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Wind-induced vibration of a traffic-signal-support structure with cantilevered tapered circular mast arm

Citation

Zuo, D and Letchford, CW, Wind-induced vibration of a traffic-signal-support structure with cantilevered tapered circular mast arm , Engineering Structures: The Journal of Earthquake, Wind and Ocean Engineering, 32, (10) pp. 3171-3179. ISSN 0141-0296 (2010) [Refereed Article]

DOI: doi:10.1016/j.engstruct.2010.06.005

Abstract

Traffic-signal-support structures with cantilevered mast arms are known to exhibit large-amplitude vibrations under certain wind conditions. Previous investigations of the problematic vibrations have primarily focused on the aerodynamics of the signal heads of various configurations. Based on full-scale measurement of a traffic-signal-support structure, the role of the cantilevered mast arm in the aeroelastic vibrations is studied. Contrary to previous reports that the vibrations are due to galloping of the traffic signals, this study reveals that the aeroelastic interaction between the wind and the mast arm is critical in the excitation mechanism of the vibrations. Two types of excitation mechanisms, vortex-shedding at low wind speeds and buffeting at high wind speeds, were identified.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Interdisciplinary Engineering
Research Field:Turbulent Flows
Objective Division:Transport
Objective Group:Ground Transport
Objective Field:Road Infrastructure and Networks
Author:Letchford, CW (Professor Chris Letchford)
ID Code:70459
Year Published:2010
Web of Science® Times Cited:14
Deposited By:Engineering
Deposited On:2011-06-22
Last Modified:2012-08-30
Downloads:0

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