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Behavior of Axially Loaded Steel Short Columns Subjected to A Localized Fire

Published

Author(s)

Chao Zhang, Lisa Y. Choe, Mina S. Seif

Abstract

Current structural re design approaches are based on uniform heating conditions. Steel short columns in real buildings may be exposed to non-uniform heating conditions in accident res. This paper investigates numerically the behavior of steel short columns subjected to a localized re. The e ffect of non-uniform heating condition on the buckling temperature of axially loaded steel short columns was studied. Simple thermal models were presented to calculate the temperature of steel short columns in localized re conditions. Sequentially coupled thermal-mechanical simulations were conducted. The study finds that the buckling temperature of steel short columns in a localized fire is much higher than that of columns with a uniform temperature. The buckling temperature in a localized fi re may be slightly lower than that in the standard ISO834 fire. Approaches given in the Eurocode give conservative results of buckling temperature for steel short columns subjected to localized fires.
Citation
Journal of Constructional Steel Research
Volume
111

Keywords

Steel short columns, Localized re, Non-uniform heating condition, Temperature gradient, Local buckling, Numerical simulation

Citation

Zhang, C. , Choe, L. and Seif, M. (2015), Behavior of Axially Loaded Steel Short Columns Subjected to A Localized Fire, Journal of Constructional Steel Research, [online], https://doi.org/10.1016/j.jcsr.2014.11.012 (Accessed July 14, 2024)

Issues

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Created June 23, 2015, Updated November 10, 2018