Publication: Publication Date: 1 March 2011Testing Method:
Forensic Investigation of Out-of-plane Vibrations in the Webs of Plate Girders
This investigation determined that the observed vibrations in a cantilevered steel-truss bridge in Cleveland, Ohio were due to the dynamic variation of the amplitude of the buckled shape of the web panels under the impact of traffic-induced live loads. It was also determined that stress caused by the vibrations was below the threshold of expected fatigue damage and that no corrective measures were required.
References
AASHTO, AASHTO LRFD Bridge Design Specifications,
American Association of State Highway and Transportation
Officials, Washington, DC, 2004.
AISC, Steel Construction Manual (13th ed.), American Institute
of Steel Construction, Chicago, Illinois, 2005.
Salmon, C. G. and J. E. Johnson, Steel Structures: Design
and Behavior, Emphasizing Load and Resistance Factor
Design, (3rd Ed.), New York, New York, Harper Collins,
1990.
Sivakumar, B., F. Moses, G. Fu, and M. Ghosn, NCHRP
Report 575: Legal Truck Loads and AASHTO Legal Loads for
Posting, Washington, D.C., 2007.
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