Combined Damping Effect of Two Dampers on a Stay Cable
Publication: Journal of Bridge Engineering
Volume 13, Issue 3
Abstract
The combined effect of two dampers, either on the same end or opposite ends of a stay cable, is analytically studied in this paper. By considering small distances of the dampers from the anchorages, an asymptotic formula for the modal damping ratio of the cable is derived from which the total damping effect is presented in an explicit form. It is shown that when two dampers are installed at opposite ends of the cable, the total damping effect is asymptotically the sum of the contributions from single dampers. On the contrast, if two dampers are at the same end, there is no advantage of increasing the maximum modal damping in the cable over the use of a single damper.
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References
Caracoglia, L., and Jones, N. P. (2007). “Damping of taut-cable systems: Two dampers on a single stay.” J. Eng. Mech., 133(10), 1050–1060.
Fujino, Y., and Hoang, N. (2007). “Design formulas for damping of a stay cable with a damper.” J. Struct. Eng., 134(2).
Hoang, N., and Fujino, Y. (2007). “Analytical study on bending effects in a stay cable with a damper.” J. Eng. Mech., 133(11), 1241–1246.
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Pacheco, B. M., Fujino, Y., and Sulekh, A. (1993). “Estimation curve for modal damping in stay cables with viscous damper.” J. Struct. Eng., 119(6), 1961–1979.
Xu, Y. L., and Yu, Z. (1998). “Mitigation of three-dimensional vibration of inclined sag cable using discrete oil dampers. II: Application.” J. Sound Vib., 214, 675–693.
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Information
Published In
Journal of Bridge Engineering
Volume 13 • Issue 3 • May 2008
Pages: 299 - 303
Copyright
© 2008 ASCE.
History
Received: Apr 20, 2007
Accepted: Jul 26, 2007
Published online: May 1, 2008
Published in print: May 2008
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