Research on The Influence of The Aerodynamic Measure on The Flutter Derivative of The Steel Truss Suspension Bridge
Flutter derivative is a significant index of the structure flutter stability.Identifying flutter derivative precisely contributes to the bridge flutter stability analyzing.In this paper,we take a research on the Liujiaxia Bridge in Gansu Province,China.Different flutter derivatives,which were got via segment model vibration tests with different aerodynamic measures,were classified,and made comparison in order to get the law of how different aerodynamic measures effect on the flutter derivative.The results show that,setting central stabilized plate,Build-in deflector,flange plate all affect flutter derivative significantly,which leads to changes in the flutter critical wind velocity of the structure.Setting central stabilized plate above the deck contributes to identify the flutter derivative of the 0° and positive attack angle,while setting central stabilized plate will contribute to flutter derivative identification at negative angles.It will make it difficult to identify the flutter derivative at 0° and-3° if the built-in deflector was set.Wind plate contributes to the identification of the flutter derivative at +3°,however,it will make it harder to identify the flutter derivative at 0°and-3°.
Bridge Engineering Steel Fruss Suspension Bridge Flutter Derivative Aerodynamic Measure Wind Tunnel Trial
Bai Hua Guo Wei Li Wei Li Yu
Key Laboratory of Ministry of Communications for Bridge Detection & Reinforcement Technology,Changan University, Xian 710064, Xian, China
国际会议
西安
英文
252-256
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）