2016 Volume 23 Issue 92 Pages 92_13-92_19
Slip coefficient of high-strength bolt friction joints is well known to depend on the condition of contact surfaces. As for high-strength bolt friction joints of hot-dip galvanized coating, their contact surfaces have been widely treated by grid blast or phosphate. However, the slip coefficient with grinding treatment friction surfaces of hot-dip galvanized coating is not clear. In this study, the friction type of high strength bolted connection specimens were made on SS400 steel plates, in which contact surfaces are grinding treatment friction surfaces of hot-dip galvanized coating, then slip tests and relaxation tests were carried out on these specimens. On the basis of above examinations, the slip coefficient with grinding treatment surfaces is clarified.