Slip Resistance Tests of Friction-Type High-Strength Bolted Joints with One Faying Surface Roughened by Various Power Tools and the Other Painted by Inorganic Zinc-Rich Paint

Abstract

According to the Specifications for Highway Bridges, the slip coefficient of high-strength bolted friction type joints is specified as 0.4 when both of faying surfaces of the base metal and the splice plate are rough steel surface, and it is 0.45 when both surfaces are painted with inorganic zinc rich paint. In this study, slip tests were carried out for the joint whose splice plates are painted with the inorganic zinc rich paint of a thickness more than 100 μm and base plates have rough steel surfaces by different power tools. As a result, the slip coefficient was found to be more than 0.5 for all specimen types.