Assistant Professor of Civil Engineering, University of Wyoming, Laramie, WY
Adjunct Professor, University of Texas at Austin, Austin, TX
Professor of Civil Engineering, University of Wyoming, Laramie, WY
Pages: 14 Published: Jan 1999
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.
acoustic emission, traffic signal poles, wind-induced vibrations, fatigue, welds
Paper ID: STP15780S