温州市七都大桥北汊桥主桥斜拉索振动控制技术  

Vibration Control Technology of Stay Cables of Main Bridge of North Branch of Qidu Bridge in Wenzhou City

作　　者：董桦桦 赵海威 杨林 DONG Hua-hua;ZHAO Hai-wei;YANG Lin(Wenzhou Urban Infrastructure Construction Investment Co.,Ltd.,Wenzhou,Zhejiang 325000,China;State Key Laboratory for Health and Safety of Bridge Structures,Wuhan,Hubei 430034,China;China Railway Bridge Scientific Research Institute Co.,Ltd.,Wuhan,Hubei 430034,China)

机构地区：[1]温州市城市基础设施建设投资有限公司,浙江温州325000 [2]桥梁结构健康与安全国家重点实验室,湖北武汉430034 [3]中铁大桥科学研究院有限公司,湖北武汉430034

出　　处：《黑龙江交通科技》2022年第1期83-85,共3页Communications Science and Technology Heilongjiang

摘　　要：近年来,随着斜拉桥的数量增多,斜拉索风致振动问题也日益突出,为了有效控制斜拉索风致振动,以温州市七都大桥北汊桥主桥为主跨360 m的双塔中央索面叠合梁斜拉桥为研究背景,针对该桥斜拉索的振动特性,其中,最长斜拉索长193.8 m,最大索重16.6 t,采用粘性剪切型阻尼器(VSD)抑制斜拉索的振动,并对阻尼器参数进行优化设计。理论分析及实桥测试结果表明:安装阻尼器后,斜拉索对数衰减率在3%以上,满足斜拉索减振需求。The main bridge of the north branch of Wenzhou Qidu Bridge is a cable-stayed bridge with a double-tower central cable plane superimposed beam with a main span of 360 m.The longest stayed cable is 193.8 m and the maximum cable weight is 16.6 t.The Viscous Shear Damper(VSD)is used to suppress the vibration of the stayed cable.According to the vibration characteristics of the stayed cable of the bridge,the damper parameters are optimized by design.Theoretical analysis and actual bridge test results show that after the dampers are installed,the logarithmic attenuation rate of the stay cable is above 3%,which meets the requirements of stay cable vibration reduction.

关 键 词：斜拉桥 斜拉索 振动抑制 粘性剪切阻尼器 剪切面积 

分 类 号：U442[建筑科学—桥梁与隧道工程]