Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Numerical analysis of partially fire protected composite slabs

  • Zaharia, R. (The "Politehnica" University of Timisoara) ;
  • Vulcu, C. (The "Politehnica" University of Timisoara) ;
  • Vassart, O. (ArcelorMittal, Esch/Alzette) ;
  • Gernay, T. (University of Liege) ;
  • Franssen, J.M. (University of Liege)
  • Received : 2011.12.03
  • Accepted : 2012.11.13
  • Published : 2013.01.25
⟨ Previous Next ⟩

Abstract

The paper presents a numerical investigation, done with the computer program SAFIR, in order to obtain simpler finite element models for representing the behaviour of the partially protected composite steel concrete slabs in fire situations, considering the membrane action. Appropriate understanding and modelling of the particular behaviour of composite slabs allows a safe approach, but also substantial savings on the thermal insulation that has to be applied on the underlying steel structure. The influence of some critical parameters on the behaviour and fire resistance of composite slabs such as the amount of reinforcing steel, the thickness of the slab and the edge conditions is also highlighted. The results of the numerical analyses are compared with the results of three full scale fire tests on composite slabs that have been performed in recent years.

Keywords

References

  1. Abu, A.K., Burgess, I.W. and Plank, R.J. (2008), "Slab panel vertical support and tensile membrane action in fire", Steel Compos Struct, 8(3), 217-230. https://doi.org/10.12989/scs.2008.8.3.217
  2. Bailey, C.G. and Moore, D.B. (2000), "The structural behaviour of steel frames with composite floor slabs subjected to fire: Part 1: Theory", Struct Eng, 78, 9-26.
  3. Bailey, C.G. (2001), "Membrane action of unrestrained lightly reinforced concrete slabs at large displacements", Eng Struct, 23, 470-483. https://doi.org/10.1016/S0141-0296(00)00064-X
  4. Bailey, C.G. (2001), "Steel structures supporting composite floor slabs: design for fire", BRE Digest, 462
  5. Bailey , C.G., Lennon, T. and Moore, D. B. (2003), "The behaviour of a multi-storey composite steel framed building in fire", Struct Eng, 81/2, 27-36.
  6. Bailey, C.G. (2004), "Membrane action of slab/ beam composite floor systems in fire", Eng Struct, 26, 1691-1703. https://doi.org/10.1016/j.engstruct.2004.06.006
  7. Beard, A.N. (2000), "On a priori, blind and open comparisons between theory and experiment", Fire Safety J., 35, 63-66. https://doi.org/10.1016/S0379-7112(00)00015-1
  8. Cadorin, J.F. and Franssen, J.M. (2003), "A tool to design steel elements submitted to compartment fires - OZone V2. Part 1: Pre- and post-flashover compartment fire model", Fire Safety J, 38, 395-427. https://doi.org/10.1016/S0379-7112(03)00014-6
  9. Cadorin, J.F., Pintea, D., Dotreppe, J.C. and Franssen, J.M. (2003), "A tool to design steel elements submitted to compartment fires - OZone V2. Part 2: Methodology and application", Fire Safety J, Elsevier, 38, 429-451. https://doi.org/10.1016/S0379-7112(03)00015-8
  10. Chlouba, J. and Wald, F. (2009), "Connection temperatures during Mokrsko fire test", Acta Polytechnica, Czech Technical University Publishing House, 49(1), 76-81.
  11. COSSFIRE (2006), "Connection of Steel and Composite Structures Under Natural Fire Conditions", RFCS research project $N^{\circ}$ RFSR-CT-2006-00028.
  12. EN 1992-1-2 (2005), "Eurocode 2 - Design of concrete structures. Part 1-2. General rules - Structural Fire Design", CEN, Brussels.
  13. EN 1993-1-2 (2005), "Eurocode 3 - Design of steel structures. Part 1-2. General rules - Structural Fire Design", CEN, Brussels.
  14. EN 1994-1-2 (2005), "Eurocode 4 - Design of composite steel and concrete structures. Part 1-2. General rules - Structural Fire Design", CEN, Brussels.
  15. Franssen, J.M. (2005), "SAFIR - A thermal/structural program modelling structures under fire", Eng J Aisc, 42(3), 143-158.
  16. Huang, Z., Burgess, I.W. and Plank, R.J. (2002), "Modelling of six full-scale fire tests on a composite building", Struct Eng, 80(19), 30-38.
  17. Huang, Z., Burgess, I., Plank, R. and Bailey, C. (2004), "Comparison of BRE simple design method for composite slabs in fire with non-linear FE modelling", Fire Mater, 28, 127-138. https://doi.org/10.1002/fam.847
  18. Li, G.Q., Guo, S.X. and Zhou, H.S. (2007) "Modelling of membrane action in floor slabs subjected to fire", Eng Struct, 29, 880-887. https://doi.org/10.1016/j.engstruct.2006.06.025
  19. Moss, P.J., Clifton, G.C. (2004), "Modelling of the Cardington LBTF steel frame building fire tests", Fire Mater, 28, 177-198. https://doi.org/10.1002/fam.868
  20. SCI - Swinden Technology Centre (1999), 'The behaviour of Multi-storey steel framed buildings in fire - A European joint research programme", British Steel, Rotherham, U.K.
  21. Simoes da Silva, L., Santiago, A., Vila Real, P. and Moore, D. (2005), "Behaviour of steel joints under fire loading", Steel Compos Struct, 5(6), 485-513. https://doi.org/10.12989/scs.2005.5.6.485
  22. Vulcu, C., Gernay, Th., Zaharia, R. and Franssen, J.M. (2010), "Numerical modelling of membrane action of composite slabs in fire situation", Proceedings of 6th Intl Conference Structures in Fire, East Lansing, USA.
  23. Wald, F., Simoes da Silva, L., Moore, D., Lennon, T., Chladna, M., Santiago, A., Benes and M., Borges, L. (2005), "Experimental behaviour of steel structure under natural fire", New Steel Construction, 13(3), 24-27.
  24. Wald, F., Chladna, M., Moore, D., Santiago, A. and Lennon, T. (2006), "Temperature distribution in a fullscale steel framed building subjected to a antural fire", Steel Compos Struct, 6(2), 159-182. https://doi.org/10.12989/scs.2006.6.2.159
  25. Wald, F., Kallerova, P., Chlouba, P., Sokol, Z., Strejcek, M., Pospisil, J., Stroner, M., Kremen, T. and Smitka, V. (2010), "Fire test on an administrative building in Mokrsko", CTU in Prague.
  26. Wang, Y.C. (1996), "Tensile membrane action in slabs and its application to the Cardington tests", Second Cardington Conference, BRE, Watford, UK.
  27. Yin, Y.Z. and Wang, Y.C. (2006), "Analysis of behaviour of steel beams with web openings at elevated temperatures", Steel Compos Struct, 6(1), 22-32.
  28. Zhao, B., Roosefid, M. and Vassart, O. (2008), "Full scale test of a steel and concrete composite floor exposed to ISO fire", Proceedings of the 5th International Conference on Structures in Fire SiF'08, Singapore City, Singapore, May.