Epoxy adhesive is often used for making the recess of corroded plate flat in the repair of the plate using high-strength bolts. The slip strength and mechanical behavior of the combined joints with high-strength bolts and adhesive is unclear. In this study, tensile tests of the combined joints, which vary a bolt pitch, have been conducted to clarify the slip strength and slip mechanism. FEA was carried out to evaluate quantitatively the slip strength of the combined joints. In result, the slip strength of the combined joints is larger than frictional joints even if narrow bolt pitch. As the bolt pitch and the thickness of connecting plates increase, the slip coefficient becomes larger.
