异形人行景观斜拉桥全桥气弹模型风洞试验研究  

Aero-elastic Model Testing of the Full Special-shaped Landscape Cable-Stayed Pedestrian Bridge

作　　者：李航 欧阳璐 范周健 刘启明 王海 孙秀贵 Li Hang;Ouyang Lu;Fan Zhoujian;Liu Qiming;Wang Hai;Sun Xiugui(Changsha Public Engineering Construction Center,Changsha 410013,China;Key Laboratory for Wind and Bridge Engineering of Hunan Province,College of Civil Engineering,Hunan University,Changsha 410082,China;Changsha Housing&Urban Rural Development Bureau,Changsha 410075,China;Hunan Provincial Communications Planning,Survey and Design Institute,Changsha 410008,China)

机构地区：[1]长沙市公共工程建设中心,湖南长沙410013 [2]湖南大学土木工程学院风工程与桥梁工程湖南省重点实验室,湖南长沙410082 [3]长沙市住房和城乡建设局,湖南长沙410075 [4]湖南省交通规划勘察设计院有限公司,湖南长沙410008

出　　处：《市政技术》2023年第9期185-191,共7页Journal of Municipal Technology

基　　金：长沙市政府采购研究项目(CSCG-202107060066)。

摘　　要：异形独塔曲线斜拉桥是一种新颖而美观的桥梁结构,特别适合于人行景观桥。以一座主跨152 m的异形人行景观斜拉桥为研究对象,探究该桥的抗风性能。通过有限元建模和结构动力特性分析,设计制作了该桥的全桥气弹模型,并开展了风洞试验,获得了该桥在不同风速、风偏角和风攻角下的响应规律。试验结果表明,通过附加阻尼装置等机械措施,增加了桥梁结构阻尼,能够使桥梁的涡振性能和颤振稳定性满足规范要求。该研究结果对于进一步优化异形独塔曲线斜拉桥的设计和加强其抗风性能具有指导意义,为类似结构的桥梁提供了有益的经验和参考,有助于提高桥梁的安全性和可靠性。The special-shaped single-tower curved cable-stayed bridge is a novel and beautiful bridge structure,particularly suitable for pedestrian landscape bridges.This study focuses on a special-shaped landscape cable-stayed pedestrian bridge with main span of 152-meter to investigate its wind resistance performance.By finite element modeling and analysis of structural dynamic characteristics,a full bridge aero-elastic model was designed and made for wind tunnel test to obtain the response law of the bridge under different wind speeds,wind yaw angles and wind attack angles.The experimental results show that the structural damping of the bridge is increased by incorporating additional damping measures,such as tuned mass dampers(TMDs),which satisfied the requirements of vortex-induced vibrations and flutter stability in the specifications.The research provide valuable insights and references for the design and enhancement of wind resistance performance in similar structures,contributing to the improvement of bridge safety and reliability.

关 键 词：异形人行景观斜拉桥 全桥气弹模型 风洞试验 涡激共振 颤振稳定性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]