Author(s): Craveiro, Hélder D. ; Rahnavard, Rohola ; Henriques, José ; Simões, Rui A.
Date: 2022
Persistent ID: https://hdl.handle.net/10316/103358
Origin: Estudo Geral - Universidade de Coimbra
Project/scholarship: info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC/PT;
Subject(s): cold-formed steel; built-up section; concrete-filled; load-bearing capacity; local-global buckling interaction; global buckling; fastener spacing
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.
FCT - 2020.03588.CEECIND. FCT - research project PTDC/ECI-EGC/31858/2017—INNOCFSCONC—innovative hybrid structural solutions using cold-formed steel and lightweight concrete financed by FEDER funds through the Competitivity Factors Operational Programme-COMPETE and by national funds through FCT, PCIF/AGT/0062/2018—INTERFACESEGURA—Segurança e Resiliência ao Fogo das Zonas e Interface Urbana-Florestal.
