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Abstract: In this paper, we propose a probabilistic method for analysing the collapse time of steel frame structures in a fire. The method considers the uncertainty of influencing factors. Tornado diagrams are used for sensitivity analysis of random variables. Structural analysis samples are selected by monte Carlo method, and the collapse times of different structural samples are calculated by fire time history analysis. A collapse time fragility curve is fitted according to the calculated collapse times of the samples. A reliability index of the collapse time is used as a quantitative standard to evaluate the collapse performance of a steel frame in a fire. Finally, this method is applied to analyse the collapse time fragility of an eight-storey 3D steel frame structure under different compartment fire scenarios and fire protection levels. According to the collapse time fragility curve, the effects of the different fire scenarios and protection levels on the collapse resistance of the structure under fire are evaluated.

火灾场景下的钢框架结构倒塌概率分析

[1]Agarwal A, Varma AH, 2014. Fire induced progressive collapse of steel building structures: the role of interior gravity columns. Engineering Structures, 58:129-140.

[2]BS (British Steel), 1999. The Behaviour of Multi-storey Steel Framed Buildings in Fire. BS, Swinden Technology Centre, Rotherham, UK.

[3]CEN (European Committee for Standardization), 2002. Eurocode 1: Actions on Structures—Part 1.2: General Actions—Actions on Structures Exposed to Fire, EN 1991-1-2-2002. CEN, Brussels, Belgium.

[4]CEN (European Committee for Standardization), 2004. Eurocode 2: Design of Concrete Structures—Part 1.2: General Rules—Structural Fire Design, EN 1992-1-2-2004. CEN, Brussels, Belgium.

[5]CEN (European Committee for Standardization), 2005. Eurocode 3: Design of Steel Structures—Part 1.2: General Rules—Structural Fire Design, EN 1993-1-2-2005. CEN, Brussels, Belgium.

[6]Chen J, Jin WL, 2008. Behaviour of cold-formed stainless steel beams at elevated temperatures. Journal of Zhejiang University-SCIENCE A, 9(11):1507-1513.

[7]Chen SC, Zhang Y, Yan WM, et al., 2016. Experimental study and analysis on the collapse behavior of an interior column in a steel structure under local fire. Advances in Structural Engineering, 19(2):173-186.

[8]Ding Y, Song XR, Zhu HT, 2017. Probabilistic progressive collapse analysis of steel-concrete composite floor systems. Journal of Constructional Steel Research, 129:129-140.

[9]Dwaikat MMS, Kodur VKR, Quiel SE, et al., 2011. Experimental behavior of steel beam-columns subjected to fire-induced thermal gradients. Journal of Constructional Steel Research, 67(1):30-38.

[10]Gernay T, Khorasani NE, Garlock M, 2019. Fire fragility functions for steel frame buildings: sensitivity analysis and reliability framework. Fire Technology, 55(4):1175-1210.

[11]GSA (General Services Administration), 2003. Progressive Collapse Analysis and Design Guidelines for New Federal Office Buildings and Major Modernization Projects. GSA, USA.

[12]Guo QR, Jeffers AE, 2015. Finite-element reliability analysis of structures subjected to fire. Journal of Structural Engineering, 141(4):04014129.

[13]Huang ZH, Burgess IW, Plank RJ, 2003. Modeling membrane action of concrete slabs in composite buildings in fire. I: theoretical development. Journal of Structural Engineering, 129(8):1093-1102.

[14]ISO (International Organization for Standardization), 1999. Fire-resistance Tests—Elements of Building Construction —Part 1: General Requirements, ISO 834-1:1999. International Organization for Standardization, Geneva, Switzerland.

[15]Jiang BH, Li GQ, Li LL, et al., 2018. Experimental studies on progressive collapse resistance of steel moment frames under localized furnace loading. Journal of Structural Engineering, 144(2):04017190.

[16]Jiang J, Usmani A, 2013. Modeling of steel frame structures in fire using OpenSees. Computers & Structures, 118:90-99.

[17]Jiang J, Li GQ, 2017a. Disproportionate collapse of 3D steel-framed structures exposed to various compartment fires. Journal of Constructional Steel Research, 138:594-607.

[18]Jiang J, Li GQ, 2017b. Progressive collapse analysis of 3D steel frames with concrete slabs exposed to localized fire. Engineering Structures, 149:21-34.

[19]Kodur V, Dwaikat M, Fike R, 2010. High-temperature properties of steel for fire resistance modeling of structures. Journal of Materials in Civil Engineering, 22(5):423-434.

[20]Kumar A, Matsagar V, 2018. Blast fragility and sensitivity analyses of steel moment frames with plan irregularities. International Journal of Steel Structures, 18(5):1684-1698.

[21]Lange D, Devaney S, Usmani A, 2014. An application of the PEER performance based earthquake engineering framework to structures in fire. Engineering Structures, 66:100-115.

[22]Porter K, Kennedy R, Bachman R, 2007. Creating fragility functions for performance-based earthquake engineering. Earthquake Spectra, 23(2):471-489.

[23]Quan G, Huang SS, Burgess I, 2017. The behaviour and effects of beam-end buckling in fire using a component-based method. Engineering Structures, 139:15-30.

[24]Ren W, 2020. Behaviour of steel frames exposed to different fire spread scenarios. International Journal of Steel Structures, 20(2):636-654.

[25]Shrivastava M, Abu A, Dhakal R, et al., 2019. State-of-the-art of probabilistic performance based structural fire engineering. Journal of Structural Fire Engineering, 10(2):175-192.

[26]Sun RR, Huang ZH, Burgess IW, 2012. Progressive collapse analysis of steel structures under fire conditions. Engineering Structures, 34:400-413.

[27]Wang YC, 2000. An analysis of the global structural behaviour of the Cardington steel-framed building during the two BRE fire tests. Engineering Structures, 22(5):401-412.

[28]Wiśniewski DF, Cruz PJS, Henriques AAR, et al., 2012. Probabilistic models for mechanical properties of concrete, reinforcing steel and pre-stressing steel. Structure and Infrastructure Engineering, 8(2):111-123.