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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: | Fluid mechanics and thermal engineering |
| Research Field: | Turbulent flows |
| Objective Division: | Transport |
| Objective Group: | Ground transport |
| Objective Field: | Road infrastructure and networks |
| UTAS Author: | Letchford, CW (Professor Chris Letchford) |
| ID Code: | 70459 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 29 |
| Deposited By: | Engineering |
| Deposited On: | 2011-06-22 |
| Last Modified: | 2012-08-30 |
| Downloads: | 0 |
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