Simplified Lateral-Torsional Buckling Analysis in Special Truss-Reinforced Composite Steel-Concrete Beams
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
The paper addresses the lateral-torsional buckling for a special steel truss structure which is adopted to reinforce a particular class of composite steel-concrete beams. The investigated instability phenomenon deals with a transitory ultimate limit state that may occur when the truss structure is being assembled and is bearing the precast floor system, before the concrete has hardened. During this transitory stage the truss beam works as a steel structure and may exhibit local or global instability phenomena. It provides the reinforcement of the final composite steel-concrete beam once the concrete has hardened. The main result of this paper is an analytical approach for the estimation of the elastic critical moment which is required to calculate the final design lateral-torsional buckling resistance moment in accordance with the technical code in force (the European standard for steel structures is considered in this paper). The simplified analysis this paper presents leads to a closed-form solution for the elastic critical moment, thus providing a simple and rapid tool for the calculation of the lateral-torsional buckling resistance moment. A comparison to a finite element analysis has been performed to demonstrate the correctness of the proposed analytical formulation.
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Acknowledgments
This work is partially supported by Regione Puglia PO 2007-2013—Asse I-Linea 1.1-Azione 1.1.2-“Aiuti agli investimenti in Ricerca per le PMI”-Progetto UNSPECIFIEDI8KBEB2 “Nuovo sistema costruttivo (MTR) in elementi reticolari misti di acciaio e calcestruzzo per l’ingegneria strutturale”-Metal.Ri snc.
References
Allen, H. G., and Bulson, P. S. (1980). Background to buckling, McGraw-Hill, London.
Clark, J. W., and Hill, H. N. (1960). “Lateral buckling of beams.” J. Struct. Div., 86(ST7), 175–196.
Eurocode 3. (2005). “Design of steel structures. Part 1-1: General rules and rules for buildings.” European committee for standardization, Brussels.
Kitipornchai, S., and Dux, P. F. (1987). “Buckling and bracing of elastic beams and cantilevers.” Civil engineering practice, structures, Vol. 1, P. N. Cheremisinoff, N. P. Ceremisinoff, and S. L. Cheng, eds., Technomic, Lancaster, PA, 501–520.
Kitipornchai, S., Wang, C. M., and Trahair, N. S. (1986). “Buckling of monosymmetric I-beams under moment gradient.” J. Struct. Eng., 112(4), 781–799.
Linder, J. (1997). “Design of steel beams and beam column.” Eng. Struct., 19(5), 378–384.
Pandey, M. D., and Sherbourne, A. N. (1990). “Elastic lateral-torsional stability of beams: General considerations.” J. Struct. Eng., 116(2), 317–335.
Roberts, T. M., and Azizian, Z. G. (1984). “Instability of monosymmetric I-beams.” J. Struct. Eng., 110(6), 1415–1419.
Sapkás, Á., and Kollár, L. P. (2002). “Lateral-torsional buckling of composite beams.” Int. J. Solids Struct., 39(11), 2939–2963.
Timoshenko, S. P., and Gere, J. M. (1961). Theory of elastic stability, McGraw-Hill, New York.
Trahair, N. S. (1977). The behavior and design of steel structures, Chapman and Hall, London.
Trahair, N. S. (2009). “Buckling analysis design of steel frames.” J. Constr. Steel Res., 65(7), 1459–1463.
Wang, C. M., and Kitipornchai, S. (1986). “Buckling capacities of monosymmetric I-beams.” J. Struct. Eng., 112(11), 2373–2391.
Wang, C. M., Wang, C. Y., and Reddy, J. N. (2005). “Exact solutions for buckling of structural members.” CRC Series in computational mechanics and applied analysis, J. N. Reddy, ed., CRC LLC, Boca Raton, FL.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 12 • December 2011
Pages: 1419 - 1427
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 25, 2010
Accepted: Feb 10, 2011
Published online: Feb 12, 2011
Published in print: Dec 1, 2011
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