SYMPOSIA PAPER Published: 01 January 1999

AE Evaluation of Fatigue Damage in Traffic Signal Poles


Two traffic signal structures recently collapsed in Wyoming. The collapse was a result of brittle fracture of the connection between the cantilever signal light support arm (mast arm) and the vertical pole (post) caused by wind-induced, largeamplitude vibrations of the mast arm. This paper presents the problem, the proposed test program, the results of initial development tests, and the effort to develop a viable AE testing technique along with evaluation criteria that can be used to screen in-service traffic signal poles.

Author Information

Hamilton, HR
University of Wyoming, Laramie, WY
Fowler, TJ
University of Texas at Austin, Austin, TX
Puckett, JA
University of Wyoming, Laramie, WY
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Developed by Committee: E07
Pages: 50–63
DOI: 10.1520/STP15780S
ISBN-EB: 978-0-8031-5402-5
ISBN-13: 978-0-8031-2498-1