Structural Engineering and Mechanics

  • 제7권2호
  • /
  • Pages.127-145
  • /
  • 1999
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

An approach for calculating the failure loads of unprotected concrete filled steel columns exposed to fire

  • Wang, Y.C. (Structural Design Division, Building Research Establishment) ;
  • Kodur, V.K.R. (National Fire Laboratory, Institute for Research in Construction, National Research Council of Canada)
  • 발행 : 1999.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper deals with the development of an approach for evaluating the squash load and rigidity of unprotected concrete filled steel columns at elevated temperatures. The current approach of evaluating these properties is reviewed. It is shown that with a non-uniform temperature distribution, over the composite cross-section, the calculations for the squash load and rigidity are tedious in the current method. A simplified approach is proposed to evaluate the temperature distribution, squash load, and rigidity of composite columns. This approach is based on the model in Eurocode 4 and can conveniently be used to calculate the resistance to axial compression of a concrete filled steel column for any fire resistance time. The accuracy of the proposed approach is assessed by comparing the predicted strengths against the results of fire tests on concrete filled circular and square steel columns. The applicability of the proposed approach to a design situation is illustrated through a numerical example.

키워드

참고문헌

  1. American Society for Testing and Materials (ASTM 1990), Standard methods of fire tests on building construction and materials, ASTM E119-88, Philadelphia, PA.
  2. Canadian Standards Association (CSA 1989), Limit State Design of Steel Structures - CAN/CSA-S16.1-M89, Canadian Standards Association, Toronto, Ontario.
  3. European Committee for Standardization (CEN 1992), Eurocode 4: Design of composite steel and composite structures, Part 1.1: General rules and rules for buildings, British Standards Institution.
  4. European Committee for Standardization (CEN 1993), Eurocode 3: Design of steel structures, Part 1.1: General rules and rules for buildings, British Standards Institution.
  5. European Committee for Standardization (CEN 1994), Eurocode 4: Design of composite steel and concrete structures, Part 1.2: Structural fire design, British Standards Institution.
  6. Klingsch, W. and Weurker, K. (1995), "New developments in fire resistance of hollow section structures", Symposium on Hollow Structural Sections in Buildings and Construction, American Society of Civil Engineering, New York, NY.
  7. Kodur, V.K.R. and Lie, T.T. (1996a), "Fire resistance of circular steel columns filled with fibrereinforced concrete", Journal of Structural Engineering, American Society of Civil Engineers, 122(7), 776-782. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:7(776)
  8. Kodur, V.K.R. and Lie, T.T. (1996b), "Evaluation of the fire resistance of rectangular steel columns filled with fibre-reinforced concrete" , Canadian Journal of Civil Engineering (in press).
  9. Lawson, R.M. and Newman, G.M. (1996), Structural fire design to EC3 & EC4, and comparison with BS 5950, Technical report, SCI Publication 159, The Steel Construction Institute, UK.
  10. Lie, T.T. (1980), "New facility to determine fire resistance of columns", Canadian Journal of Civil Engineering, 7(3), 551-558. https://doi.org/10.1139/l80-063
  11. Lie, T.T. and Chabot, M. (1990), "A method to predict the fire resistance of circular concrete filled hollow steel columns", Journal of Fire Protection Engineering, 2(4), 111-126. https://doi.org/10.1177/104239159000200402
  12. Lie, T.T. and Chabot, M. (1992), Experimental studies on the fire resistance of hollow steel columns filled with plain concrete, Internal report No. 611, Institute for Research in Construction, National Research Council of Canada, Ottawa.
  13. Lie, T.T., Chabot, M. and Irwin, R.J. (Lie et al. 1992), Fire resistance of circular hollow steel sections filled with bar-reinforced concrete, Internal report No. 636, Institute for Research in Construction, National Research Council of Canada, Ottawa.
  14. Lie, T.T. and Irwin, R.J. (1992), Fire resistance of rectangular hollow steel sections filled with bar reinforced concrete, Internal report No. 631, Institute for Research in Construction, National. Research Council of Canada, Ottawa.
  15. Lie, T.T. and Kodur, V.K.R. (1996), "Fire resistance of steel columns filled with bar-reinforced concrete", Journal of Structural Engineering, American Society of Civil Engineers, 122(1), 30-36.
  16. Underwriters' Laboratories (UL 1982), Standard methods of fire endurance tests of building construction and materials, CAN4-S101-M82, Underwriters' Laboratories of Canada, Scarborough, Ontario.
  17. Wang, Y.C. and Moore, D.B. (1995), "Steel frames in fire: analysis", Engineering Structures, 7(6), 462-472.
  18. Wickstrom, U. (1983), TASEF-A: A computer program for temperature analysis of structures exposed to fire, Lund Institute of Technology, Sweden.

피인용 문헌

  1. A simple method for calculating the fire resistance of concrete-filled CHS columns vol.54, pp.3, 2000, https://doi.org/10.1016/S0143-974X(99)00061-9
  2. FE analysis of fire resistance of concrete filled CHS columns vol.59, pp.6, 2003, https://doi.org/10.1016/S0143-974X(02)00059-7
  3. A unified method for calculating fire resistance of solid and hollow concrete-filled steel tube columns based on average temperature vol.71, 2014, https://doi.org/10.1016/j.engstruct.2014.03.038
  4. Simple design procedure for concrete filled steel tubular columns in fire vol.155, 2018, https://doi.org/10.1016/j.engstruct.2017.10.062
  5. Study of recycled concrete–filled steel tubular columns on the compressive capacity and fire resistance vol.9, pp.6, 2017, https://doi.org/10.1177/1687814017705064
  6. Efficiency of insulation layers in fire protection of FRP-confined RC columns-numerical study vol.77, pp.5, 1999, https://doi.org/10.12989/sem.2021.77.5.673