The predictive model for strength of inclined screws as shear connection in timber-concrete composite floor

Moshiri, Farzad; Gerber, Christophe; Valipour, Hamid; Shrestha, Rijun; Crews, Keith

doi:10.1201/b15320-189

Cited by 2 publications

(2 citation statements)

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“…Such improvements have yet to be assessed and quantified for cold-formed steel-timber (CFS-T) connections. Research has also shown that the load-slip behaviour of dowelled timber connections is characterised by complex interactions of material properties, component interactions and various failure modes [2,16,25]. The focus of the present study is therefore to develop a clear understanding of CFS-T connections by carrying out tests on the constituent materials and on the interactions between the three components: timber, steel and the screw connector.…”

Section: Introductionmentioning

confidence: 99%

“…Various studies carried out on timber-timber [11][12][13][14][15][16][17][18], timber-concrete [19][20][21][22][23][24][25] and timber-steel [26] connections have highlighted the significant improvement in both strength and slip modulus when using inclined screws and hence mobilizing the tensile rather than simply the bending properties of the connector. Inclining the screws also reduces the risk of separation of the two composite elements under shear loading due to the force component within the connector acting at perpendicular to the shear plane.…”

Section: Introductionmentioning

confidence: 99%

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Experimental analysis of cold-formed steel-to-timber connections with inclined screws

2020

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An experimental investigation into the behaviour of connections between cold-formed steel and timber components, formed with inclined screws, is presented. A series of material tests was firstly carried out to assess the behaviour and limitations of each component of the system under investigation. These were supplemented by three types of interaction test: timber embedment, screw head pull-through and screw thread withdrawal, all aimed at developing a better understanding of the behaviour of the different components of the connection. The slip modulus and peak load-carrying capacity of twelve connection configurations were determined through a series of push-out tests. The results obtained were compared to the typical benchmark arrangement in which the screws were driven in perpendicular to the steel-timber interface.Component variations included the type of timberparticle board and plywood, the thickness of the steel -1.5 mm and 2.4 mm thick, the inclination of the screws -0° and 45°, and the presence or not of wings on the screws. The results showed that non-winged screws inclined at 45° gave up to about a 30% increase in peak load-carrying capacity and about a 140% increase in slip modulus when compared to the reference specimen.

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Section: Introductionmentioning

confidence: 99%