Experimental Study of Across-Wind Aerodynamic Behavior of a Bridge Tower
Publication: Journal of Bridge Engineering
Volume 24, Issue 2
Abstract
This article presents an experimental investigation of a free-standing single-column bridge tower with chamfered square cross sections in smooth flow, with a particular focus on its aerodynamic characterization. First, a sectional model test with a scale ratio of 1:30 was conducted to determine the static force coefficients and across-wind aerodynamic damping features. In addition, a 1:80 scaled full aeroelastic model was employed to estimate its aeroelastic response characteristics. The experimental results reveal the occurrence of interactions between three-dimensional third-mode vortex-induced vibration (VIV) and first-mode galloping, which have rarely been reported in early documentation. However, the understanding in terms of the mechanism of such VIV–galloping interaction is still insufficient. Moreover, two types of aerodynamic stability countermeasures, namely, curved guide vanes and vertical fins, were proposed, and their effects on structural aerodynamic stability were examined. In general, it was found that the installation of curved guide vanes is more advantageous in terms of improving the aerodynamic stability of the structure.
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Acknowledgments
The work described in this article was fully supported by the National Natural Science Foundation of China (51778545) and Open Project of the State Key Laboratory of Disaster Reduction in Civil Engineering of China (Grant SLDRCE-MB-03).
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Published In
Journal of Bridge Engineering
Volume 24 • Issue 2 • February 2019
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jan 30, 2018
Accepted: Aug 8, 2018
Published online: Nov 29, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 29, 2019
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