ABSTRACT
Orthotropic steel deck is made by welding together thin steel plates and have excellent workability. However, many fatigue damages have been reported due to local deformation caused by passing vehicles. To implement appropriate maintenance management against this fatigue damage, it is important to analyze the strain response near the welded parts in the orthotropic steel deck. In this study, field measurements were conducted on in-service orthotropic steel deck bridges using a load truck. Triaxial strain gauges were used to measure the strain response near the welded parts in the orthotropic steel deck. Based on the measurement data obtained while the load car was running, the strain response, the magnitude and direction of the principal strain at different fatigue crack-prone locations were compared and discussed.
