钢结构抗火安全研究现状与发展趋势

State-of-the-art and development trend of fire safety research on steel structures

火灾引起的高温严重降低建筑钢材的强度和刚度,从而造成钢结构损伤、严重破坏甚至倒塌。20世纪90年代人们开始重视钢结构抗火理论研究,2001年美国"9·11"事件引起了世界各国对钢结构抗火问题的高度关注。结构抗火学科经过几十年的发展,已形成系统的抗火理论和设计方法,文章介绍火灾引起钢结构破坏的原因,论述结构抗火设计原则的发展过程,归纳近年来钢结构抗火研究的重大进展,指出钢结构抗火的重要发展趋势,供有关研究者参考。

High temperature induced by fire significantly reduces strength and stiffness of structural steels, and leads to structural damage, serious failure or collapse. People begin to pay attention to research on fire resistance design theory of steel structures in nineties of last c, entury. Fire resistance problem of steel structures was focused around the world after ＂9 · 11 attack＂ happened in US in 2001. Through development in last several decades, comprehensive design theories and methods have come into being in structural fire engineering. In this paper, the reasons of the fire leading to damage of steel structures were introduced and the development of fire resistance design principles was discussed. The great research progress and key research trends in fire resistance of steel structures were concluded. It may be helpful for relevant researchers.