由於鋼結構具有高強度與高韌性，因此廣為現代建築使用之。而高溫下鋼材的軟化，是鋼結構火害設計中最主要的問題。如紐約世貿大樓在恐怖攻擊事件之後倒塌，乃因大樓之鋼骨結構受高溫火害後其強度大幅折減，這個災難說明鋼結構火害研究的重要性。但以往鋼結構火害相關的研究著重在鋼材高溫特性，以及鋼結構桿件在火害下之行為。本研究主要探討鋼構架火害下之行為，進行兩種不同型式之構架高溫行為試驗。第一組試驗為在一固定載重下進行加溫試驗，另一組研究則為在攝氏550度之高溫下施加載重。而在研究過程中若構架產生過大變形或斷裂時則視其已到達極限破壞。本研究並同時輔以分析驗證鋼結構火害之非線性行為，其分析與試驗結果甚為吻合，再利用有限元素法探討多跨多層鋼構架受火害之行為，並依研究結果建議鋼構架之火害安全考量。

Due to its high strength and excellent ductility, steel is usually selected in the construction of modern building structures. However, the inherent weakness of steel under elevated temperature is the major concern in the fire safety design of steel buildings. For example, the collapse of the World Trade Center in New York City was due to the strength reduction of steel structure under the fire after the attack by the terrorist. This disaster arose the need that more efforts should be made to ensure the safety of steel building under fire events. Previous researches on the behavior of steel structures were emphasized on the characteristics of steel material at elevated temperature, or the behavior of steel member during the fire events. This reported research is aimed at studying the behavior of steel frames under fire events. Steel frames were examined under two different types of fire load. The first frame was under a constant load and then subjected to the increase of temperature. The other frame was subjected to a constant temperature of 550℃ and then increasing the magnitude of the load. The steel frames were considered have reached their ultimate state when excessive deflection or fracture occurred. Analytical studies were also carried out to examine the nonlinear behavior of steel frames under fire events. Good correlations were found between the analytical and experimental studies. The finite element method was also adopted in the study of fire resistance of multi-bay and multistory steel frames. Based on these studies, recommendations are made for the safety of steel frames under fire.

1.Kazunori Harada「Structural Fire Resistance Design Under New Building Standards Law Of Japan」Departmene of Architecture & Environmental Design,Kyoto University
2.J Y Richard Liew, 「Advance Analysis And Behaviour of Steel Structures In Firse」,Department of Civil Engineering,National University of Singapore
3.J Y Richard Liew, 「Advance Analysis for Performance-base Design of Steel Structures in Fire」, 3rd International Symposium on Steel Structures 10-11 March 2005,Seoul,Korea
4.Guo-Qiang Li and Shi-Xiong Guo, 「Analysis of Restrained Steel Beams Subjected To Temperature Increasing And Descending」3rd International Symposium on Steel Structures 10-11 March 2005,Seoul,Korea
5.Bailey/Moore, 「The structural behavior of steel frames with composite floorslabs subject to fire：Part 1：Theory」Journal Of Structural Engineering, Vol. 78, No. 11 6 July, 2000
6.K.H Tan,T.C.Fung and W.S Toh, 「Fire Resistance of Steel Frames Using Classical And Numerical Methods」
7.Jean-Marc Franssen*，＂Failure temperature of a system comprising a restrained column submitted to fire ＂， Fire Safety Journal， Vol. 34 P.P.191〜207，2000。
8.Ulter.M.Lawson, 「Behavior of steel beam-to-column connections in fire 」Journal Of Structural Engineering, Vol. 68, No. 14/17 July, 1990
9.T.C.H.Liu, 「Fire resistance of unprotected steel beams with moment connections」Journal Of Constructional Steel Research 51(1999) 61-77
10.P.Makelainen and J.Outinen,「Behaviour of Structural Steel At Elevated Temperatures
11.K. Y. Ma, J. Y. Richard, 「Nonlinear Plastic Hinge Analysis of Three-Dimensional Steel Frames in Fire」, Journal Of Structural Engineering, Vol. 130, No. 7, July, 2004, pp.981-990.
12.K.S.A1-Jabri,I.W.Burgess,T.Lennon,R.J.Plank「Moment-rotationt- temperature curves for semi-rigid joints」Journal Of Constructional Steel Research 61(2005)281-303
13.李國強、王永昌「2001上海鋼結構防火技術國際研討會」暨第一屆全國鋼結構防火技術研討會論文集
14.王學謙、劉方匡「建築防火設計手冊」中國建築工業出版社出版1998年5月一版
15.李國強、蔣首超、林桂祥著「鋼結構抗火計算與設計」中國建築工業出版社出版1999年6月一版
16.許獻鍾「高溫中鋼結構之行為」，碩士論文，朝陽科技大學營建工程系，民國九十二年七月
17.張學誠，「巨型銲接箱型柱之結構行為」，博士論文，國立台灣科技大學營建工程系，民國八十三年一月。
18.方朝俊，「火害對耐火鋼構材銲接及栓接行為之影響」，碩士論文，國立台灣科技大學營建工程系，民國八十九年七月。
19.林村棋，「耐火鋼箱型鋼柱受火害之局部挫屈」，碩士論文，國立台灣科技大學營建工程系，民國九十二年七月。
20.簡丞宏，「H型鋼柱高溫整體結構行為研究」，碩士論文，國立高雄第一科技大學營建工程系，民國九十四年七月。
21.曾冠華，「耐火鋼箱型鋼柱受火害之行為」碩士論文，國立台灣科技大學營建工程系，民國九十四年五月。
22.陳生金，「鋼結構設計」，科技圖書，民國九十年九月
23.內政部營建署，「鋼結構容許應力設計法規範及解說」，民國九十年一月
24.ANSYS 8.1版 ，ANSYS， Inc. USA。