Buckling, Postbuckling, Strength, and DSM Design of Cold-Formed Steel Continuous Lipped Channel Beams
Publication: Journal of Structural Engineering
Volume 139, Issue 5
Abstract
The work reported in this paper is part of an ongoing numerical investigation aimed at (1) assessing the buckling, postbuckling, strength, and collapse behavior of cold-formed steel continuous beams and simple frames and (2) developing an efficient methodology, based on the direct strength method (DSM) approach, to design such structural systems. The results available at this stage concern two- and three-span lipped channel beams subjected to nonuniform bending, and they include the assessment of how accurately the beam ultimate strengths can be predicted by the current DSM design curves. The numerical results presented and discussed are obtained through analyses based on generalized beam theory (elastic buckling analyses) and shell finite-element models (all the remaining analyses). Ultimate strength values yielded by geometrically and materially nonlinear shell finite-element analyses are compared with estimates provided by the DSM equations, and on the basis of this comparison, it is possible to identify some features that must be included in a DSM approach applicable to continuous cold-formed steel beams.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Financial support was provided by Fundação para a Ciência e Tecnologia (Portugal) Project No. PTDC/ECM/108146/2008. C. Basaglia also acknowledges the Fundação para a Ciência e Tecnologia (Portugal) for Postdoctoral Scholarship SFRH/BPD/62904/2009.
References
American Iron and Steel Institute (AISI). (2007). “North American specification for the design of cold-formed steel structural members.” NAS: AISI-S100-07, Washington, DC.
ANSYS 12 [Computer software]. Canonsburg, PA, Ansys Inc.
Camotim, D., Silvestre, N., Basaglia, C., and Bebiano, R. (2008). “GBT-based buckling analysis of thin-walled members with non-standard support conditions.” Thin-Walled Struct., 46(7–9), 800–815.
Dinis, P. B., Camotim, D., and Silvestre, N. (2006). “GBT formulation to analyse the buckling behaviour of thin-walled members with arbitrarily ‘branched’ open cross-sections.” Thin-Walled Struct., 44(1), 20–38.
Dubina, D., and Ungureanu, V. (2010). “Behaviour of multi-span cold-formed Z-purlins with bolted lapped connections.” Thin-Walled Struct., 48(10–11), 866–871.
Hancock, G. J., Kwon, Y. B., and Bernard, E. S. (1994). “Strength design curves for thin-walled sections undergoing distortional buckling.” J. Constr. Steel Res., 31(2–3), 169–186.
Kwon, Y. B., Kim, B. S., and Hancock, G. J. (2009). “Compression tests of high strength cold-formed steel channels with buckling interaction.” J. Constr. Steel Res., 65(2), 278–289.
Pham, C. H., and Hancock, G. J. (2009). “Direct strength design of cold-formed purlins.” J. Struct. Eng., 135(3), 229–238.
Schafer, B. W. (2006). “CUFSM: elastic buckling analysis of thin-walled members by the finite strip method.” Version 3.12, 〈http://www.ce.jhu.edu/bschafer/cufsm〉 (Aug. 19, 2011).
Schafer, B. W. (2008). “Review: The direct strength method of cold-formed steel member design.” J. Constr. Steel Res., 64(7–8), 766–778.
Schafer, B. W., and Ádány, S. (2006). “Buckling analysis of cold-formed steel members using CUFSM: Conventional and constrained finite strip methods.” Proc., 18th Int. Specialty Conf. on Cold-Formed Steel Structures, R. LaBoube and W. W. Yu, eds., Missouri Univ. of Science and Technology, Rolla, MO, 39–54.
Schafer, B. W., and Peköz, T. (1998). “Direct strength prediction of cold-formed steel members using numerical elastic buckling solutions.” Proc., 14th Int. Specialty Conf. on Cold-Formed Steel Structures, R. LaBoube and W. W. Yu, eds., Missouri Univ. of Science and Technology, Rolla, MO, 69–76.
Shifferaw, Y., and Schafer, B. W. (2007). “Inelastic bending capacity in cold-formed steel members.” Proc., SSRC Annual Stability Conf., Missouri Univ. of Science and Technology, Rolla, MO, 279-299.
Silvestre, N., Camotim, D., and Dinis, P. B. (2009). “Direct strength prediction of lipped channel columns experiencing local-plate/distortional interaction.” Adv. Steel Construct., 5(1), 45–67.
Silvestre, N., Camotim, D., and Dinis, P. B. (2012). “Post-buckling behaviour and direct strength design of lipped channel columns experiencing local/distortional interaction.” J. Constr. Steel Res., 73, 12–30.
Standards of Australia. (2005). “Cold-formed steel structures.” AS/NZS4600, Sydney, Australia.
Yu, C., and Schafer, B. W. (2007). “Simulation of cold-formed steel beams in local and distortional buckling with applications to the direct strength method.” J. Constr. Steel Res., 63(5), 581–590.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 5 • May 2013
Pages: 657 - 668
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 25, 2011
Accepted: May 16, 2012
Published online: May 18, 2012
Published in print: May 1, 2013
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.