Wind tunnel studies of cantilever traffic signal structures

被引：0
|
作者：
Cruzado, Hector J. [1 ]
Letchford, Chris [2 ]
Kopp, Gregory A. [3 ]
机构：
[1] Polytech Univ Puerto Rico, Dept Civil & Environm Engn, San Juan, PR USA
[2] Rensselaer Polytech Inst, Dept Civil & Environm Engn, Troy, NY USA
[3] Univ Western Ontario, Fac Engn, Boundary Layer Wind Tunnel Lab, London, ON, Canada
来源：
WIND AND STRUCTURES | 2013年 / 16卷 / 03期
基金：
美国国家科学基金会;
关键词：
cantilevered traffic signal structures; fatigue; wind-induced vibrations; galloping; vortex shedding;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The wind-induced vibrations of the mast arm of cantilever traffic signal structures can lead to the fatigue failure of these structures. Wind tunnel tests were conducted on an aeroelastic model of this type of structure. Results of these experiments indicated that when the signals have backplates, vortex shedding causes large-amplitude vibrations that could lead to fatigue failure. Vibrations caused by galloping were only observed for one particular angle of attack with the signals having backplates. No evidence for galloping, previously thought to be the dominant cause of fatigue failures in these structures, was observed.
引用
收藏
页码：225 / 240
页数：16
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