Elastic mechanical behavior of spliced joints assembled by fillet welding and bonding

Abstract

For repair and reinforcement of steel structural members, patch plate by bolting is generally used. However, welding is not used for patch plate repair because fatigue cracks are anticipated to occur from the welded part between the existing members and the patch plates. In order to solve this problem, it was examined whether the stress around the fillet welded parts of spliced joints was reduced or not by assist with bonding. The tensile static strength and the elastic mechanical behavior of the spliced joints assembled by fillet welding and bonding were investigated through a series of experiments and analyses. The elastic analysis model for spliced joints by welding and bonding was proposed with considering the change of mechanical properties of the bond due to high temperature during welding. From the results of elastic analysis, the possibility was confirmed that the stress around the weld toe and the weld root of spliced joints became small compared with those of joints by only welding.