Risk assessment model for wind-induced fatigue failure of cantilever traffic signal structures

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dc.contributor.committeeChairLetchford, Christopher W.
dc.contributor.committeeMemberEwing, Bradley T.
dc.contributor.committeeMemberMehta, Kishor C.
dc.contributor.committeeMemberPeterson, Richard E.
dc.creatorCruzado, Hector J.
dc.date.accessioned2016-11-14T23:12:14Z
dc.date.available2011-02-18T19:10:31Z
dc.date.available2016-11-14T23:12:14Z
dc.date.issued2007-08
dc.degree.departmentCivil Engineeringen_US
dc.description.abstractThe wind-induced vibrations of the mast arm of cantilever traffic signal structures can lead to the fatigue failure of these structures. Both full-scale and wind tunnel tests were conducted to study the behavior of the structures. Results of these experiments indicated that when the signals have backplates, vortex shedding can cause large-amplitude vibrations that may lead to fatigue failure. These results contradict what has been generally accepted by other researchers: that galloping is the main cause for the fatigue inducing vibrations and that vortex shedding is of no relevance in this type of structure. A methodology to estimate the fatigue life of these structures was developed. Using the climatology of the region, the methodology was applied as a risk assessment model to traffic signal structures of the city of Lubbock. Guidance is given on how life-cycle cost analysis can be applied to the structures.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2346/9718en_US
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.rights.availabilityUnrestricted.
dc.subjectWind-induced fatigueen_US
dc.subjectCantilever trafficen_US
dc.subjectRisk assessmenten_US
dc.titleRisk assessment model for wind-induced fatigue failure of cantilever traffic signal structures
dc.typeDissertation

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