AN EXPERIMENTAL STUDY ON SLIP RESISTANCE OF HIGH STRENGTH BOLTED CONNECTIONS WITH PRE-SLIDE CONTACT SURFACES

Abstract

Slip coefficients of high strength bolted connections with pre-slide contact surfaces are important issue to be considered when combined connections of welded joints and bolted joints are used for the connections in I-section girders. In this paper, the slip coefficients of bolted joints，which slid on the condition of bolts being tightened up to 60％ of design level and then the bolts were tightened up to the deign level are discussed through a series of experiments in which the direction and the amount of pre-slide are set as the parameters. The test results suggest that the slip coefficient ofjoints with pre-slide contact surfaces is lower than that of the bolted connections without pre-slide surfaces，but the differences are about 20％ at most.