Tuned Mass Dampers for Dual-Mode Buffeting Control of Bridges
Publication: Journal of Bridge Engineering
Volume 8, Issue 4
Abstract
The objective of this paper is to present the idea of control of the dual-mode buffeting response in suspension bridges under service conditions using two tuned mass dampers (TMDs). The bridge is assumed to vibrate in two vertical modes, which are to be controlled using two TMDs. The TMDs’ properties are determined by minimizing the maximum buffeting response of the bridge. By neglecting modal coupling terms, some approximate formulas are derived. A numerical example is used to understand the requirements for the TMDs. The results show that, as compared to using only one TMD, the dual TMDs offer a more pronounced response reduction. The results also reveal some disadvantages of using the TMD system for buffeting vibration control. The major one is that the efficiency of the TMD system declines and the strokes increase significantly as the wind speed increases.
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References
Gu, M., Xiang, H. F., and Chen, A. R.(1994). “A practical method of passive TMD for suppressing wind-induced vertical buffeting of long-span cable-stayed bridges and its application.” J. Wind. Eng. Ind. Aerodyn., 51, 203–213.
Scanlan, R. H.(1978). “The action of flexible bridges under wind. II: Buffeting theory.” J. Sound Vib., 60(2), 201–211.
Scanlan, R. H., and Gade, R. H.(1977). “Motion of suspended bridge spans under gusty wind.” J. Struct. Div. ASCE, 103(9), 1867–1883.
Tang, K. H. (1997). “Tuned mass dampers for flutter and buffeting control of long-span suspension bridges.” MS thesis, Dept. of Mechanical Engineering, Hong Kong University of Science and Technology, Hong Kong.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 8 • Issue 4 • July 2003
Pages: 237 - 240
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Dec 30, 1999
Accepted: Jul 31, 2002
Published online: Jun 13, 2003
Published in print: Jul 2003
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