Dynamic load environment of bridge-mounted sign support structures : research implementation plan.
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2005-09-01
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Edition:Research implementation plan.
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Abstract:Welded aluminum highway sign support trusses must withstand in-service dynamic loads, which largely
constitute the fatigue environment. Sources of these dynamic loads include the natural wind and seismic
environment, the artificial wind environment created by passing vehicle-induced motions of the supporting
bridge. A bridge mounted sign support structure located in ODOT District 12, on the I-77/I-480
interchange just south of Cleveland, suffered a fatigue failure of an upper chord member adjacent to a
support tower.
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