Fire Resistance of Gypsum Board Protected Steel Columns with High Load Ratios
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VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 144, Issue 11
Abstract
A new relationship was developed for estimating fire resistance ratings of gypsum board protected steel columns with high load ratios. The proposed formula can be used to adjust the limiting steel temperature, the commonly used 1,000°F (538°C) by the US standards, for steel columns with high load ratios. A two-dimensional finite-element analysis (2D FEA) heat transfer model, using Abaqus, was established to analyze the heat transfer of gypsum board protected steel columns exposed to the ASTM standard E119 temperature rising history. The numerical model was validated against available fire resistance ratings of protected steel columns, full-scale column fire resistance tests, a wall assembly fire test, and a column test that included a different range of steel temperatures. Results were also compared with those by SAFIR, one of the main available software packages for analysis of structures in fire. Steel temperature histories were used to extract fire endurances, and the extracted fire endurances were then used to construct a formula for predicting fire endurance for gypsum board protected steel columns at critical or limiting temperatures lower than 1,000°F (538°C).
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Acknowledgments
The authors would like to thank Dr. Hosam Ali for his input and support and Dr. Artemis Agelaridou for her contributions in the initial stage of this study.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 11 • November 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Dec 13, 2016
Accepted: May 9, 2018
Published online: Sep 3, 2018
Published in print: Nov 1, 2018
Discussion open until: Feb 3, 2019
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