STP1353

    AE Evaluation of Fatigue Damage in Traffic Signal Poles

    Published: Jan 1999


      Format Pages Price  
    PDF (244K) 14 $25   ADD TO CART
    Complete Source PDF (5.6M) 14 $55   ADD TO CART


    Abstract

    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.

    Keywords:

    acoustic emission, traffic signal poles, wind-induced vibrations, fatigue, welds


    Author Information:

    Hamilton, HR
    Assistant Professor of Civil Engineering, University of Wyoming, Laramie, WY

    Fowler, TJ
    Adjunct Professor, University of Texas at Austin, Austin, TX

    Puckett, JA
    Professor of Civil Engineering, University of Wyoming, Laramie, WY


    Paper ID: STP15780S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP15780S


    CrossRef ASTM International is a member of CrossRef.