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Structural Fire Performance of Concrete-Filled Built-Up Cold-Formed Steel Columns

Tijdschriftbijdrage - Tijdschriftartikel

Concrete-filled composite columns are widely used in the construction industry, exploiting the benefits of combining steel and concrete, providing, for instance, high load-bearing capacities and enhanced fire resistance. These solutions are extensively used in high-rise buildings and/or when high fire resistance performance requirements are imposed. In this exploratory research, a new type of concrete-filled composite column is investigated using fire resistance tests. Promoting the use of cold-formed steel products and developing innovative solutions for low-rise buildings with lower passive fire protection requirements led to the solutions presented in this research. Hence, a set of fire-resistance tests were undertaken on concrete-filled closed built-up cold-formed steel columns, where single cold-formed steel shapes are combined and fastened to create a box-shaped cross-section. The experimental results were then compared with the corresponding bare steel solutions to assess, in detail, the observed enhancements. Additionally, the effect of restraint on thermal elongation was assessed.
Tijdschrift: MATERIALS
Issue: 6
Volume: 15
Aantal pagina's: 14
Jaar van publicatie:2022
Trefwoorden:cold-formed steel, built-up section, concrete-filled, load-bearing, capacity, local-global buckling interaction, global buckling, fastener, spacing