A NEW CURVE FOR TEMPERATURE-TIME RELATIONSHIP IN COMPARTMENT FIRE

Abstract

An idealized temperature curve of compartment fire has three, distinct phases: growth phase, steady-burning (or fully developed) phase, and decay phase. Standard temperature-time curves are not suitable for describing the fire phenomena because it does not take into account fire load nor ventilation conditions, and fire according to these curves never decays. The temperature curve of compartment fire, especially the growth phase, may be treated like pulse phenomena. This means that it is possible to approximate the fire development with some suitable function that satisfactory describes the pulse phenomena. The shape of the time-temperature curve for fire with flashover has characteristic peak before the decay phase, or slow decreases before the decay phase - in absence of flashover. In this paper we propose the definition of the time-temperature curve by means of a unique function in which the quantities of fuel and ventilation conditions are defined with parameters. This function is very convenient for approximation of the development of compartment fire with flashover, for smouldering combustion which has fire curve without characteristic peak, this function can be used only for approximation of growth period of fire.

Keywords

Dates

  • Submission Date2010-09-27
  • Revision Date2011-01-09
  • Acceptance Date2011-03-15

DOI Reference

10.2298/TSCI100927021B

References

  1. Abramowitz, M., Stengun, I., Handbook of mathematical functions, Dover publications, New York, 1964
  2. Barnett, C.R., BDF curve: a new empirical model for fire compartment temperatures, Fire Safety Journal, No. 37 (2002), pp. 437-463
  3. Barnett, C.R., Clifton G.C., Examples of fire engineering design for steel members, using a standard curve versus a new parametric curve, Fire and Materials, Vol. 28, No. 2-4 (2004), pp. 309-322
  4. Barnett, C.R., Replacing international temperature-time curves with BDF curve, Fire Safety Journal, No. 42 (2007), pp. 321-327
  5. Blagojevich, M., Petkovich, D., Simich D.: A new algorithm for adaptive alarm threshold in fire detection system, Proceedings, 12th International conference on automatic fire detection - AUBE 2001., Maryland USA, 2001, pp. 201-209. 14 of 16
  6. Blagojevich, M., Petkovich, D., Detecting fire in early stage-a new approach, Facta Universitatis, Series: Working and Living Environmental Protection, Vol. 2, No 1 (2001), pp. 19-26
  7. Bukowski, R.: Fire models: the future is now!, NFPA journal, Vol. 85, No. 2 (1991) pp. 60-62, 64, 66-69
  8. Cooper, L., Steckler, K.: Methodology for Developing and Implementing Alternative Temperature-Time Curves for Testing the Fire Resistance of Barriers for Nuclear Power Plant Applications, NISTIR 5842, NIST, USA, 1996
  9. Drysdale, D., An Introduction to Fire Dynamics, 2nd edition, John Willey & Sons Ltd., 1999
  10. Fitzgerald, R.W., Building Fire Performance Analysis, John Willey & Sons Ltd., 2004
  11. Fletcher, E.A. et al., Behaviour of concrete structures in fire, Thermal Science, Vol. 11 (2007), No. 2, pp. 37-52
  12. Gillie M., Fire Modelling - A Structural Engineering Perspective, The University of Edinbourgh, http:// http://people.fsv.cvut.cz/
  13. Harmathy, T.Z., Design to Cope with Fully Developed Fires, ASTM Special Technical Publication No. 685 (1979), pp. 198-276
  14. Harmathy, T.Z., A New Look at Compartment Fires, Parts I and II, Fire Technology, Vol. No. 3&4 (1972), pp.196-217 and pp.326-351
  15. Harmathy T.Z., "Postflashover Fires" - An Overview of the research at the National Research Council of (NRCC) 1970-1985, Fire Technology Vol. 22, No. 3 (1986), pp. 210-233
  16. Harmathy, T.Z., Sultan, M.A., Correlation Between the Severities of the ASTM 119 and ISO 834 Fire Exposures, Fire Safety Journal, Vol. 13, No. 2&3 (1988), pp. 163-168
  17. Harmathy, T.Z. and Mehaffey, J.R. 'Post-flashover Compartment Fires', Fire and Materials, Vol. 7, No. 2 (1983), pp 49 - 61
  18. Janssens, L. M.: Heat release rate (HRR), FORUM Workshop of Measurement Needs for Fire Safety, NIST, USA, 2000
  19. Jones, W.W, Forney, P. G., Comparison of CFAST prediction to real-scale-fire tests, Proceedings of Fire Safety Conference on Performance Based Concepts, Switzerland, 1996
  20. Karlsson B., Quintiere, G. J., Enclosure Fire Dynamics, CRC Press, 2000
  21. Kodur, V., Performance-based design of structural steel for fire conditions: a calculation methodology, ASCE Publications, 2009
  22. Konicek, L., Lie, T.T., Temperature Tables for Ventilation Controlled Fires, Building Research Note, NRC Institute for Research in Construction of Canada, No. 94, c. 2, Canada, 1974.
  23. Lie, T.T., Characteristic temperature curves for various fire severities, Fire Technology, Vol. 10, No. 4. (1974), pp. 315-326
  24. Lie, T.T., Stanzak ,W.W., Structural Steel and Fire - More Realistic Analysis, AISC Engineering Journal, Vol. 13, No. 2 (1976), pp. 35-42
  25. Lie, T.T., Fire Temperature-Time Relations, SFPE Handbook of Fire Protection Engineering, third edition, 2002, pp. 4-205
  26. Magnusson, S.E. and Thelandersson S., Temperature-Time Curves of Complete Process of Fire Development, Theoretical study of wood fuel fires in enclosed spaces, Acta Polytechnica Scandinavia Civil Engineering and Building Construction Series No. 65, Stockholm, (1970). 15 of 16
  27. Pitts, M.W., Temperature measurements in fire, Proceedings of FORUM Workshop on Measurement Needs for Fire Safety, NISTIR 6527, NIST, USA, 2000
  28. Purkiss, J. A., Fire Safety Engineering - design of structures, 2nd edition, Elsevier, 2007
  29. Quintiere, G. J., Compartment Fires, in: Fundamentals of Fire Phenomena, John Willey & Sons, Ltd., 2006, pp. 339-376
  30. Stern-Gottfried, J. et al., Experimental review of the homogeneous temperature assumption in post-flashover compartment fires, Fire Safety Journal, Vol. 45, No. 4., (2010), pp. 249-261
  31. Szoke, S., Structural concrete in Fire Exposures, Structure magazine, 2007
  32. Xu, Q., et al., Test of Total Heat Flux from Wood Crib Fire in and outside compartment, Thermal Science, Vol. 11 (2007), No. 2, pp. 197-206
  33. Welch, S., et al., BRE large compartment fire tests - characterising post-flashover fires for model validation, www.era.lib.ed.ac.uk
  34. Ingberg, S.H., Tests of the severity of building fires, nvl.nist.gov/pub/nistpubs/
  35. ***. BS EN1991-1-2:2002, Eurocode 1: Actions on structures, Part 1-2: General actions on structures exposed to fire
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