Wind-Tunnel Experiments on Vortex-Induced Vibration of Rough Bridge Cables
Publication: Journal of Bridge Engineering
Volume 22, Issue 10
Abstract
Surface roughness, ice accretion, and atmospheric turbulence are important issues because they can considerably alter the aerodynamic characteristics of bridge cables. The present study describes wind-tunnel experiments on vortex-induced vibrations of rough bridge cables characterized with various surface roughness and performed at various levels of atmospheric turbulence. Three different cable models were used: a smooth cylinder to represent dry cables, a helical strand cable, and a cable with modeled ice accretion. The studied parameters include the critical velocity and amplitude of vortex-induced vibration and parameter sensitivity to changes in flow turbulence and cable surface roughness. The results obtained indicate that cable roughness and turbulence of the flow have significant influences on the dynamic response of bridge cables. The experimental results indicate that the vortex-induced vibration was largest for the ice-accreted bridge cable.
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Acknowledgments
This work was supported by Project No. 17-26353J from the Czech Science Foundation and by the CET sustainability project LO1219 (SaDeCET) of the Ministry of Education, Youth and Sport of the Czech Republic. Professor Rüdiger Höffer of the Ruhr-University Bochum, Germany, is acknowledged for support with respect to the experimental work.
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 10 • October 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Sep 30, 2016
Accepted: Apr 24, 2017
Published online: Jul 26, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 26, 2017
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