Numerical Modeling and Design of Lipped Channel Beams Subject to Web Crippling under One-Flange Load Cases
Publication: Journal of Structural Engineering
Volume 145, Issue 10
Abstract
Web crippling failure governs the behavior of thin cold-formed steel lipped channel beams (LCBs) used in floor systems. This paper describes a numerical modeling–based research study undertaken to investigate the web crippling behavior of LCBs under one-flange load cases and to develop improved design equations for possible inclusion in the cold-formed steel design standards. Finite-element models were developed to simulate the web crippling behavior of LCBs and their accuracy was verified using 36 web crippling tests of LCBs conducted under one-flange load cases using the new standard test method. A detailed numerical parametric study was then undertaken to investigate the web crippling behavior of LCBs using the verified finite element models of LCBs. This numerical parametric study provided an extensive web crippling capacity database and improved the understanding of the effects of key web crippling parameters such as inside bent radius, bearing length, and yield stress on the web crippling capacity. Using these results, new and improved web crippling design equations were proposed in this paper for LCBs under one-flange load cases. They include both unified web crippling equations and the direct strength method–based equations. This paper demonstrated the improved accuracy of the proposed equations and their potential for inclusion in the cold-formed steel design standards.
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Acknowledgments
The authors acknowledge the financial support of the Australian Research Council (LP120200650). They also acknowledge Queensland University of Technology’s support with the necessary research facilities and technical support.
References
AISI (American Iron and Steel Institute). 2008. Standard test method for determining the web crippling strength of cold-formed steel beams. AISI S909. Washington DC: AISI.
AISI (American Iron and Steel Institute). 2012. Specifications for the cold-formed steel structural members, cold-formed steel design manual. AISI S100. Washington, DC: AISI.
Duarte, A. P. C., and N. M. Silvestre. 2014. “A new slenderness-based approach for the web crippling design of plain channel steel beams.” Int. J. Steel Struct. 13 (3): 421–434. https://doi.org/10.1007/s13296-013-3003-4.
Kaitila, O. 2004. “Web crippling of cold-formed thin-walled steel cassettes.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Laboratory of Steel Structures, Helsinki Univ. of Technology.
Keerthan, P., and M. Mahendran. 2015. “Experimental investigation and design of lipped channel beams in shear.” Thin Walled Struct. 86: 174–184. https://doi.org/10.1016/j.tws.2014.08.024.
Keerthan, P., M. Mahendran, and E. Steau. 2014a. “Experimental study of web crippling behaviour of hollow flange channel beams under two flange load cases.” Thin Walled Struct. 85: 207–219. https://doi.org/10.1016/j.tws.2014.08.011.
Keerthan, P., M. Mahendran, and E. Steau. 2014b. “Web crippling tests of hollow flange channel beams: ETF and ITF load cases.” In Proc., Australasian Structural Engineering Conf. (ASEC 2014). Barton, Australia: Engineers Australia.
Natário, P., N. Silvestre, and D. Camotim. 2014c. “Computational modelling of flange crushing in cold-formed steel sections.” Thin Walled Struct. 84: 393–405. https://doi.org/10.1016/j.tws.2014.07.006.
Natário, P., N. Silvestre, and D. Camotim. 2014d. “Web crippling failure using quasi-static FE models.” Thin Walled Struct. 84: 34–49. https://doi.org/10.1016/j.tws.2014.05.003.
Natário, P., N. Silvestre, and D. Camotim. 2016. “Direct strength prediction of web crippling failure of beams under ETF loading.” Thin Walled Struct. 98: 360–374. https://doi.org/10.1016/j.tws.2015.09.012.
Natário, P., N. Silvestre, and D. Camotim. 2017. “Web crippling of beams under ITF loading: A novel DSM-based design approach.” J. Constr. Steel Res. 128: 812–824. https://doi.org/10.1016/j.jcsr.2016.10.011.
Prabakaran, K., and R. M. Schuster. 1998. “Web crippling of cold-formed steel sections.” In Proc., 14th Int. Speciality Conf. on Cold-formed Steel Structures. St. Louis.
SA/NZS (Standards Australia/Standards New Zealand). 2005. Australia/New Zealand Standard AS/NZS 4600 Cold-formed steel structures. Sydney, Australia: SA.
Schafer, B. W. 2008. “Review: The direct strength method of cold-formed steel member design.” J. Constr. Steel Res. 64 (7–8): 766–778. https://doi.org/10.1016/j.jcsr.2008.01.022.
Sundararajah, L. 2016. “Web crippling studies of cold-formed steel channel beams-experiments, numerical analyses and design rules.” Ph.D. thesis, School of Civil Engineering and Built Environment, Queensland Univ. of Technology.
Sundararajah, L., M. Mahendran, and P. Keerthan. 2017. “New design rules for lipped channel beams subject to web crippling under two-flange load cases.” Thin Walled Struct. 119: 421–437. https://doi.org/10.1016/j.tws.2017.06.003.
Zhao, X. L., and G. J. Hancock. 1995. “Square and rectangular hollow sections under transverse end bearing force.” J. Struct. Eng. 121 (9): 1323–1329. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:9(1323).
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©2019 American Society of Civil Engineers.
History
Received: Nov 8, 2017
Accepted: Jan 7, 2019
Published online: Jul 16, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 16, 2019
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