Stiffness Reduction of Cold-Formed Steel Structures Subject to Sectional Buckling and Yielding
Publication: Journal of Structural Engineering
Volume 149, Issue 11
Abstract
The paper develops a stiffness reduction factor to be used in geometric nonlinear beam-element type elastic analysis of cold-formed steel structures. The factor accounts for the reduction in flexural and warping torsion rigidities resulting from local and distortional buckling as well as residual stresses, particular to cold-formed steel structures. The purpose of applying the factor is to accurately account for the geometric second order effects when predicting the internal distributions of moments of cold-formed steel structural frames. The stiffness reduction factor arising from local and distortional buckling is first determined followed by the stiffness reduction factor caused by residual stresses. Subsequently, the two effects are combined in a single expression, which is a format suitable for incorporation in the North American specification for cold-formed steel structures, AISI-S100.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This project was undertaken as a part of Australian Research Council (ARC) Discovery Project DP220103573. The constructive comments offered by Prof Gregory Hancock are gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 149 • Issue 11 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Apr 4, 2023
Accepted: Jul 3, 2023
Published online: Sep 5, 2023
Published in print: Nov 1, 2023
Discussion open until: Feb 5, 2024
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