Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Concrete-filled cold-formed steel (CF-CFS) built-up columns under compression: Test and design
https://orcid.org/0000-0001-9399-104X
https://orcid.org/0000-0001-8590-5885
https://orcid.org/0000-0002-8342-3695
https://orcid.org/0000-0003-2543-0114
Abstract This paper aims to present the axial behavior of a new composite column through an experimental and computational investigation. Four distinct configurations of novel CF-CFS columns were evaluated. The test setup and results were documented in detail, including load-bearing capacity, load–deformation, and failure modes. The buckling behavior of the steel components (thin-walled steel profiles) was investigated. The mitigation of local buckling caused by concrete supporting thin-walled plates was explored. Additionally, numerical simulations were performed and calibrated against the experimental results. A comparison was made between experimental results and analytical prediction according to EN 1994-1-1 formulations to assess the validity of current codes. The effective cross-sectional areas were also evaluated for the buckling load prediction since Class 4 profiles were used. The results showed that the analytical predictions according to the EN 1994-1-1 (taking to account steel gross cross-section and buckling curve a) are conservative for square CF-CFS columns and unconservative for rectangular sections. While for the case of rectangular CF-CFS columns, the experimental results and design prediction according to the EN 1994-1-1 are in good agreement when steel effective cross-section area and buckling curve-c are considered. Reliability analysis was also performed, resulting in a more reliable design methodology by considering the effective cross-sectional area for CFS profiles.
Highlights Investigate the novel concrete-filled cold-formed steel built-up columns experimentally. Evaluating the contribution of the composite column components. Developing a numerical model to understand the component contribution. Comparison of the experimental results and code predictions.
Concrete-filled cold-formed steel (CF-CFS) built-up columns under compression: Test and design
https://orcid.org/0000-0001-9399-104X
https://orcid.org/0000-0001-8590-5885
https://orcid.org/0000-0002-8342-3695
https://orcid.org/0000-0003-2543-0114
Abstract This paper aims to present the axial behavior of a new composite column through an experimental and computational investigation. Four distinct configurations of novel CF-CFS columns were evaluated. The test setup and results were documented in detail, including load-bearing capacity, load–deformation, and failure modes. The buckling behavior of the steel components (thin-walled steel profiles) was investigated. The mitigation of local buckling caused by concrete supporting thin-walled plates was explored. Additionally, numerical simulations were performed and calibrated against the experimental results. A comparison was made between experimental results and analytical prediction according to EN 1994-1-1 formulations to assess the validity of current codes. The effective cross-sectional areas were also evaluated for the buckling load prediction since Class 4 profiles were used. The results showed that the analytical predictions according to the EN 1994-1-1 (taking to account steel gross cross-section and buckling curve a) are conservative for square CF-CFS columns and unconservative for rectangular sections. While for the case of rectangular CF-CFS columns, the experimental results and design prediction according to the EN 1994-1-1 are in good agreement when steel effective cross-section area and buckling curve-c are considered. Reliability analysis was also performed, resulting in a more reliable design methodology by considering the effective cross-sectional area for CFS profiles.
Highlights Investigate the novel concrete-filled cold-formed steel built-up columns experimentally. Evaluating the contribution of the composite column components. Developing a numerical model to understand the component contribution. Comparison of the experimental results and code predictions.
Concrete-filled cold-formed steel (CF-CFS) built-up columns under compression: Test and design
https://orcid.org/0000-0001-9399-104X
https://orcid.org/0000-0001-8590-5885
https://orcid.org/0000-0002-8342-3695
https://orcid.org/0000-0003-2543-0114
Abstract This paper aims to present the axial behavior of a new composite column through an experimental and computational investigation. Four distinct configurations of novel CF-CFS columns were evaluated. The test setup and results were documented in detail, including load-bearing capacity, load–deformation, and failure modes. The buckling behavior of the steel components (thin-walled steel profiles) was investigated. The mitigation of local buckling caused by concrete supporting thin-walled plates was explored. Additionally, numerical simulations were performed and calibrated against the experimental results. A comparison was made between experimental results and analytical prediction according to EN 1994-1-1 formulations to assess the validity of current codes. The effective cross-sectional areas were also evaluated for the buckling load prediction since Class 4 profiles were used. The results showed that the analytical predictions according to the EN 1994-1-1 (taking to account steel gross cross-section and buckling curve a) are conservative for square CF-CFS columns and unconservative for rectangular sections. While for the case of rectangular CF-CFS columns, the experimental results and design prediction according to the EN 1994-1-1 are in good agreement when steel effective cross-section area and buckling curve-c are considered. Reliability analysis was also performed, resulting in a more reliable design methodology by considering the effective cross-sectional area for CFS profiles.
Highlights Investigate the novel concrete-filled cold-formed steel built-up columns experimentally. Evaluating the contribution of the composite column components. Developing a numerical model to understand the component contribution. Comparison of the experimental results and code predictions.
Concrete-filled cold-formed steel (CF-CFS) built-up columns under compression: Test and design
Rahnavard, Rohola (Autor:in) / Craveiro, Hélder D. (Autor:in) / Lopes, Marco (Autor:in) / Simões, Rui A. (Autor:in) / Laím, Luís (Autor:in) / Rebelo, Carlos (Autor:in)
Thin-Walled Structures ; 179
05.06.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Closed built‐up cold‐formed steel columns under compression
| Wiley | 2023
Closed built‐up cold‐formed steel columns under compression
| Wiley | 2023