Thermal response of steel framing members in open car park fires
Xia YAN1, Marion CHARLIER2, Thomas GERNAY1()
1. Department of Civil and Systems Engineering, Johns Hopkins University, Baltimore, MD 21218, USA 2. ArcelorMittal Steligence, Esch-sur-Alzette 4221, Luxembourg
For open car park structures, adopting a performance-based structural fire design is often justified and allowed because the fire does not reach flashover. However, this design approach requires an accurate assessment of temperatures in structural members exposed to car fires. This paper describes a numerical study on the thermal exposure on steel framing members in open car park fires. Steel temperatures are computed by the coupling of computational fluid dynamics and finite element modeling, and by analytical models from the Eurocodes. In addition, the influence of galvanization on the steel temperature evolution is assessed. Results show that temperatures in unprotected beams and columns are influenced by the section geometry, car fire scenario, modeling approach, and use of galvanization. Galvanization slightly delays and reduces peak temperature. Regarding the different models, CFD-FEM (CFD: computational fluid dynamics, FEM: finite-element method) coupled models predict lower temperatures than the Hasemi model, because the latter conservatively assumes that the fire flame continuously touches the ceiling. Further, the Hasemi model cannot account for the effect of reduced emissivity from galvanization on the absorbed heat flux. Detailed temperature distributions obtained in the steel members can be used to complete efficient structural fire designs based on the member sections, structure layout, and use of galvanization.
. [J]. Frontiers of Structural and Civil Engineering, 2022, 16(9): 1071-1088.
Xia YAN, Marion CHARLIER, Thomas GERNAY. Thermal response of steel framing members in open car park fires. Front. Struct. Civ. Eng., 2022, 16(9): 1071-1088.
B ZhaoM Roosefid. Guide for Verification of the Fire Behavior of Largely Ventilated Car Parks with Metal Superstructure. CTICM document (SRI-11/110h-MR-BZ/NB), 2014 (in French)
2
J Mangs, O Keski-Rahkonen. Characterization of the fire behaviour of a burning passenger car. Part I: Car fire experiments. Fire Safety Journal, 1994, 23(1): 17–35 https://doi.org/10.1016/0379-7112(94)90059-0
3
D D MacneilG LougheedC LamG CarbonneauR KroekerD EdwardsJ TompkinsG Lalime. Electric vehicle fire testing. In: 8th EVS-GTR Meeting. Washington, D.C.: National Research Council Canada, 2015
4
B Zhao, J Kruppa. Structural behaviour of an open car park under real fire scenarios. Fire and Materials, 2004, 28(24): 269–280 https://doi.org/10.1002/fam.867
5
D Joyeux. Natural Fires in Closed Car Parks—Car Fire Tests. INC-96/294d-DJ/NB, 1997
A PchelintsevY HasemiT WakarnatsuY Yokobayashi. Experimental and numerical study on the behaviour of a steel beam under ceiling exposed to a localized fire. In: Fire Safety Science-Proceedings of the 5th International Symposium. Melbourne: IAFSS, 1997
8
N Tondini, C Thauvoye, F Hanus, O Vassart. Development of an analytical model to predict the radiative heat flux to a vertical element due to a localised fire. Fire Safety Journal, 2019, 105: 227–243 https://doi.org/10.1016/j.firesaf.2019.03.001
9
K McGrattanS HostikkaR McDermottJ FloydC WeinschenkK Overholt. Fire Dynamics Simulator User’S Guide. Gaithersburg: NIST Special Publication, 2013
10
J Alos-Moya, I Paya-Zaforteza, A Hospitaler, E Loma-Ossorio. Valencia bridge fire tests: Validation of simplified and advanced numerical approaches to model bridge fire scenarios. Advances in Engineering Software, 2019, 128: 55–68 https://doi.org/10.1016/j.advengsoft.2018.11.003
11
J Alos-Moya, I Paya-Zaforteza, M E M Garlock, E Loma-Ossorio, D Schiffner, A Hospitaler. Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models. Engineering Structures, 2014, 68: 96–110 https://doi.org/10.1016/j.engstruct.2014.02.022
12
Q Guo, K J Root, A Carlton, S E Quiel, C J Naito. Framework for rapid prediction of fire-induced heat flux on concrete tunnel liners with curved ceilings. Fire Safety Journal, 2019, 109: 102866 https://doi.org/10.1016/j.firesaf.2019.102866
13
S E Quiel, T Yokoyama, L S Bregman, K A Mueller, S M Marjanishvili. A streamlined framework for calculating the response of steel-supported bridges to open-air tanker truck fires. Fire Safety Journal, 2015, 73: 63–75 https://doi.org/10.1016/j.firesaf.2015.03.004
14
N HuaA TessariN Elhami-Khorasani. Quantifying Uncertainties in the Temperature–Time Evolution of Railway Tunnel Fires. New York: Springer US, 2021
15
X Yan, T Gernay. Numerical modeling of localized fire exposures on structures using FDS-FEM and simple models. Engineering Structures, 2021, 246: 112997 https://doi.org/10.1016/j.engstruct.2021.112997
16
A A Khan, Z Nan, L Jiang, V Gupta, S Chen, M A Khan, J Hidalgo, A Usmani. Model characterisation of localised burning impact from localised fire tests to travelling fire scenarios. Journal of Building Engineering, 2022, 54: 104601 https://doi.org/10.1016/j.jobe.2022.104601
17
J P Hidalgo, T Goode, V Gupta, A Cowlard, C Abecassis-Empis, J Maclean, A I Bartlett, C Maluk, J M Montalvá, A F Osorio, J L Torero. The Malveira fire test: Full-scale demonstration of fire modes in open-plan compartments. Fire Safety Journal, 2019, 108: 102827 https://doi.org/10.1016/j.firesaf.2019.102827
18
A Nadjai, A Naveed, M Charlier, O Vassart, S Welsh, A Glorieux, J Sjostrom. Large scale fire test: The development of a travelling fire in open ventilation conditions and its influence on the surrounding steel structure. Fire Safety Journal, 2022, 130: 103575 https://doi.org/10.1016/j.firesaf.2022.103575
19
N Alam, A Nadjai, M Charlier, O Vassart, S Welch, J Sjöström, X Dai. Large scale travelling fire tests with open ventilation conditions and their effect on the surrounding steel structure—The second fire test. Journal of Constructional Steel Research, 2022, 188: 107032 https://doi.org/10.1016/j.jcsr.2021.107032
20
B Fettah. Fire Analysis of car park building structures. Thesis for the Master’s Degree. Bragança: Polytechnic Institute of Bragança, 2016
21
C Fang, B A Izzuddin, R Obiala, A Y Elghazouli, D A Nethercot. Robustness of multi-storey car parks under vehicle fire. Journal of Constructional Steel Research, 2012, 75: 72–84 https://doi.org/10.1016/j.jcsr.2012.03.004
22
M SommavillaN Tondini. Fire performance of a steel open car park in the light of the recent development of the localised fire model “LOCAFI”. In: The 11th International Conference on Structures in Fire. Brisbane: The University of Queensland, 2020
23
X G Zhang, Y C Guo, C K Chan, W Y Lin. Numerical simulations on fire spread and smoke movement in an underground car park. Building and Environment, 2007, 42(10): 3466–3475 https://doi.org/10.1016/j.buildenv.2006.11.002
24
E Annerel, L Taerwe, B Merci, D Jansen, P Bamonte, R Felicetti. Thermo-mechanical analysis of an underground car park structure exposed to fire. Fire Safety Journal, 2013, 57: 96–106 https://doi.org/10.1016/j.firesaf.2012.07.006
25
N Tondini, A Morbioli, O Vassart, S Lechêne, J M Franssen. An integrated modelling strategy between a CFD and an FE software: Methodology and application to compartment fires. Journal of Structural Fire Engineering, 2016, 7(3): 217–233 https://doi.org/10.1108/JSFE-09-2016-015
26
ECCS. Fire Safety in Open Car Parks: Modern Fire Engineering. European Convention for Constructional Steelwork, 1993
27
1993-1-2 EN. Eurocode 3: Design oF Steel Structures––Part 1-2: General Rules—Structural Fire Design. Brussels: European Committee for Standardization, 2005
28
D JoyeuxJ KruppaL G CajotJ B SchleichP van de LeurL Twilt. Demonstration of Real Fire Tests in Car Parks and High Buildings. EUR 20466. 2002
29
C Cwiklinski. Open Car Parks—Expert Opinion on Fire Scenarios Final report. INERIS DRA-CCw/MCh-2001-Cgr22984. 2001 (in French)
30
P C R Collier. Car parks—Fires involving Modern Cars and Stacking Systems. New Zealand, BRANZ Study Report 255. 2011
31
J F Cadorin, J M Franssen. A tool to design steel elements submitted to compartment fires—OZone V2. Part 1: pre-and post-flashover compartment fire model. Fire Safety Journal, 2003, 38(5): 395–427 https://doi.org/10.1016/S0379-7112(03)00014-6
32
1991-1-2 EN. Eurocode 1: Actions on Structures––Part 1-2: General Actions––Actions on Structures Exposed to Fire. Brussels: European Committee for Standardization, 2002
33
U WickströmD DuthinhK McGrattan. Adiabatic surface temperature for calculating heat transfer to fire exposed structures. In: Proceedings of the Eleventh International Interflam Conference. London: Interscience Communications, 2007
34
U Wickström, S Hunt, B Lattimer, J Barnett, C Beyler. Technical comment—Ten fundamental principles on defining and expressing thermal exposure as boundary conditions in fire safety engineering. Fire and Materials, 2018, 42(8): 985–988 https://doi.org/10.1002/fam.2660
35
M Charlier, A Glorieux, X Dai, N Alam, S Welch, J Anderson, O Vassart, A Nadjai. Travelling fire experiments in steel-framed structure: Numerical investigations with CFD and FEM. Journal of Structural Fire Engineering, 2021, 12(3): 309–327
36
X Deckers, S Haga, N Tilley, B Merci. Smoke control in case of fire in a large car park: CFD simulations of full-scale configurations. Fire Safety Journal, 2013, 57: 22–34 https://doi.org/10.1016/j.firesaf.2012.02.005
37
J M Franssen, T Gernay. Modeling structures in fire with SAFIR®: theoretical background and capabilities. Journal of Structural Fire Engineering, 2017, 8(3): 300–323 https://doi.org/10.1108/JSFE-07-2016-0010
38
T Gernay, P Kotsovinos. Advanced analysis. In: International Handbook of Structural Fire Engineering. Cham: Springer, 2021, 413–467 https://doi.org/10.1007/978-3-030-77123-2_10
39
C BrasseurM ZahariaR ObialaR FranssenJ M HanusF ZhaoB PinteaD SanghoonH VassartO NadjaiA ScifoA Thauvoye. Temperature Assessment of a Vertical Steel Member Subjected to Localised Fire (LOCAFI). EUR 28577. 2017
40
X Yan, T Gernay. Structural fire design of load-bearing cold-formed steel assemblies from a prototype metal building. Structures, 2022, 41: 1266–1277
41
T Gernay, N E Khorasani. Recommendations for performance-based fire design of composite steel buildings using computational analysis. Journal of Constructional Steel Research, 2020, 166: 105906 https://doi.org/10.1016/j.jcsr.2019.105906
42
E119-18c ASTM. Standard Test Methods for Fire Tests of Building Construction and Materials. West Conshohocken, PA: ASTM, 2018
43
O Vassart, C G Bailey, M Hawes, A Nadjai, W I Simms, B Zhao, T Gernay, J M Franssen. Large-scale fire test of unprotected cellular beam acting in membrane action. Proceedings of the Institution of Civil Engineers, Structures and Buildings, 2012, 165(7): 327–334 https://doi.org/10.1680/stbu.11.00019