Session Dates
09 Nov 2016
Abstract
The Direct Strength Method (DSM) design rules for cold-formed steel members in shear have been incorporated recently into the North American Specification (AISI S100-12) and are being implemented in the Australian standard (AS/NZS 4600:2005). The method, which was calibrated for unperforated members only, requires two inputs including the buckling load Vcr and the shear yielding load Vy. For members with square web cut-outs, Vcr can be computed by either the Spline Finite Strip Method (SFSM) or the tabulated values based on the shear buckling coefficients kv as studied by CH Pham or the Finite Element Method (FEM). However, Vy has not been accurately formulated including holes.
This paper represents a practical model to obtain Vy for members with central openings subjected to predominantly 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 formulae 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 ratios of 1.0.
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
Wei-Wen Yu Center for Cold-Formed Steel Structures
Meeting Name
International Specialty Conference on Cold-Formed Steel Structures 2016
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2016 Missouri University of Science and Technology, All rights reserved.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Pham, Song Hong; Pham, Cao Hung; and Hancock, Gregory J., "A Direct Strength Method (DSM) of Design for Channel Sections in Shear with Square and Circular Web Holes" (2016). CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018). 5.
https://scholarsmine.mst.edu/isccss/23iccfss/session4/5
A Direct Strength Method (DSM) of Design for Channel Sections in Shear with Square and Circular Web Holes
The Direct Strength Method (DSM) design rules for cold-formed steel members in shear have been incorporated recently into the North American Specification (AISI S100-12) and are being implemented in the Australian standard (AS/NZS 4600:2005). The method, which was calibrated for unperforated members only, requires two inputs including the buckling load Vcr and the shear yielding load Vy. For members with square web cut-outs, Vcr can be computed by either the Spline Finite Strip Method (SFSM) or the tabulated values based on the shear buckling coefficients kv as studied by CH Pham or the Finite Element Method (FEM). However, Vy has not been accurately formulated including holes.
This paper represents a practical model to obtain Vy for members with central openings subjected to predominantly 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 formulae 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 ratios of 1.0.
