Post-Fire Behavior of Cold-Formed Steel Semi-Oval Hollow Stub Columns
Publication: Journal of Structural Engineering
Volume 150, Issue 10
Abstract
This study deals with the compressive performance of cold-formed steel semi-oval hollow section (CFS-SOHS) stub columns after exposure to a standard fire. An experimental program was carried out on 17 CFS-SOHS stub columns after four different fire exposure temperatures, namely 300°C, 550°C, 750°C, and 900°C. Details of post-fire test specimens, material properties, stub column test arrangements, and results are described and discussed in this paper. A finite-element model was established and then validated by the experimental compressive performance in terms of ultimate strength, load-end shortening response, and failure mode. Parametric analyses were then performed on 160 post-fire CFS-SOHS stub column specimens to furnish more numerical data. The acquired experimental and numerical compressive strengths were compared against the design predictions by the direct strength method (DSM) initially calibrated for open sections, and the modified DSM initially proposed for CFS-SOHS without fire. A reliability analysis was performed. Comparisons show that the modified DSM offers accurate and reliable post-fire residual resistance predictions for CFS-SOHS stub columns after exposure to the standard fire.
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Data Availability Statement
All data, models, and code generated or used during the study are available upon reasonable request.
Acknowledgments
The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 17267416). The authors would also like to thank the support from the National Natural Science Foundation of China (Nos. 52108157 and 52378167).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 10 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Oct 30, 2023
Accepted: Feb 22, 2024
Published online: Aug 1, 2024
Published in print: Oct 1, 2024
Discussion open until: Jan 1, 2025
ASCE Technical Topics:
- Cold-formed steel
- Columns
- Compressive strength
- Design (by type)
- Disaster risk management
- Disasters and hazards
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Fire resistance
- Fires
- Man-made disasters
- Material mechanics
- Material properties
- Materials engineering
- Metals (material)
- Steel
- Steel columns
- Strength of materials
- Structural behavior
- Structural design
- Structural engineering
- Structural members
- Structural strength
- Structural systems
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