Numerical simulation of the fire resistance of composite slabs with steel deck

  • Authors

    • Paulo A. G. Piloto
    • Lucas M.S. Prates
    • Carlos Balsa
    • Ronaldo Rigobello
    2018-04-20
    https://doi.org/10.14419/ijet.v7i2.23.11889
  • Composite slabs, Fire resistance, Numerical simulation, Simple calculation method.

  • This investigation is related with the fire resistance of composite slabs with steel deck. This composite solution consists of a concrete topping cast on the top of a steel deck. The concrete is typically reinforced with a steel mesh and may also contain individual rebars. The deck also acts as reinforcement and may be exposed to accidental fire conditions from the bottom. This composite solution is widely used in every type of buildings and requires fire resistance, in accordance to regulations. The fire resistance is specified by the loadbearing capacity (R), insulation (I) and integrity (E). The fire rating for (R) and (E) is not in the scope of this investigation. The fire rating for insulation (I) is evaluated by two different methods (numerical simulation and simple calculation). The fire rating is calculated for 32 different geometric configuration, in order to evaluate the effect of the thickness of the concrete layer and the thickness of steel deck. The fire resistance (I) increases with the thickness of the concrete when using both methods, but the simple calculation method seems to be unsafe for all the cases, requiring a revision for the formulae presented in Annex D of EN1994-1-2. A new proposal is presented.

     

     

  • References

    1. [1] Hamerlinck, A. F. The behaviour of fire-exposed composite steel/concrete slabs Eindhoven: Technische Universiteit Eindhoven DOI: 10.6100/IR348360, (1991). pp: 179.

      [2] Hamerlinck, Ralph; Twilt, Leen; and Stark, Jan W. B., "A Numerical Model for Fire-exposed Composite Steel/concrete Slabs".10th International Specialty Conference on Cold-Formed Steel Structures, St. Louis, Missouri, U.S.A., October 23-24. (1990), pp. 115-130.

      [3] Bailey, Colin & Lennon, Tom & Moore, D.B. “The behaviour of full-scale steel-framed building subjected to compartment firesâ€. Structural Engineer. 77. (1999), pp. 15-21.

      [4] S Lamont, A.S Usmani, D.D Drysdale, “Heat transfer analysis of the composite slab in the Cardington frame fire testsâ€, Fire Safety Journal, Volume 36, Issue 8, ISSN 0379-7112, https://doi.org/10.1016/S0379-7112(01)00041-8, (2001), pp. 815-839.

      [5] Guo-Qiang Li, Nasi Zhang, Jian Jiang, “Experimental investigation on thermal and mechanical behaviour of composite floors exposed to standard fireâ€, Fire Safety Journal, Volume 89, ISSN 0379-7112, https://doi.org/10.1016/j.firesaf.2017.02.009, (2017), pp. 63-76.

      [6] ISO. ISO 834-1. Fire-resistance tests - Elements of building construction – Part 1: general requirements, Switzerland: Technical Committee ISO/TC 92, (1999). pp: 25.

      [7] CEN. EN 1363-1: Fire resistance tests - Part 1: General Requirements. Brussels: CEN - European committee for standardization, (2012) pp. 52.

      [8] CEN. EN 1365-2: Fire resistance tests for loadbearing elements - Part 2: Floors and roofs. Brussels: CEN - European committee for standardization, (2014) pp. 34.

      [9] ECCS. Calculation of the fire resistance of composite concrete slabs with profiled steel sheet exposed to the standard fire. ECCS, Committee T3-Fire safety of steel structures, technical note, Publication 32, (1983). pp: 48.

      [10] CEN. EN 1994-1-2 - Eurocode 4: Design of Composite Steel and Concrete Structures - Part 1–2: General Rules—Structural Fire Design. Brussels: CEN - European committee for standardization (2005), pp. 109.

      [11] CEN. EN 1991-1-2 - Eurocode 1: Actions on structures - Part 1-2: General actions - Actions on structures exposed to fire (pp. 59). Brussels: CEN - European Committee for Standardization (2002), pp: 59.

      [12] CEN. EN 1993-1-2 - Eurocode 3: Design of steel structures - Part 1-2: General rules - Structural fire design. Brussels: CEN - European Committee for Standardization (2005), pp. 78.

      [13] CEN. EN 1992-1-2 - Eurocode 2: Design of concrete structures - Part 1-2: General rules - Structural fire design. Brussels: CEN - European Committee for Standardization (2004), pp. 97.

      [14] Linus Lim, Andrew Buchanan, Peter Moss, Jean-Marc Franssen, “Numerical modelling of two-way reinforced concrete slabs in fireâ€, Engineering Structures, Volume 26, Issue 8, , ISSN 0141-0296, https://doi.org/10.1016/j.engstruct.2004.03.009, (2004), pp. 1081-1091.

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  • How to Cite

    A. G. Piloto, P., M.S. Prates, L., Balsa, C., & Rigobello, R. (2018). Numerical simulation of the fire resistance of composite slabs with steel deck. International Journal of Engineering & Technology, 7(2.23), 83-86. https://doi.org/10.14419/ijet.v7i2.23.11889