斜拉桥索的风振现象及天津慈海斜拉桥的抑振措施  

WIND-INDUCED VIBRATION FOR STAY CABLES OF CABLE-STAYED BRIDGES AND VIBRATION-CONTROL METHOD FOR CIHAI BRIDGE OF TIANJIN

作　　者：陈志华[1] 李毅佳[2] 王小盾[3] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津理工大学经济与管理学院,天津300191 [3]清华大学土木工程系,北京100084

出　　处：《钢结构》2007年第1期65-69,共5页Steel Construction

摘　　要：斜拉桥的斜拉索对风荷载作用十分敏感,在风单独作用和风、雨共同作用下会发生振动。通过介绍世界几座著名桥梁斜拉索的风振实例及其抑振措施,对斜拉索的几种风致振动进行分析和总结。对斜拉桥拉索最可能发生的尾流驰振和风雨振的产生条件、振动特性、发生机理及抑振措施进行分析,最后对天津慈海桥进行分析,并论述慈海桥可能发生的三种风致振动现象,提出了三种抑振方法。Stay cable is very sensitive to wind load. It would vibrate under not only the sole wind load but also the wind and rain loads. It is discussed that several famous examples about wind-induced vibrations of stay cable. Through analyzing and summarying various wind induced vibrations, it is concluded that the wind-induced vibrations mainly include Karman vortex induced oscillation, parametric vibration, buffeting vibration, wake galloping and wind and rain vibrations. The conditions,characteristics,mechanism and control methods of the last two vibrations, which would happen easily, are analyzed deeply. Finally the general conditions of Cihai Bridge in Tianjin are analyzed and three types of possible vibrations are described and then three vibration-control methods are presented.

关 键 词：桥梁工程 斜拉桥索 尾流驰振 风雨振 慈海桥 抑振措施 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]