Direct Strength Method of Design for Channel Sections in Shear with Square and Circular Web Holes
Publication: Journal of Structural Engineering
Volume 143, Issue 6
Abstract
The direct strength method (DSM) design rules for cold-formed steel members in shear have been incorporated recently into the North American specification for the design of cold-formed steel structural members and are being implemented in the Australian cold-formed steel structures standard. The method, which was calibrated for unperforated members only, requires two inputs including the buckling load and the shear yielding load . For members with square web cutouts, can be computed by either the spline finite strip method or the tabulated values based on the shear buckling coefficients as in previous studies or the finite element method. However, has not been accurately formulated including holes. This paper represents a practical model to obtain for members with central openings subjected predominantly to shear. The model ranges from very small holes where traditional shear yielding predominates to large holes where Vierendeel action dominates. The model is verified with the DSM design formulas using the predominantly shear tests recently conducted at the University of Sydney and Queensland University of Technology with both square and circular web openings and for shear spans with aspect ratio of 1.0.
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Acknowledgments
Funding provided by the University of Sydney International Scholarship for the first author is appreciated.
References
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Published In
Journal of Structural Engineering
Volume 143 • Issue 6 • June 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jul 7, 2016
Accepted: Nov 30, 2016
Published ahead of print: Feb 1, 2017
Published online: Feb 2, 2017
Published in print: Jun 1, 2017
Discussion open until: Jul 2, 2017
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