Shear performance of lightweight concrete filled hollow flange cold-formed steel beams AITranslate
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Highlights • Shear characteristics of lightweight concrete filled HFCFS beams were investigated. • The developed FE modelling technique was validated using the experimental results. • The influential parameters were taken into account through parametric analysis. • An improved design formulation is proposed to predict the shear resistance of HFCFS. Concrete-infilled hollow flange cold-formed steel (CF-HFCFS) beams have gained attention in the construction practices owing to many benefits in terms of their structural performances and applicability. The concrete infill ensures better structural performance by restraining the buckling instabilities of thin-walled cold-formed steel elements. However, the shear strength characteristics of CF-HFCFS are not systematically explored yet and hence there is a lack of understanding on the shear strength characteristics of CF-HFCFS beams. Therefore, in this research, shear characteristics were investigated through numerical studies by establishing and analysing three-dimensional finite element (FE) models of CF-HFCFS beams. The developed FE models were verified against the experimental data in terms of failure modes, ultimate shear capacities, and load-displacement characteristics. Then a series of parametric analyses were carried out to investigate the shear behaviour of CF-HFCFS beams against the effects of geometrical (steel thickness, beam depth) and mechanical (yield strength of steel and compressive strength of concrete) properties to further verify the shear characteristics of CF-HFCFS. Lightweight normal and lightweight high strength concrete materials were considered as infill. Also, the influence of the concrete infill on the ultimate shear capacity of the CF-HFCFS beams was evaluated through parametric studies. The ultimate shear capacities were compared against the already available design provisions. Consequently, based on the data established through of parametric analyses, modified design provisions are developed to estimate the ultimate shear capacity of CF-HFCFS beams.
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DOI：https://doi.org/10.1016/j.cscm.2022.e01160
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Highlights • Shear characteristics of lightweight concrete filled HFCFS beams were investigated. • The developed FE modelling technique was validated using the experimental results. • The influential parameters were taken into account through parametric analysis. • An improved design formulation is proposed to predict the shear resistance of HFCFS. Concrete-infilled hollow flange cold-formed steel (CF-HFCFS) beams have gained attention in the construction practices owing to many benefits in terms of their structural performances and applicability. The concrete infill ensures better structural performance by restraining the buckling instabilities of thin-walled cold-formed steel elements. However, the shear strength characteristics of CF-HFCFS are not systematically explored yet and hence there is a lack of understanding on the shear strength characteristics of CF-HFCFS beams. Therefore, in this research, shear characteristics were investigated through numerical studies by establishing and analysing three-dimensional finite element (FE) models of CF-HFCFS beams. The developed FE models were verified against the experimental data in terms of failure modes, ultimate shear capacities, and load-displacement characteristics. Then a series of parametric analyses were carried out to investigate the shear behaviour of CF-HFCFS beams against the effects of geometrical (steel thickness, beam depth) and mechanical (yield strength of steel and compressive strength of concrete) properties to further verify the shear characteristics of CF-HFCFS. Lightweight normal and lightweight high strength concrete materials were considered as infill. Also, the influence of the concrete infill on the ultimate shear capacity of the CF-HFCFS beams was evaluated through parametric studies. The ultimate shear capacities were compared against the already available design provisions. Consequently, based on the data established through of parametric analyses, modified design provisions are developed to estimate the ultimate shear capacity of CF-HFCFS beams.
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| GB/T 7714-2015 | [1] Mohamed Sifan, Perampalam Gatheeshgar, Brabha Nagaratnam, et al. Case Studies in Construction Materials, 2022(17). DOI:10.1016/j.cscm.2022.e01160. |
| MLA | [1] Mohamed Sifan, et al., Case Studies in Construction Materials, no. 17, 2022, https://doi.org/10.1016/j.cscm.2022.e01160. |
| APA | [1] Mohamed Sifan, Perampalam Gatheeshgar, Brabha Nagaratnam, Keerthan Poologanathan, Satheeskumar Navaratnam, Julian Thamboo, & Marco Corradi. (2022). Case Studies in Construction Materials(17). https://doi.org/10.1016/j.cscm.2022.e01160 |
| IEEE | [1] Mohamed Sifan, Perampalam Gatheeshgar, Brabha Nagaratnam, Keerthan Poologanathan, Satheeskumar Navaratnam, Julian Thamboo, and Marco Corradi, Case Studies in Construction Materials, no. 17, 2022, doi: 10.1016/j.cscm.2022.e01160. keywords: {Hollow flange coldformed steel beam;Concrete infill;Lightweight concrete;Composite beams;Ultimate shear capacity;Numerical analysis;Design guidelines} |