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[I-58] Study for Practical Use of Semi-Automatic Phased Array Ultrasonic Testing for Orthotropic Steel Deck Plates

〇Go Saitoh¹ (1.Highway Technology Research Center)

Keywords:steel highway bridge, orthotropic steel deck, fatigue cracks, nondestructive inspection, Ultrasonic Phased Array, Full Matrix Capture and Total Focusing Method

This study was improvement examination of the inspection of cracks of orthotropic steel deck plates.The purpose of this study was examined to improve SAUT for OSD of the current model to Sectorscan and FMC/TFM type. As a result of examination, the inspection efficiency doesn’t have a difference, and It proved that the detection of the crack that had lower height was possible. But setting a cut-off level 6mm, it is excessive performance. In one, there is a problem, that the impossible range for inspection by the member of intersection becomes long. This paper presents the results of effective method, that is to carry out screening by a current model, and the detailed inspection and followup by PSAUT for OSD.