CORROSION BEHAVIOR OF SPLICED PLATE AND SLIP RESISTANCE IN HIGH STRENGTH BOLTED CONNECTIONS

Abstract

 For the maintenances of high strength bolted connections in actual steel bridges, it is required to clarify the relationship between corrosion behaviors of individual parts of fastener and slip resistance. This paper presents a study on relationship between corrosion behaviors of spliced plates and slip resistance. In this study, firstly the corrosion behavior is inspected using the corroded spliced plates which were cut off from the steel bridge girder removed. Moreover, the pressure distribution tests under the axial force of a high strength bolt and various tensile tests are performed on those corroded specimens.
 From the test results, it can be clear that the yield of back side of a bolt hole, i.e., the side subjected to compression force in the bolt hole and slip resistance correlate closely with each other. Moreover, the diagnostics for corroded spliced plate of friction type of high strength bolted connections are proposed.