Developments on the Design of Cold-Formed Steel Angles
Publication: Journal of Structural Engineering
Volume 139, Issue 5
Abstract
This paper presents procedures for the design of fixed- and pin-ended equal-leg angle columns with short-to-intermediate lengths. First, some remarks concerning the buckling and postbuckling behavior of the angle columns are presented that (1) illustrate the main differences between the fixed- and pin-ended column responses and (2) demonstrate the need for specific design procedures. Then, the paper reports an in-depth investigation aimed at gathering a large column ultimate strength data bank that includes (1) experimental values collected from the literature and (2) numerical values obtained from shell finite-element analyses carried out in the code ABAQUS. The set of experimental results is comprised of 41 fixed-ended columns and 37 pin-ended columns and the numerical results obtained include 89 fixed-ended columns and 28 pin-ended columns; various cross-section dimensions, lengths, and yield stresses are considered. Finally, the paper closes with the proposal of new design procedures for fixed- and pin-ended angle columns based on the direct strength method (DSM). The two procedures adopt modified global and local strength curves, and it is shown that the proposed DSM approach leads to accurate ultimate strength estimates for short-to-intermediate columns covering a wide slenderness range.
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Acknowledgments
The authors gratefully acknowledge Mr. Enio Mesacasa Jr., for the work carried out during his stay in Lisbon and also for sharing some of his recent research results; and the financial support of the Portuguese Foundation for Science and Technology (FCT), through the research project Generalised Beam Theory (GBT) - Development, Application and Dissemination (PTDC/ECM/108146/2008).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 5 • May 2013
Pages: 680 - 694
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 2, 2011
Accepted: Jun 5, 2012
Published online: Aug 10, 2012
Published in print: May 1, 2013
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