Limit Load Carrying Capacity of Two-Way Slabs with Two Edges Clamped and Two Edges Simply Supported in Fire
Publication: Journal of Structural Engineering
Volume 137, Issue 10
Abstract
This paper presents test results of temperature distribution, central vertical deflection, and edge horizontal deflection of a two-way concrete slab with two edges clamped and two edges simply supported in fire. On the basis of experimental results, a segment equilibrium method was presented to calculate the limit load-carrying capacity of concrete slabs in fire conditions. The model considered the tensile membrane action contributing to the vertical component of reinforcement tensile forces after the formation of mechanism of the plastic hinge line. The model could clearly predict the effect of the restraint end moment on the plastic hinge line pattern. Comparison between the developed model and test results showed good correlation.
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Acknowledgments
This project was supported by the NSFC with Grant No. NSFC50878069, the China MOST with Grant Nos. UNSPECIFIED2006BAJ13B03 and UNSPECIFIEDHZ2008-KF03, and the author (Y. L. Dong) deeply appreciated their support.
References
Bailey, C. G. (2001). “Membrane action of unrestrained lightly reinforced concrete slabs at large displacement.” Eng. Struct., 23(5), 470–483.
Bailey, C. G., Lennon, T., and Moore, D. B. (1999). “The behaviour of full-scale steel framed buildings subjected to compartment fires.” Struct. Eng. Part A, 77(8), 15–21.
Bailey, C. G., and Moore, D. B. (2000a). “The structural behavior of steel frames with composite floors slabs subject to fire—Part 1: Theory.” Struct. Eng. Part A, 78(11), 19–27.
Bailey, C. G., and Toh, W. S. (2007a). “Behaviour of concrete floor slabs at ambient and elevated temperatures.” Fire Saf. J., 42(6-7), 425–436.
Bailey, C. G., and Toh, W. S. (2007b). “Small-scale concrete slab tests at ambient and elevated temperatures.” Eng. Struct., 29(10), 2775–2791.
Bailey, C. G., White, D. S., and Moore, D. B. (2000b). “The tensile membrane action of unrestrained composite slabs simulated under fire conditions.” Eng. Struct., 22(12), 1583–1595.
Cameron, N. J. K., and Usmani, A. S. (2005). “New design method to determine the membrane capacity of laterally restrained composite floor slabs in fire. Part 1: Theory and method.” Struct. Eng. Part A, 83(19), 8–33.
Dong, Y. L. (2010). “Determination of tensile membrane effects by segment equilibrium.” Mag. Concr. Res., 62(1), 17–23.
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.
European Committee for Standardization (CEN). (1999). “Design of concrete structures, part 1-2: General rules—Structural fire design.” ENV 1992-1-2, Eurocode 2, Brussels.
Foster, S. J., Bailey, C. G., Burgess, I. W., and Plank, R. J. (2004). “Experimental behavior of concrete floor slabs at large displacements.” Eng. Struct., 26(9), 1231–1247.
ISO. (1975). “Fire resistance tests. Elements of building construction.” ISO 834, Geneva.
Izzuddin, B. A., and Elghazouli, A. Y. (2004). “Failure of lightly reinforced concrete members under fire. I: Analytical modeling.” J. Struct. Eng., 130(1), 3–17.
Lim, L. (2003). “Membrane action in fire exposed concrete floor systems.” Ph.D. dissertation, Univ. of Canterbury, Christchurch, New Zealand.
O’Conner, M. A., Kirby, B. R., and Martin, D. M. (2003). “Behavior of a multi-storey composite steel framed building in fire.” Struct. Eng. Part A, 81(2), 27–36.
Standard Methods for Testing of Concrete Structures of China. (1992). GB50152-92, Beijing.
Usmani, A. S., and Cameron, N. J. K. (2004). “Limit capacity of laterally restrained reinforced concrete floor slabs in fire.” Cem. Concr. Compos., 26(2), 127–140.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 10 • October 2011
Pages: 1182 - 1192
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 24, 2009
Accepted: Dec 15, 2010
Published online: Dec 17, 2010
Published in print: Oct 1, 2011
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