SLIP RESISTANCE TESTS OF FRICTION-TYPE HIGH-STRENGTH MULTI BOLTED JOINTS WITH UNCOATED CONTACT SURFACES ON THICK PLATE

Abstract

 In this paper, influence of number of rows of bolts and plate thickness on slip resistance is discussed based on the slip resistance tests. The slip resistance tests of high strength bolted friction type joints with uncoated contact surfaces were carried out for the test specimens which have combinations of 50/75mm thickness plates and 3/8/12 rows of bolts. As a result of these tests, it was observed that all the specimens had slip coefficients over 0.4 which is specified in the current deign code, Japanese Specification for Highway Bridges, and it is found that the slip resistance of the 12-row-specimens decreased approximately 3% compared with 8-row-specimens.