INVESTIGATION OF BOLT AXIAL FORCES AND MECHANICAL PROPERTIES ON TORSHEAR TYPE HIGH STRENGTH WEATHERING BOLTS OF 22 mm DIAMETER

Abstract

 Torshear type high strength weathering bolts are widely used to bolted joints in steel bridges. It is known that their bolts vary widely bolt axial force by temperature. However, characteristics of bolt axial force is not clarified. In this paper, we have investigated the 2860 of bolt axial forces on the basis of the mill sheet data and bolt-tightening tests data in order to clarify bolt axial force on torshear type high strength weathering bolts of 22 mm diameter. We also have investigated the mechanical properties of their bolts.