Optimal Design of Damper with Stiffness for Damping of Stay Cable under Bridge Deck Motion

Abstract:

This paper studies cable-damper mitigation model due to indirect excitation caused by bridge deck vibration. In the new mitigation model, as a rule of thumb, we considered a parallel association of idealize damper with a spring to simulate the inherent stiffness of the damper. The result shows that the interaction between the stiffness of the viscous damper could deeply impact the damper effectiveness, and the external damping should be increased deeply to provide the same non-dimensional modal damping when the inclined angle of cable decreases. The optimum damping coefficient of the non-idealized damper decreases when the stiffness of the damper increases.

• Periodical: Applied Mechanics and Materials (Volumes 438-439)
• Pages: 769-774
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.438-439.769
• Online since: October 2013
• Authors: Shuai Luo, Quan Sheng Yan, Hong Jun Liu
• Keywords: Bridge Deck Motion, Damper Stiffness, Modal Damping, Stay Cable, Vibration Control

References

[1] B. M. Pacheeo, Y. Fujino, Keeping cables calm. Civil Engineering, 63 (1993) 56-58.

[2] I. Kovacs, Zur frage der seilschwingungen und der seildampfung, Die Bautechnik, 59 (1982) 325-332 (In German).

[3] B. Pacheco, Y. Fujino, A. Sulekh, Estimation curve for modal damping in stay cables with viscous damper. Journal of Structural Engineering, 119 (1993) 1961-(1979).

DOI: 10.1061/(asce)0733-9445(1993)119:6(1961)

[4] S. Krenk, Vibrations of a taut cable with an external damper, Journal of Applied Mechanics, 67 (2000) 772-776.

DOI: 10.1115/1.1322037

[5] Y. Fujino, N. Hoang, Design formulas for damping of a stay cable with a damper, Journal of Structural Engineering, 134 (2008) 269-278.

DOI: 10.1061/(asce)0733-9445(2008)134:2(269)