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Abstract This paper first investigates the material ductility effect on the bearing strength of bolted connections in mild steel (S275), high strength steel (G550) and ultra-high strength steel (S1150), the latter having never been tested in the literature. Importantly, it also investigates the effects of different cooling methods on the post-fire bearing strength of ultra-high strength steel specimens. The specimens were cooled in either air or water from temperatures as high as 1000 °C, resulting in a very wide range of material ductility. It was found that material ductility (and therefor...

Abstract The block shear equation in the current Australasian and amended North American cold-formed steel design specifications is based on shear yielding without strain hardening, while that in the new Aluminum Design Manual assumes full shear strain hardening. This study investigates the range of applicability for both assumptions through experimental tests involving ultra-high strength steel bolted connections at room (ambient) and elevated temperatures, where the levels of material ductility are vastly different from each other. The experimental program has found that the block shear cap...