Fatigue risks in the connections of sign support structures.
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2013-05-01
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Abstract:This research effort develops a reliability-based approach for prescribing inspection intervals for mast-arm sign support
structures corresponding to user-specified levels of fatigue-induced fracture risk. The resulting level of risk for a
particular structure is dependent upon its geographical location, the type of connection it contains, the orientation of its
mast-arm relative to north and the number of years it has been in service. The results of this research effort indicate that
implementation of state-of-the-art reliability-based assessment procedures can contribute very valuable procedures for
assigning inspection protocols (i.e. inspection intervals) that are based upon probabilities of finding fatigue-induced
cracking in these structures. The engineering community can use the results of this research effort to design inspection
intervals based upon risk and thereby better align inspection needs with limited fiscal and human resources.
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