Local Buckling of Fire-Exposed Aluminum Members: New Design Model
Publication: Journal of Structural Engineering
Volume 136, Issue 1
Abstract
Design models for local buckling of fire-exposed aluminum sections are currently lacking. Based on analyses with validated finite-element models, this paper investigates local buckling of extruded sections with stress-strain relationships representative for fire-exposed aluminum alloys. Due to the fact that these stress-strain relationships are more curved than at ambient temperature, existing design models developed for ambient temperature cannot be used for fire design. This paper presents a new design model for local buckling under fire conditions. The study concludes that the local buckling resistance decreases less fast than the plastic capacity at increasing temperature. This is mainly due to the fact that the ratio between the modulus of elasticity and the 0.2% proof stress increases with increasing temperature for structural aluminum alloys.
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Acknowledgments
This research was carried out under the Project No. UNSPECIFIEDMC1.02147 in the framework of the Research Program of the Materials innovation institute M2i (www.m2i.nl), the former Netherlands Institute for Metals Research.UNSPECIFIED
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© 2010 ASCE.
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Received: Apr 1, 2008
Accepted: Jul 31, 2009
Published online: Aug 6, 2009
Published in print: Jan 2010
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