Highly Ductile Limits for Deep Steel Columns
Publication: Journal of Structural Engineering
Volume 144, Issue 4
Abstract
The collapse behavior of individual deep columns subjected to realistic loading and boundary conditions is investigated in this study. Loading protocols that are representative of seismic demands on first-story columns are developed through simulations of complete frames subjected to collapse-inducing seismic loading. A set of deep columns that cover a wide range of both global and local slenderness ratios representative of commercially available deep sections is used to investigate and codify the effects of three key parameters: level of axial loading, global slenderness (), and web slenderness (). Current design recommendations are critiqued and modified provisions that incorporate the influential parameters identified in this study are proposed for designing highly ductile members for seismic applications. The new provisions are proposed in a format that can facilitate adoption into future specifications.
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Acknowledgments
This work was supported by the University of Michigan and US NSF Grant Nos. CMMI-1344372 and ACI-1638186. Any opinions, findings, conclusions, and recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsor.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 4 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 26, 2017
Accepted: Oct 13, 2017
Published online: Jan 26, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 26, 2018
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