- Author
- Alfawakhiri, F. | Kodur, V. K. R. | Frater, G.
- Title
- Temperature Field Modeling of the First Cardington Test.
- Coporate
- National Research Council of Canada, Ottawa, Ontario
- Report
- NRCC-46899,
- Book or Conf
- Structures in Fire, 3rd International Workshop. Proceedings. May 10-11, 2004, Ontario, Canada, 1-11 p., 2004
- Keywords
- temperature field | heat transfer | fire resistance | beams | thermal properties | fire tests | steels | concretes
- Identifiers
- SAFIR (Smoke Gas Analysis by Fourier Transform Infrared Spectorscopy)
- Abstract
- Results of heat transfer numerical simulations, using SAFIR program, for the composite floor beam of the first Cardington fire test in the eight-story steel-framed building are presented. For steel beam temperature predictions, the 2D mesh model was simplified by neglecting the presence of the steel deck and averaging the concrete slab thickness. This model was sufficient to yield a satisfactory match of predicted and measured temperatures in the steel beam. The predictions show that the unprotected bottom flange and web temperatures follow closely the temperature of the fire gas environment. For temperature predictions in the ribbed concrete slab, a more detailed 2D model was generated with certain nodes to match the experimental measurement locations. Large number of SAFIR simulations was conducted to investigate the sensitivity of the output to various heat transfer parameters. The results confirm to the trends observed in earlier studies that used different software. The numerical predictions were compared with the experimental data, and the predicted temperatures in the concrete always exceeded temperatures measured in the test. Possible reasons for this over-conservativeness of predictions are briefly discussed.