大跨桥梁风致振动的半主动控制

A New Semi-Active Control Method of Wind Induced Vibration of Long-Span Bridges

根据桥梁风振效应 ,初步建立了大跨桥梁风振控制的安全性目标和使用性目标。并针对大跨桥梁风致振动的特点 ,考虑桥梁风振的参数不确定性 ,提出了桥梁风振半主动控制的概念 ,设计了一种新型的可调频率的半主动调质阻尼器 ,建立了相应的分析方法。以国内一座悬索桥为例 ,分析了半主动调质阻尼器对其风致振动的控制。结果表明 。

Safety and serviceability are in this paper preliminarily established for controlling wind induced vibration of long span bridges. Then the concept of semi active control of the wind induced vibration of long span bridges is put forward considering the characteristics of the wind induced vibration of such bridges. A new semi active tuned mass damper device with adjustable frequency and the corresponding control strategy are proposed. A case example of a suspension bridge in China indicates that the present semi active control method is much more effective than the passive control method for suppressing wind induced vibraton of long span bridges.