Failure of Lightly Reinforced Concrete Members under Fire. I: Analytical Modeling
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Volume 130, Issue 1
Abstract
This paper is concerned with the failure of lightly reinforced concrete members under fire conditions, with particular emphasis given to the catenary action arising from axial restraint at the supports and the ensuing rupture of the reinforcement. The relevance of this work stems from the need to make a fundamental step toward understanding the conditions that influence the failure of a steel-decked composite floor slab, which is shown to become effectively lightly reinforced at elevated temperature. A new analytical model is proposed for lightly reinforced members subject to axial restraint, which accounts for the compressive arch and tensile catenary stages, bond-slip, yielding, and rupture of the steel reinforcement as well as the effect of elevated temperature. The versatility of the proposed model and the conditions which govern its validity are illustrated in this paper through comparisons with detailed computations based on nonlinear finite element analysis. The companion paper utilizes the proposed analytical model to perform a parametric investigation into the factors influencing the failure of lightly reinforced members, and to highlight key implications for structural fire resistance design.
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References
Bailey, C. G., Lennon, T., and Moore, D. B.(1999). “The behaviour of full-scale steel framed buildings subjected to compartment fires.” Struct. Eng., 77(8), 15–21.
Bailey, C. G., and Moore, D. B.(2000a). “The structural behaviour of steel frames with composite floor slabs subject to fire. Part 1: Theory.” Struct. Eng., 78(11), 19–27.
Bailey, C. G., and Moore, D. B.(2000b). “The structural behaviour of steel frames with composite floor slabs subject to fire. Part 2: Design.” Struct. Eng., 78(11), 28–33.
Bosco, C., Carpinteri, A., and Debernardi, P. G.(1990). “Minimum reinforcement in high-strength concrete.” J. Struct. Eng., 116(2), 427–437.
Elghazouli, A. Y., and Izzuddin, B. A.(2000). “Response of idealised composite beam-slab systems under fire conditions.” J. Constr. Steel Res., 56(3), 199–224.
Elghazouli, A. Y., and Izzuddin, B. A.(2001). “Analytical assessment of the structural performance of composite floors subject to compartment fires.” Fire Safety J., 36, 769–793.
Elghazouli, A. Y., and Izzuddin, B. A.(2004). “Failure of lightly reinforced concrete members under fire. II: Parametric studies and design considerations.” J. Struct. Eng., 130(1), 18–31.
Gillie, M., Usmani, A. S., and Rotter, J. M.(2001). “A structural analysis of the first cardington test.” J. Constr. Steel Res., 57, 581–601.
Izzuddin, B. A. (1991). “Nonlinear dynamic analysis of framed structures.” PhD thesis, Dept. of Civil Engineering, Imperial College, Univ. of London, London.
Izzuddin, B. A., and Elghazouli, A. Y. (2003). “Maple worksheets for full and simplified models of failure of LRC members.” Internal Rep. No. 03-002-S4, Dept. of Civil and Environmental Engineering, Imperial College, London.
Izzuddin, B. A., Elghazouli, A. Y., and Tao, X. Y. (2002). “Realistic modelling of composite floor slabs under fire conditions.” Proc., 15th ASCE Engineering Mechanics Conf., Columbia University, New York.
Izzuddin, B. A., and Elnashai, A. S.(1993a). “Eulerian formulation for large displacement analysis of space frames.” J. Eng. Mech., 119(3), 549–69.
Izzuddin, B. A., and Elnashai, A. S.(1993b). “Adaptive space frame analysis. Part II: A distributed plasticity approach.” Struct. Build. J., Proc. Inst. Civ. Eng., London, England, 99(3), 317–26.
Izzuddin, B. A., and Lloyd Smith, D.(2000). “Efficient nonlinear analysis of elasto-plastic 3D R/C frames using adaptive techniques.” Comput. Struct., 78(4), 549–573.
Izzuddin, B. A., and Moore, D. B.(2002). “Lessons from a full-scale fire test.” Struct. Build. J., Proc. Inst. Civ. Eng., 152(4), 319–329.
Izzuddin, B. A., Song, L., Elnashai, A. S., and Dowling, P. J.(2000). “An integrated adaptive environment for fire and explosion analysis of steel frames. Part II: Verification and application.” J. Constr. Steel Res., 53(1), 87–111.
Karayannis, C. J., Izzuddin, B. A., and Elnashai, A. S.(1994). “Application of adaptive analysis to reinforced concrete frames.” J. Struct. Eng., 120(10), 2935–2957.
O’Connor, M. A., and Martin, D. M. (1998). “Behaviour of a multi-storey steel framed building subjected to fire attack.” J. Constr. Steel Res., 46(1–3), Paper 169 (CD-Rom).
Park, R., and Paulay, T. (1975), Reinforced concrete structures, Wiley, New York.
Song, L., Izzuddin, B. A., Elnashai, A. S., and Dowling, P. J.(2000). “An integrated adaptive environment for fire and explosion analysis of steel frames. Part I: Analytical models.” J. Constr. Steel Res., 53(1), 63–85.
Wang, Y. C., Lennon, T., and Moore, D. B.(1995). “The behaviour of steel frames subject to fire.” J. Constr. Steel Res., 35, 291–322.
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Published In
Journal of Structural Engineering
Volume 130 • Issue 1 • January 2004
Pages: 3 - 17
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jun 4, 2002
Accepted: Oct 21, 2002
Published online: Dec 15, 2003
Published in print: Jan 2004
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