Nonlinear Analysis of Composite Beams with Partial Interaction in Steel Frame Structures at Elevated Temperature
Publication: Journal of Structural Engineering
Volume 136, Issue 8
Abstract
Flooring systems containing steel-concrete composite beams are common in steel frame structures and it is widely recognized that their behavior under fire loading is profoundly different to that of simply supported composite beams under fire loading. This difference in behavior is due to the presence of restraints provided by cooler members in a compartment fire in a composite frame structure and there is extensive evidence from fire tests that composite beams with unprotected steel components in steel frames perform much better than simply supported composite beams with unprotected steel components. In order to model the structural response of a composite beam restrained in this way at elevated temperature, recourse is needed to a geometric nonlinear formulation, since the transverse beam deflections are large and interact with the substantial axial compressive force in the member at the early stages of the fire. This paper presents such a formulation, which incorporates partial interaction between the concrete slab and steel component, as well as the degradation of the stiffnesses of the components of the composite beam prior to yield at elevated temperature. The generic technique that is developed is shown to agree with solutions reported elsewhere and provides a structural model for the response of a composite beam in fire with the potential for inclusion in prescriptive code rules for rational fire engineering based designs.
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Acknowledgments
The work in this paper was supported by the Australian Research Council through a Federation Fellowship awarded to the second writer.
References
Bailey, C. G. (2004). “Membrane action of slab-beam composite floor systems in fire.” Eng. Struct., 26, 1691–1703.
Bailey, C. G., and Moore, D. B. (2000). “The structural behaviour of steel frames with composite floor slabs subject to fire. Part I: Theory.” Struct. Eng., 78(11), 19–27.
Bradford, M. A. (2006a). “Elastic analysis of straight members at elevated temperature.” Adv. Struct. Eng., 9(5), 611–618.
Bradford, M. A. (2006b). “Generic model for a composite T-beam at elevated temperature.” 4th Int. Workshop on Structures in Fire, IAFSS, London.
Bradford, M. A., Filonov, A., Hogan, T. J., Uy, B., and Ranzi, G. (2006a). “Strength and ductility of shear connection in composite T-beams with trapezoidal metal sheeting.” 8th Int. Conf. on Steel, Space and Composite Structures, Kuala Lumpur, Malaysia, 15–26.
Bradford, M. A., Ranzi, G., and Ansourian, P. (2006b). “Composite beams in sub-frame assemblages with longitudinal and transverse partial interaction at elevated temperatures.” Int. Conf. on Metal Structures 2006, Timisoara, Romania, 354–360.
British Standards Institution. (2004). “Eurocode 4: Design of composite steel and concrete structures, part 1.1: General rules and rules for buildings.” BS EN 1994-1-1, London.
Drysdale, D. (1998). Introduction to fire dynamics, 2nd Ed., Wiley, London.
Elghazouli, A. Y., and Izzuddin, B. A. (2000). “Response of idealised composite beam-slab systems under fire conditions.” J. Constr. Steel Res., 56, 199–224.
Gattesco, N., and Giuriani, E. (1996). “Experimental study on stud shear connectors subjected to cyclic loading.” J. Constr. Steel Res., 38(1), 1–21.
Girhammar, U. A., and Pan, D. (1993). “Dynamic analysis of composite members with interlayer slip.” Int. J. Solids Struct., 30(6), 797–823.
Heidarpour, A., and Bradford, M. A. (2007). “Nonlinear analysis of composite beams with partial interaction in frame structures at elevated temperature.” UNICIV Rep., School of Civil and Environmental Engineering, The Univ. of New South Wales, Sydney, Australia.
Huang, Z., Burgess, I. W., and Plank, R. J. (1999). “The influence of shear connectors on the behaviour of composite steel-framed buildings in fire.” J. Constr. Steel Res., 51, 219–237.
Huang, Z., Burgess, I. W., and Plank, R. J. (2000). “Three-dimensional analysis of composite steel framed buildings in fire.” J. Struct. Eng., 126(3), 389–397.
Huang, Z., Burgess, I. W., and Plank, R. J. (2004). “Fire resistance of composite floors subject to compartment fires.” J. Constr. Steel Res., 60(2), 339–360.
Johnson, R. P. (1994). Composite structures of steel and concrete, Blackwell Scientific, Oxford, U.K.
Kruppa, J., and Zhao, B. (1995). “Fire resistance of composite beams to Eurocode 4 part 1.2.” J. Constr. Steel Res., 33(1–2), 51–69.
Lange, D., Usmani, A., Cameron, N., Winkler, W., and Torero, J. (2007). “A performance based design methodology for composite floor slabs in fire.” 4th Int. Workshop on Structures in Fire, IAFSS, London.
Li, A. N., and Cederwall, K. (1996). “Push-out tests on studs in high strength and normal strength concrete.” J. Constr. Steel Res., 36(1), 15–29.
Loh, H. Y., Uy, B., and Bradford, M. A. (2004a). “The effects of partial shear connection in the hogging moment regions of composite beams. Part I: Experimental study.” J. Constr. Steel Res., 60(6), 897–919.
Loh, H. Y., Uy, B., and Bradford, M. A. (2004b). “The effects of partial shear connection in the hogging moment regions of composite beams. Part II: Theoretical study.” J. Constr. Steel Res., 60(6), 921–962.
Martin, D. M., and Moore, D. B. (1997). “Introduction and background to the research programme and major fire tests at BRE Cardington.” National Steel Constructional Conf., London, 37–64.
Oehlers, D. J., and Bradford, M. A. (1995). Composite steel and concrete structural members: Fundamental behaviour, Pergamon, Oxford, U.K.
Oehlers, D. J., and Bradford, M. A. (1999). Elementary behaviour of composite steel and concrete structural members, Butterworth-Heinemann, Oxford, U.K.
Oehlers, D. J., Nguyen, N. T., Ahmed, M., and Bradford, M. A. (1997). “Partial interaction in composite steel and concrete beams with full shear connection.” J. Constr. Steel Res., 41(2–3), 235–248.
Ranzi, G., and Bradford, M. A. (2007a). “Direct stiffness analysis of a composite beam-column element with partial interaction.” Comput. Struct., 85(15–16), 1206–1214.
Ranzi, G., and Bradford, M. A. (2007b). “Composite beams with both longitudinal and transverse partial interaction subjected to elevated temperatures.” Eng. Struct., 29(10), 2737–2750.
Ranzi, G., Bradford, M. A., and Uy, B. (2004). “A direct stiffness analysis of a composite beam with partial interaction.” Int. J. Numer. Methods Eng., 61, 657–672.
Ranzi, G., Gara, F., Leoni, G., and Bradford, M. A. (2006). “Analysis of composite beams with partial interaction using available modeling techniques: A comparative study.” Comput. Struct., 84, 930–941.
Roberts, T. M. (1985). “Finite difference analysis of composite beams with partial interaction.” Comput. Struct., 21(3), 469–473.
Sanad, A. M., Rotter, J. M., Usmani, A. S., and O’Connor, M. A. (2000). “Composite beams in large buildings under fire: Numerical modeling and structural behaviour.” Fire Saf. J., 35, 165–188.
Seracino, R., Lee, C. T., Lim, T. C., and Lim, Y. J. (2004). “Partial interaction stresses in continuous composite beams under serviceability loads.” J. Constr. Steel Res., 60, 1525–1543.
Standards Australia. (1998). “Steel structures.” AS4100, Sydney, Australia.
Standards Australia. (2001). “Concrete structures.” AS3600, Sydney, Australia.
Usmani, A. S., Rotter, J. M., Lamont, S., Sanad, A. M., and Gille, M. (2001). “Fundamental principles of structural behaviour under thermal effects.” Fire Saf. J., 36, 721–744.
Wang, Y. C. (2002). Steel and composite structures: Behaviour and design for fire safety, E & FN Spon, London.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 8 • August 2010
Pages: 968 - 977
Copyright
© 2010 ASCE.
History
Received: Oct 7, 2009
Accepted: Jan 20, 2010
Published online: Jan 22, 2010
Published in print: Aug 2010
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