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

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Title: Risk assessment model for wind-induced fatigue failure of cantilever traffic signal structures
Author: Cruzado, Hector J.
Abstract: The 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 .
URI: http : / /hdl .handle .net /2346 /9718
Date: 2007-08

Citation

Cruzado, Hector J. Risk assessment model for wind-induced fatigue failure of cantilever traffic signal structures. Doctoral dissertation, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /9718 .

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