Fatigue crack repair method of steel structures

摘要

The present invention together with is applicable to very early stage fatigue cracks that occurred in the steel structures, the fatigue cracks are simple and can be inexpensively repaired, stopping the development of fatigue crack , or to provide a fatigue crack repair method which can be made of the life-prolonging fatigue life of steel structures and delaying the development of fatigue cracks. The plastic deformation was applied to the surface of the steel plate 1 by parallel to peening and A fatigue crack 3 at least one side of the both sides of the fatigue crack 3 of the surface of the steel sheet 1, of the fatigue crack 3 and has a fatigue crack around peening forming a cleft contact surface 3a have closed the opening. More preferably, the process after the fatigue crack around peening process, a plastic deformation was applied to the surface of the steel plate 1 by peening the above the fatigue crack 3, the contact area of ​​the crack contact surfaces 3a and / or contact I have a fatigue on the peening process to increase the pressure. [Selection Figure] Figure 1