In this study, the effectiveness of ICR treatment on fatigue cracks in sole plate welding was evaluated. Fatigue tests were carried out on plate girder specimens with welding sole plates. For all specimens, fatigue cracks initiate from the weld root and propagate through the weld bead. The 11 mm long crack that appeared on the bead surface has almost been arrested by ICR treatment. For the 37 mm long crack on the weld bead surface, ICR treatment can also extend the fatigue life of the weld root crack. However, the root crack propagates within the weld bead of the sole plate. Additionally, it was found that the re-propagation of fatigue cracks closed by ICR treatment can be detected through static strain monitoring.
