Enhancing Fire Resistance of Steel Bridge Girders Using External Fire Insulation
https://doi.org/10.24017/science.2017.3.25
Abstract views: 1050 / PDF downloads: 767Abstract
Fire in steel bridges can be a significant hazard; however, no provisions are specified for fire resistance of bridge structural members in current codes and standards. This paper presents results from numerical analysis on the response of steel bridge girders under fire conditions. A finite element model is developed to evaluate the fire resistance of typical steel girders in bridges using fire insulation with different configurations and thicknesses. The first configuration comprised of applying fire insulation on the web plate of the steel girder, while in the second configuration, the steel section is insulated. Results from numerical analysis indicate that fire resistance and failure mode in steel bridge girders is highly influenced by the insulation configuration and thickness. Applying 25.4mm fire insulation on web plate of steel bridge can increase the fire resistance up to 53 minutes, while applying same insulation thickness on steel section can result in 110 minutes fire resistance.
Keywords:
Bridge fires, fire resistance, steel bridge girders, finite element analysis.
References
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https://doi.org/10.3141/2172-03
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https://doi.org/10.1061/(ASCE)BE.1943-5592.0000412
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[4] NFPA 502. Standards for Road Tunnels, Bridges, and other Limited Access Highways. Edition 2011.
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https://doi.org/10.1016/j.jcsr.2013.04.007
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https://doi.org/10.1617/s11527-014-0262-2
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https://doi.org/10.1002/fam.2352
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https://doi.org/10.1016/j.jcsr.2016.01.004
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https://doi.org/10.3141/2172-03
[2] V.K. Kodur, E.M. Aziz, M.M. Dwaikat "Evaluating Fire Resistance of Steel Girders in Bridges". ASCE Journal of Bridge Engineering, vol. 18: pp. 633-643, 2013.
https://doi.org/10.1061/(ASCE)BE.1943-5592.0000412
[3] AASHTO. AASHTO LRFD Bridge Design Specifications. Edition 4, American Association of State Highway and Transportation Officials, Washington DC, 2007.
[4] NFPA 502. Standards for Road Tunnels, Bridges, and other Limited Access Highways. Edition 2011.
[5] E.M. Aziz, V.K. Kodur "An Approach for Evaluating the Residual Strength of Fire Exposed Bridge Girders". Journal of Constructional Steel Research, vol. 88: pp. 34-42, 2013.
https://doi.org/10.1016/j.jcsr.2013.04.007
[6] V. Vimonsatit, K. Tan, Z. Qian "Testing of Plate Girder Web Panel Loaded in Shear at Elevated Temperature". Journal of Structural Engineering, vol. 133(6): pp. 815-824, 2007.
https://doi.org/10.1061/(ASCE)0733-9445(2007)133:6(815)
[7] V.K. Kodur, E.M. Aziz "Effect of Temperature on Creep in ASTM A572 High-Strength Low-Alloy Steels". Journal of Materials and Structures, vol. 48(6): pp. 1669-1677, 2014.
https://doi.org/10.1617/s11527-014-0262-2
[8] E.M. Aziz, V.K. Kodur, J. D. Glassman, M. E. Garlock "Behavior of Steel Bridge Girders under Fire Conditions". Journal of Constructional Steel Research, vol. 106: pp. 11-22, 2015.
https://doi.org/10.1016/j.jcsr.2014.12.001
[9] E.M. Aziz, V.K. Kodur "Effect of Temperature and Cooling Regime on Mechanical Properties of High-Strength Low-Alloy Steel". Journal of Fire and Materials, vol. 40 (7): pp. 926-939, 2015.
https://doi.org/10.1002/fam.2352
[10] E.M. Aziz "Response of Fire Exposed Steel Bridge Girders". Dissertation (PhD) submitted to Department of Civil and Environmental Engineering, at Michigan State University, East Lansing, USA, 2015.
[11] J.D. Glassman, M.E. Garlock, E.M. Aziz, V.K. Kodur "Modeling Parameters for Predicting the Ultimate Postbuckling Shear Strength of Steel Plate Girders". Journal of Constructional Steel Research, vol. 121: pp. 136-143, 2016.
https://doi.org/10.1016/j.jcsr.2016.01.004
[12] E.M. Aziz, V.K. Kodur, M.Z. Naser "Strategies for Enhancing Fire Performance of Steel Bridges". Journal of Engineering Structures, vol. 131: pp. 446-458, 2016.
https://doi.org/10.1016/j.engstruct.2016.10.040
[13] ANSYS. ANSYS metaphysics. Version 14.5 ANSYS Inc. Canonsburg, PA, USA, 2013.
[14] European Committee for Standardization (CEN). EN 1991-1-2: 2002. Eurocode 1: Actions on Structures. Part 1.2 General Action-Action on Structures Exposed to Fire. CEN, Brussels, Belgium, 2002.
[15] European Committee for Standardization (CEN). EN 1992-1-2: 2004 Eurocode 2: Design of Concrete Structures. Part 1.2 General Rules-Structural Fire Design. CEN, Brussels, Belgium, 2004.
[16] European Committee for Standardization (CEN). EN 1993-1-2: 2005 Eurocode 3: "Design of Steel Structures. Part 1.2 General Rules-Structural Fire Design. CEN, Brussels, Belgium, 2005.
[17] D.E. Wainman, B.R. Kirby Compendium of UK Standard Fire Test Data for Unprotected Steel-1. Published by British Steel Technical and Swinden Laboratories, Rotherham, UK, 1989.
[18] V.K. Kodur, E.M. Aziz "Factors Governing Response of Steel Bridge Girders under Fire Conditions". Proceeding of 9th Structural in Fire (SIF) Conference. Princeton University, Princeton, USA, 2016.
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How to Cite
[1]
E. M. Aziz, “Enhancing Fire Resistance of Steel Bridge Girders Using External Fire Insulation”, KJAR, vol. 2, no. 3, pp. 315–319, Aug. 2017, doi: 10.24017/science.2017.3.25.
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Published
27-08-2017
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Section
Pure and Applied Science
