曲线斜拉桥抖振响应影响因素研究  

Factors influencing buffeting response of curved cable-stayed bridge

作　　者：聂子牛 陈得良[1] 周光伟[2] 钱长照[2] 陈昌萍[2] NIE Ziniu;CHEN Deliang;ZHOU Guangwei;QIAN Changzhao;CHEN Changping(School of Civil and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China;Fujian Provincial Key Laboratory of Wind Disaster and Wind Engineering,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]长沙理工大学土木与环境工程学院,湖南长沙410114 [2]厦门理工学院福建省风灾害与风工程重点实验室,福建厦门361024

出　　处：《交通科学与工程》2025年第2期97-104,共8页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(52178510)。

摘　　要：【目的目的】探讨曲线斜拉桥和直线桥在抖振特性及影响因素方面的差异。【方法方法】以厦门某景观曲线斜拉桥为研究对象,利用ANSYS软件建立该曲线斜拉桥的有限元模型并进行动力特性分析;采用谐波合成法模拟桥址处的脉动风场,利用风洞试验获得桥梁的气动三分力系数;基于桥梁的脉动风场计算该曲线斜拉桥所受的抖振力,进一步将该抖振力作用于有限元模型以分析考虑气动导纳和气动自激力时曲线斜拉桥的抖振位移响应。【结果结果】考虑气动导纳时,主梁各方向的位移均减小;在气动自激力作用下,主梁的竖向位移和扭转位移增加,而横向位移减小。【结论结论】研究结果对曲线斜拉桥的抖振响应计算具有一定的指导意义。[Purposes]The paper aims to investigate differences in the buffeting characteristics and their influencing factors of curved cable-stayed bridges and straight bridges.[Methods]Taking a scenic curved cable-stayed bridge in Xiamen as the research object,this paper built its finite element model with ANSYS and analyzed its dynamic characteristics.The fluctuating wind field of the bridge was simulated with harmonic synthesis,and its aerodynamic three-component force coefficients were obtained by wind tunnel tests.Based on the fluctuating wind field of the bridge,the study calculated its buffeting force,which was then applied to the finite element model to analyze buffeting displacement under the influences of aerodynamic admittance and self-excited aerodynamic force.[Findings]The displacement of main girder in every direction decreases when aerodynamic admittance is considered.The vertical displacement and torsional displacement increase,while lateral displacement decreases when self-excited aerodynamic force is considered.[Conclusions]The results can provide theoretical reference for buffeting response calculation of curved cable-stayed bridges.

关 键 词：曲线桥 脉动风场 抖振 气动导纳 自激力 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]