Development of Temperature and Constraint-Dependent Column Demand-Capacity Curves and Their Validation through Hybrid Fire Simulations
Publication: Journal of Structural Engineering
Volume 147, Issue 4
Abstract
The axial capacity and force demand of a steel column are expected to change continuously during a fire incident. In assessing the structural performance in the event of a fire, it is important to monitor both the capacity and force demand at the entire temperature range. Although the axial capacity of steel columns at elevated temperatures can be calculated with closed form-equations in the design codes, limited information is available regarding the changes in force demand due to the time-dependent temperature load. This paper proposes a set of demand-capacity curves for steel columns at elevated temperatures with various initial force and constraint conditions. A series of full-scale steel columns are tested using the hybrid fire simulation (HFS) method to validate the developed demand-capacity curves. The hybrid fire simulation results are also replicated numerically using a finite element model. The test results match the developed curve with minimal calibration. The developed curves can be used as a quick tool to evaluate the axial capacity and force demand of a steel column at elevated temperatures.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research is financially supported by the Korea Institute of Civil Engineering and Building Technology (KICT, Grant No. 20180023-001).
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Published In
Journal of Structural Engineering
Volume 147 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 12, 2020
Accepted: Dec 2, 2020
Published online: Feb 1, 2021
Published in print: Apr 1, 2021
Discussion open until: Jul 1, 2021
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