Abstract
The purpose of this study was to determine the effect of joint conditions on the slipping behavior of high-strength bolted GFRP (Glass Fiber Reinforced Polymer) frictional joints with hot-dip galvanized splice-plates. In this study, slip experiment and contact pressure test were conducted using the strip-type specimens, and the slip surfaces were observed using an electron microscope on the joint surfaces after the slip experiment. The joint conditions of the slip specimens were determined by the bolt axial force, bolt hole diameter, and surface treatment of the splice-plates and GFRP plates. Slip experiment results showed that phosphate treatment, roughening the surface properties of the splice-plates, and applying a fluoropolymer coating to the GFRP surface improved the slip resistance. The results of the contact pressure test and the observation of the slip surfaces indicated that the use of a low-hardness material for the surface treatment of the base metal improves the adhesion between the base metal and the splice-plate, which may increase the slipping behavior.
