斜拉桥拉索风-雨致振动(Ⅱ):参数研究  

Rain-Wind-Induced Vibration of Cables in Cable-Stayed Bridges(Ⅱ): Parameter Study

作　　者：李永乐[1] 向活跃[1] 殷殿国[1,2] 廖海黎[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]林同棪国际工程咨询(中国)有限公司,重庆401121

出　　处：《西南交通大学学报》2011年第5期713-718,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(50778155);教育部新世纪优秀人才支持计划资助项目(NCET-06-0802);四川省杰出青年学科带头人计划资助项目(2009-15-406);香港RGC重点项目(POLYU1-02)

摘　　要：为探讨斜拉桥拉索风-雨致振动的影响因素,基于修正驰振模型,利用空间模型测试的气动力系数,对斜拉桥拉索风-雨致振动的气动力参数、运动参数和结构参数进行了研究.气动力参数包括水路形状、风向角和索径等,运动参数有索的初始状态、水路运动等,结构参数为索的频率、阻尼和质量.研究表明,气动力参数和运动参数将影响拉索风-雨致振动的最大振幅响应,改变发生风-雨致振动的风速范围.In order to probe into factors influencing the wind-rain-induced vibration of cables in cable-stayed bridges,a systemic parametric investigation was carried out based on the modified galloping model and aerodynamic coefficients from spatial model tests.They are aerodynamic parameters,including rivulet shape,yaw angle,cable diameter and so on,motion parameters such as initial cable condition,rivulet motion and so on,and structural parameters,including the frequency,damping and mass of cable.The research results show that the aerodynamic parameters and the motion parameters will affect the maximum amplitude response of cable wind-rain-induced vibration and change the range of wind speed resulting in the rain-wind-induced vibration.

关 键 词：风-雨致振动 拉索 水路 气动力系数 参数研究 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]