RESEARCH PAPER
Reliability and Fire Performance of Built-up (Battened) Cold-formed Steel Columns: Numerical study
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College of Fire Protection Engineering, China People's Police University, China
Submission date: 2024-08-14
Final revision date: 2024-10-03
Acceptance date: 2024-11-11
Online publication date: 2024-11-14
Publication date: 2024-11-14
Corresponding author
Yang Zhao
College of Fire Protection Engineering, China People's Police University, 065000, Langfang, China
HIGHLIGHTS
- Enhancing fire resistance in cold-formed steel columns for structural safety.
- Utilizing ABAQUS to study steel thickness, grade, and cross-sectional shapes.
- Thicker steel (1.95 mm) delays failure to 73.49 min, improving fire resistance.
- Grade 450 steel lasts 61.46 min, outperforming Grade 550 steel at 40.94 min.
- Effective design and materials crucial for better fire safety in CFS structures.
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ABSTRACT
Cold-formed steel (CFS) columns play a crucial role in modern construction due to their lightweight, prefabricated, and recyclable characteristics, contributing significantly to structural safety and reliability. However, unprotected CFS columns lose their load-bearing capacity within 10-15 minutes under fire conditions. This study reviews recent advancements aimed at improving the fire resistance of CFS columns, focusing on factors such as steel thickness, grade, cross-sectional shape, and fire protection materials. Using ABAQUS software, validated against experimental data, parametric studies reveal that thicker sections and higher-grade steels enhance fire resistance, delaying structural failure. Fire protection strategies, such as plasterboard encasement, further bolster safety. The Complex cross-sectional shape demonstrated the highest load capacity (178.51 kN), while G450 steel outperformed other grades in both load capacity and fire resistance. Columns with 1.95 mm thickness provided the longest failure time (73.49 minutes).