Cold-formed Steel-Concrete Composite Beams with Back-to-Back Channel Sections in Bending

Andrea Rajič; Ivan Lukačevič; Davor Skejič; Viorel Ungureanu

doi:10.28991/CEJ-2023-09-10-01

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Andrea Rajič Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Kačičeva 26,, Croatia
Ivan Lukačevič
ivan.lukacevic@grad.unizg.hr
Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Kačičeva 26,, Croatia https://orcid.org/0000-0002-0804-6981
Davor Skejič Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Kačičeva 26,, Croatia
Viorel Ungureanu 2) Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara, 300224 Timisoara, Ioan Curea 1, Romania. 3) Laboratory of Steel Structures, Romanian Academy, Timisoara Branch, 300223 Timisoara, Mihai Viteazu 24,, Romania

Vol. 9 No. 10 (2023): October

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Steel-concrete composite structures are very attractive because of their characteristics, which can be emphasised by using cold-formed steel instead of hot-rolled ones. This paper presents possible analytical approaches and a parametric finite element study of cold-formed steel-concrete composite beams in bending. Analysed beams are formed of back-to-back cold-formed steel channels and concrete slabs connected by demountable shear connectors. A solid concrete slab on a profiled metal sheet analysed. Also, the study investigates the influence of corrugated web between the back-to-back channels of different thicknesses. In the case of a corrugated web, the distance between the shear connectors is increased. Furthermore, different degrees of shear connection, shear connector quality, and their arrangements are considered. An analytical study is based on full and partial shear connection assumptions and non-linear bending resistance. It is shown that the steel channel thickness and degree of shear connection significantly influence the beam bending capacity as well as concrete slab configurations. Conversely, a discrete connection between steel elements has a minor effect. A comparison of the maximum obtained bending capacities in FE analyses is in good agreement with analytical approaches for full and partial shear connections.

Doi: 10.28991/CEJ-2023-09-10-01

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Publication Start Year:	2015
JCR 2023 Impact Factor (IF):	4.3
JIF QUARTILE:	Q1
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Cold-formed Steel-Concrete Composite Beams with Back-to-Back Channel Sections in Bending

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