TEST OF UNDERSIDE OF REPAIR METHOD FOR BEAD-PENETRATING CRACK IN ORTHOTROPIC STEEL DECK STIFFENED BY CLOSED SECTION RIBS

Abstract

 In orthotropic steel decks stiffened by closed section ribs, fatigue cracks resulting from large vehicles have been observed with the increase of the service years. The cracks found in trough-deck welds are bead-penetrating type. Several repair methods have been studied for these bead-penetrating cracks so far. However, effective methods that is applicable from the underside of the deck are still under development. In this paper, development of the repair method using Thread Rolling Screw from the underside of the deck and fatigue test results are described.