摘要
广东佛山同济大桥主桥为主跨200 m的独塔双索面混合梁斜拉桥。考虑到佛山地域文化、旅游产业、景观等多种因素,索塔整体曲线采用曲率变化大的“佛手”造型,截面采用双“椭圆”形截面。该异形索塔造型新颖、截面构造及受力复杂,国内鲜有案例。首先介绍了该桥塔的设计关键技术,对索塔承载力进行了仿真分析,然后通过有限元分析及索塔自立状态气弹模型风洞试验,探明了索塔的静力及动力抗风性能。结果表明,横风作用下索塔不会发生大幅涡激共振和驰振,抖振幅值较小,具有良好的抗风性能,可为类似桥塔设计提供参考。
Guangdong Foshan Tongji Bridge is a single-tower double-cable-plane hybrid-beam cable-stayed bridge with a main span of 200 m.Considering the regional culture,tourism industry,and landscape of Foshan,the tower shape of this bridge is designed as a buddha’s-hand with large curvature change.The cross-section of the tower is a double-elliptical-section.This tower is a novel structure which is uncommon in previous designs,with complex cross-section and force distribution.In this study,the key technologies of the specially-shaped tower design is introduced.With the finite element analysis and the wind tunnel test of the tower’s self-supporting aeroelastic model,the static and dynamic wind resistance of the tower is studied.The results show that no vortex induced vibration and galloping occur under cross wind and the buffeting amplitude is relatively small.The design of the tower provides some valuable reference for similar bridges.
作者
刘新华
周勇
唐文峰
敬海泉
LIU Xinhua;ZHOU Yong;TANG Wenfeng;JING Haiquan(CCCC Second Highway Consultants Co.,Ltd.,Wuhan,Hubei 430056,China;Scool of Civil Engineering Guangdong Foshan Central South University,Changsha,Hunan 410075,China)
出处
《公路工程》
北大核心
2020年第6期155-160,共6页
Highway Engineering
基金
湖南省教育厅资助项目(18A202)。
关键词
斜拉桥
索塔
变截面
抗风性能
气弹模型风洞试验
cable-stayed bridge
tower
variable cross section
wind-resistance performance
wind tunnel test on aero-elastic model
