[CS8-15] Development of HTS-SQUID inspection system for orthotropic steel decks of expressway bridges
Keywords:SQUID, non-destructive evaluation, Eddy current testing, orthotropic steel deck, fatigue crack
In this study, We have developed a HTS-SQUID eddy current testing (ECT) system for detection of a fatigue crack in a steel deck plate. A field test using the SQUID ECT system was performed on an expressway bridge having an orthotropic steel deck structure. Although a signal corresponding to existence of a fatigue crack was not detected due to a low occurrence rate of fatigue crack, we could demonstrate a stable and long-time operation in an urban area during the daytime and acquisition of correct data corresponding to some structural features of the expressway bridge.
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