Numerical Modeling of LiteSteel Beams Subject to Shear
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
A LiteSteel beam (LSB) is a new cold-formed steel hollow flange channel beam produced by using a patented manufacturing process involving simultaneous cold-forming and dual electric resistance welding. It has the beneficial characteristics of torsionally rigid closed rectangular flanges combined with the economical fabrication processes from a single strip of high-strength steel. Although the LSB sections are commonly used as flexural members, no research has been conducted on the shear behavior of LSBs. Therefore, experimental and numerical studies were conducted to investigate the shear behavior and strength of LSBs. In this research, finite-element models of LSBs were developed to investigate their nonlinear shear behavior, including their buckling characteristics and ultimate shear strength. They were validated by comparing their results with available experimental results. The models provided full details of the shear buckling and strength characteristics of LSBs and showed the presence of considerable improvements to web shear buckling in LSBs and associated postbuckling strength. This paper presents the details of the finite-element models of LSBs and the results. Both the finite-element analysis (FEA) and experimental results showed that the current design rules in cold-formed steel codes are very conservative for the shear design of LSBs. The ultimate shear capacities from FEAs confirmed the accuracy of proposed shear strength equations for LSBs on the basis of the North American specification and direct strength method (DSM) design equations. Developed finite-element models were used to investigate the reduction to shear capacity of LSBs when full-height web side plates were not used or when only one web side plate was used, and these results are also presented in this paper.
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Acknowledgments
The writers would like to thank Australian Research Council and OneSteel Australian Tube Mills for their financial support and the Queensland University of Technology for providing the necessary facilities and support to conduct this research project. They would also like to thank Mr. Ross Dempsey, Manager of Research and Testing, OneSteel Australian Tube Mills, for his technical contributions and his overall support to the many different phases of this research project.
References
ABAQUS Version 6.7 [Computer software]. ABAQUS, Inc. Pawtucket, RI.
American Iron and Steel Institute (AISI). (2006). Specification for the design of cold-formed steel structural members, Washington, DC.
American Iron and Steel Institute (AISI). (2007). North American specification for the design of cold-formed steel structural members, Washington, DC.
Gao, T., and Moen, C. D. (2010). “The cold work of forming effect in steel structural members." Proc., Int. Colloquium on Stability and Ductility of Steel Structures, Univ. of Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Hancock, G. J. (2005). Design of cold-formed steel structures, 3rd Ed., Australian Institute of Steel Construction, Sydney, Australia.
Jeyaragan, S., and Mahendran, M. (2009). “Experimental studies of the flexural behaviour of back to back LiteSteel beams.” Research Rep., Queensland Univ. of Technology, Brisbane, Australia.
Keerthan, P., and Mahendran, M. (2010a). “Experimental studies on the shear behaviour of LiteSteel beams.” Eng. Struct., 32(10), 3235–3247.
Keerthan, P., and Mahendran, M. (2010b), “Elastic shear buckling characteristics of LiteSteel beams.” J. Constr. Steel Res., 66(11), 1309–1319.
LaBoube, R. A., and Yu, W. W. (1978). “Cold-formed steel beam webs subjected primarily to shear.” Research Rep., American Iron and Steel Institute, Univ. of Missouri-Rolla, Rolla, MO.
Lee, S. C., Chai, H., and Yoo, C. (1998). “Strength of plate girders web panels under pure shear.” J. Struct. Eng., 124(2), 184–194.
Lee, S. C., Davidson, J. S., and Yoo, C. (1996). “Shear buckling coefficients of plate girder web panels.” J. Comput. Struct., 59(3), 789–795.
Mahaarachchi, D., and Mahendran, M. (2005). “Moment capacity and design of LiteSteel beam sections.” Research Rep., Queensland Univ. of Technology, Brisbane, Australia.
Moen, C. D., Igusa, T., and Schafer, B. W. (2008). “Prediction of residual stresses and strains in cold-formed steel members.” Thin-Walled Struct., 46(11), 1274–1289.
MSC Patran Version 2008 [Computer software]. MSC Software Corporation, Santa Ana, CA.
OneSteel Australian Tube Mills (OATM). (2008). Design manual of LiteSteel Beam, Brisbane, Australia.
Porter, D. M., Rockey, K. C., and Evans, H. R. (1975). “The collapse behaviour of plate girders loaded in shear.” J. Struct. Eng., 53, 313–325.
Schafer, B. W. (2008). “The direct strength method of cold-formed steel member design.” J. Constr. Steel Res., 64(7-8), 766–778.
Seo, J. K., Anapayan, T., and Mahendran, M. (2008). “Imperfection characteristic of mono-symmetric LiteSteel beams for numerical studies.” Proc., 5th Int. Conf. on Thin-Walled Structures, Queensland Univ. of Technology, Brisbane, Australia, 451–460.
Suter, G. T., and Humar, J. L. (1986). “Post-buckling shear strength of a cold-formed steel joist.” Proc., 5th Int. Specialty Conf. on Cold-Formed Steel Structures, Univ. of Missouri-Rolla, St. Louis, 225–237.
Standards Australia/Standards New Zealand (SA). (2005). “Cold-formed steel structures.” Australian/New Zealand Standard AS/NZS4600, Sydney, Australia.
Yoo, C. H., and Lee, S. C. (2006). “Post-buckling mechanism of web panels under shear.” J. Struct. Eng., 132(10), 1580–1589.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 12 • December 2011
Pages: 1428 - 1439
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Apr 8, 2010
Accepted: Feb 10, 2011
Published online: Feb 12, 2011
Published in print: Dec 1, 2011
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