Huck High-Strength One-Side Bolt (hereinafter, referred to as “MUTF”) is one of the most-used blind bolts for repaired and strengthened of members in Japanese existing structures. However, there are few examples of studies focused on contact pressure and ultimate limit state in frictional joints with MUTF. In this study, slip and after-slip behavior in the joints were examined by contact pressure tests and tensile tests. As a result, the slip coefficients in the joints with MUTF and thin splice plate are about 0.10 smaller than the others because the contact pressure is higher. Also, the ultimate strengths in the joints which have a shear surface on the bulb sleeve are much more than the designed value.
