This study focused on the stresses in a reduced-thickness plate repaired by a onesided patch plate with a high-strength bolted joint under axial loading. First, the stresses in the thickness-reduced plate repaired by the one-sided patch plate were evaluated by finite element analysis. As a result, it was found that the stress distribution in the thickness-reduced plate was different from that in the composite theory of defected section with patch plate. The stresses in the thickness-reduced plate repaired by the one-sided patch plate under axial loading were estimated by the frame structure analysis, and the results showed a similar tendency to that calculated by FE results. Finally, the tensile tests were conducted to verify each analysis result.
