Experimental study on high strength structural steel S460 in fire and after cooling down

摘要

In order to reveal more information on material behaviour of high strength structural steel S460 both in fire and after fire, an experimental research has been carried out. The elastic modulus, yield strength and ultimate strength of S460 in fire and after cooling down are presented herein. A comparison study with current European, American, British and Australian design standards of steel structures shows that the material behaviour of high strength steel S460 in fire is different from mild steels and the current leading design standards are not applicable to high strength steel S460. This paper highlights the necessity of employing a unique elevated-temperature and post-fire material behaviour of high strength steel S460 to conduct safe fire-resistance design and evaluation after fire on steel structures with S460. Moreover, the residual material behaviour of high strength steel S460 after cooling down is found promising for its reuse.