大跨斜拉桥的侧向弯曲抖振及其控制

LATERAL BUFFETING OF LONG-SPAN CABLE-STAYED BRIDGES WITH ITS CONTROL

采用被动控制的传递函数算法，分析了被动调质阻尼器（ＴＭＤ）对长大跨径斜拉桥在悬臂施工和运营状态下的侧向弯曲抖振的控制效率；定义了有效控制域；给出了ＴＭＤ参数的计算公式。分析表明：被动ＴＭＤ对侧向弯曲抖振是一种有效的机械控制手段。

The controlling effectiveness of passive Tuned Mass Dampers (TMD)to the lateral buffeting of long-span cable-stayed bridges both during construction and operation is analyzed by using the transfer function algorithm for passive control. The effective control domain is definited. Furthermore, the formulas for optimum parameters of TMD are given. The analysis shows that using of passive TMDs is an effective mechanical means for suppressing the lateral buffeting of long-span cable-stayed bridges.