被动TMD对大跨斜拉桥风致抖振的控制

PASSIVE CONTROL OF BUFFETING OF LONG CABLE-STAYED BRIDGES BY TUNED MASS DAMPER

本文根据调质阻尼器(TMD)的基本原理及R.H.Scanlan教授提出的大跨悬吊桥梁风致抖振的分析理论,导出了TMD用于控制桥梁弯扭抖振的理论公式,在此基础上,讨论了一些工程约束条件,给出了按照这一方法设计TMD的步骤。最后,以国内新建成的一座大跨斜拉桥为例,分析了TMD的参数对抖振控制效果的影响。

A formula for calculating wind-induced buffeting response comprised bending and torsional motion of a cable-stayed bridge with TMD(tuned mass damper) has been derived in this paper based on the basic principle of TMD and the method of buffeting response analysis proposed by prof. R. H. Scanlan. Some engineering constraint conditions and steps of TMD design are given, Finally, a newly completed cable-stayed bridge in China has been taken as an example for analyzing the effects of the TMD parameters on reduction of buffeting responses.