link arch bridge in the world.Its layout of bridge span is(65+110+110+65)m=350 m.Its main arch and secondary arch are connected through the cross beam,and are formed the arch-beam consolidation with the main girder.The mechanical characteristics of the spatial oblique symmetrical link arch bridge are translated into an arch beam composite system with the self-balancing structure and without the horizontal thrust.The parabolic arch axis and box section are adopted for the arch ribs of the bridge.The inclined-span main arch span of 229 m is the largest span in China.The main girder is the semi-closed double-side steel box girder.The overall analysis of spatial static force,fatigue,stability and seismic performance of the bridge is conducted,as well as a local analysis of the arch foot.The results all meet the specification requirements.
关键词
拱桥/斜对称纽带拱/斜跨主拱/外倾副拱/拱梁组合/桥梁设计Key words
arch bridge/oblique symmetrical link arch/inclined-span main arch/camber secondary arch/arch beam composition/bridge design引用本文复制引用
出版年
2024
NETL
NSTL
万方数据