Numerical studies into factors affecting structural behaviour of composite cold-formed steel and timber flooring systems

Karki, Dheeraj; Far, Harry; Saleh, Ali

doi:10.1016/j.jobe.2021.102692

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…degree of shear connection and shear stiffness), to enable the two components to work together as a composite system, to resist flexural loads [4]. The degree of composite action achieved is a function of various parameters such as fastener spacing and type, the presence of adhesives, joist gauge, floorboard thickness and floorboard stiffness [4][5][6][7][8][9]. For instance, the use of a wood adhesive alongside screws at 150mm (which is the current industry standard) in composite floors exhibited around 40% increase in flexural stiffness and 100% increase in bending moment capacity, when compared to the performance of bare steel specimens [7].…”

Section: Introductionmentioning

confidence: 99%

“…Existing research has demonstrated significant improvements to the floor flexural performance if the composite action between CFS and timber boards is exploited [5][6][7][8][9]. Such composite action relies on the efficacy of connection (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Without adhesives and a similar screw spacing, the increase in flexural stiffness was limited to 17%, compared to corresponding bare steel specimens [7,9]. Other parameters investigated in the literature include the effect of joist gauge, board type, and board thickness on composite performance [4][5][6][7][8], leading to the development and verification of design equations [5]. Nevertheless, the effect of span length on composite efficiency has not been investigated to date.…”

Section: Introductionmentioning

confidence: 99%

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An experimental investigation into span length effect in composite CFS and timber‐based flooring systems

Raffoul,

Sun,

McCrum

2023

ce papers

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Cold‐formed steel (CFS) panelised built‐offsite modern methods of construction offer economy of scale, high precision, reduction in construction waste and a more streamlined manufacturing and construction process, compared to traditional construction. Floors made with CFS joists and timber‐based flooring systems, often jointed using screws and structural adhesives, have become increasingly popular. Nevertheless, the beneficial effect of the timber flooring on overall floor structural behaviour is often ignored in design due to limited understanding of CFS joist‐timber board interaction and the effect of various influencing parameters. This article investigates, experimentally, the structural performance of such composite floors. This paper presents eighteen large scale bending tests of CFS composite floors and five pushout tests to investigate the effect of span length on composite action. The results demonstrate that a high degree of composite action can be achieved when both screws and adhesives are utilised, resulting in around 40% increase in flexural stiffness when compared to joist performance without boards. This can lead to a more efficient and sustainable design of CFS joisted floors. The results also show that further research is needed to extend existing design equations to cover short span lengths.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An experimental investigation into span length effect in composite CFS and timber‐based flooring systems

Raffoul,

Sun,

McCrum

2023

ce papers

View full text Add to dashboard Cite

show abstract

“…Fratamico et al (2018) and Kyprianou et al (2018) examined the performance of CFS studs braced with OSB panels, while a series of tests was undertaken by Loss and Frangi (2017) to explore the structural response of innovative steeltimber hybrid floor diaphragms. Kyvelou et al (2015;2017a; and Karki et al (2021) investigated the structural performance of floors comprising cold-formed steel joists and woodbased panels, with significant structural benefits observed due to the mobilisation of composite action. Henriques et al (2017) conducted experimental and numerical analyses on light steel framing panels connected with OSB panels using screw connectors, with the yielded results…”

Section: Introductionmentioning

confidence: 99%