Cyclic friction-slip behaviour of G350-steel bolted connections

In this study, an experimental program was performed to investigate the cyclic friction-slip behaviour of AS/NZS 3678–350 (G350) steel with different surface finishes. Fifteen bolted connections consisting EN 1090–2 slip factor test assemblies M16 bolts were prepared and tested five commonly used finishes including inorganic zinc silicate (IZS), epoxy primer (EZP), aliphatic acrylic polyurethane (PUR), abrasive blasted (SA2), clean mill scale (CMS). The first initial force-slip stiffness are reported for each finish compared existing literature design standards. An empirical model is proposed predict based on stiffness, its accuracy demonstrated coated uncoated steel. effects load then considered, evaluated discussed. Finally, corresponding models as a function cumulative displacement.