Analytical modelling of cold-formed steel-to-timber connections with inclined screws

Vella, Nathan; Gardner, Leroy; Buhagiar, Spiridione

doi:10.1016/j.engstruct.2021.113187

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…Cold-formed steel (CFS) joists with timber-based flooring present an attractive floor solution that offers rapid manufacture and construction, sustainability and a high strength-to-weight ratio compared to other systems [1][2][3][4]. These floors often consist of CFS channel (C) sections closely spaced (400mm or 600mm) with floorboards (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Such composite action relies on the efficacy of connection (e.g. 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].…”

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%

“…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%

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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%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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show abstract

“…Furthermore, structural elements made of wood-based materials can also be combined with each other [ 19 ]. Recently, the experimental behaviour of timber-concrete and steel-timber composite structures has been investigated in a number of studies [ 20 , 21 , 22 ]. However, the behaviour of aluminium-timber composite structures has only been studied in a few tests [ 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behaviour of Aluminium-Timber Composite Connections with Screws and Toothed Plates

Chybiński

Polus

2021

Materials

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This paper presents an investigation of the load-slip behaviour of aluminium-timber composite connections. Toothed plates with bolts are often used for connecting timber structural members with steel structural members. In this paper, toothed plates (C2-50/M10G, C2-50/M12G or C11-50/M12) have been used as reinforcement in aluminium-timber screwed connections for the first time. The push-out test specimens consisted of laminated veneer lumber slabs, aluminium alloy beams, and hexagon head wood screws (10 mm × 80 mm and 12 mm × 80 mm). Of the specimens, 12 additionally had toothed plates as reinforcement, while 8 had no reinforcement. The load carrying-capacity, the mode of failure and the load-slip response of the strengthened and non-strengthened screwed connections were investigated. The use of toothed plate connectors was found to be effective in increasing the strength of aluminium-timber composite connections and ineffective in improving their stiffness. The examined stiffness and strength of the connections can be used in the design and numerical modelling of aluminium-timber composite beams with reinforced screwed connections.

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Withdrawal strength of hexagon head wood screws in laminated veneer lumber

Chybiński

Polus

2022

Eur. J. Wood Prod.

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Analytical modelling of cold-formed steel-to-timber connections with inclined screws

Cited by 9 publications

References 16 publications

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

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

Mechanical Behaviour of Aluminium-Timber Composite Connections with Screws and Toothed Plates

Withdrawal strength of hexagon head wood screws in laminated veneer lumber

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