This paper focuses on the mechanical slip behavior of box girder bolted connections consisting of slip-critical flange and web joints. Girder bolted connections resist the applied bending moment through the cooperation of flange and web resistances, which is called cooperative mechanisms. In the present study, FE analysis of steel box girder bolted connections was conducted to evaluate the slip strength considering the cooperative mechanism. As a result, it was confirmed that the box girder bolted connections had cooperative resistance mechanisms. In all cases, the overall slip strength was larger than 95% of the design overall slip resistance.
