Numerical Investigation of Shear Connection in Cold‐formed Steel‐concrete Composite Beam

Ćurković, Ivan; Lukačević, Ivan; Žuvelek, Vlaho; Rajić, Andrea

doi:10.1002/cepa.1827

Cited by 5 publications

(7 citation statements)

References 19 publications

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“…Normal behaviour defines 'hard contact' that minimises the penetration of the slave surface into the master surface and prevents the transfer of tensile stresses across the interface [26]. The tangential behaviour allows horizontal contact between the surfaces, and these contacts are considered to be a penalty formulation with a friction coefficient of 0.3, which is in the range of values adopted by a previous study [37]. Previous studies have investigated how the value of the friction coefficient affects the behaviour of this type of model, considering friction coefficients of 0.3-0.5 [20,[38][39][40].…”

Section: Interaction Conditionsmentioning

confidence: 99%

Parametric Finite Element Analyses of Demountable Shear Connection in Cold-Formed Steel–Concrete Composite Beams

Žuvelek,

Ćurković,

Skejić

et al. 2024

Buildings

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It is known that steel–concrete composite systems are very efficient. However, such steel–concrete composite systems can be optimised using cold-formed steel elements and innovative shear connections. In other words, by considering demountability and reusability, the negative impact of the built environment on the whole ecosystem can ultimately be reduced. This paper, therefore, presents a numerical study of an innovative solution for a composite floor system consisting of built-up cold-formed sections and concrete slabs. Through parametric numerical analysis, parameters such as the diameter and quality of bolts, the concrete class, the type of concrete slab, and the steel quality of sections and bolts were varied. The numerical analysis results show that the system with a solid concrete slab had a higher shear resistance and ductility than the system with a concrete slab made with profiled sheeting and showed different failure modes. The presented results form the basis for push-out tests for the proposed shear connection types.

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Section: Interaction Conditionsmentioning

confidence: 99%

Parametric Finite Element Analyses of Demountable Shear Connection in Cold-Formed Steel–Concrete Composite Beams

Žuvelek,

Ćurković,

Skejić

et al. 2024

Buildings

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“…Selvaraj et al [66] used the same size and shape of geometry as the CFS built-up column and enabled a quick erection process. Additionally, investigations into shear connections, such as bolts and composite dowel rib connectors, have highlighted the importance of balancing stiffness and ductility in achieving optimal performance [1,67]. Ćurković et al [67] investigated two types of shear connections suitable for the proposed composite solution.…”

Section: Connectionsmentioning

confidence: 99%

A Critical Review of Cold-Formed Steel Built-Up Composite Columns with Geopolymer Concrete Infill

Sara Simon,

Kafle,

Al-Ameri

2024

J. Compos. Sci.

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Concrete-filled built-up cold-formed steel (CFS) columns offer enhanced load-carrying capacity, improved strength-to-weight ratios, and delayed buckling through providing internal resistance and stiffness due to the concrete infill. Integrating sustainable alternatives like self-compacting geopolymer concrete (SCGC) with low carbon emissions is increasingly favoured for addressing environmental concerns in construction. This review aims to explore the current knowledge regarding CFS built-up composite columns and the performance of SCGC within them. While research on geopolymer concrete-filled steel tubes (GPCFSTs) under various loads has demonstrated high strength and ductility, investigations into built-up sections remain limited. The literature suggests that geopolymer concrete’s superior compressive strength, fire resistance, and minimal shrinkage render it highly compatible with steel tubular columns, providing robust load-bearing capacity and gradual post-ultimate strength, attributed to the confinement effect of the outer steel tubes, thereby preventing brittle failure. Additionally, in built-up sections, connector penetration depth and spacing, particularly at the ends, enhances structural performance through composite action in CFS structures. Consequently, understanding the importance of using a sustainable and superior infill like SCGC, the cross-sectional efficiency of CFS sections, and optimal shear connections in built-up CFS columns is crucial. Moreover, there is a potential for developing environmentally sustainable built-up CFS composite columns using SCGC cured at ambient temperatures as infill.

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“…The used concrete class is C25/30, in accordance with [36]. To define concrete damage behavior, different concrete damage plasticity (CDP) models can be found in the literature [37][38][39][40][41][42]. The CDP model (shown in Figure 5a), in accordance with [13,37,38], is used to model concrete.…”

Section: Parametric Numerical Analysesmentioning

confidence: 99%

“…To define concrete damage behavior, different concrete damage plasticity (CDP) models can be found in the literature [37][38][39][40][41][42]. The CDP model (shown in Figure 5a), in accordance with [13,37,38], is used to model concrete. The used material for all steel elements is S350 GD (Figure 5b), and the bolt quality is 8.8 (Figure 5c).…”

Section: Parametric Numerical Analysesmentioning

confidence: 99%

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

et al. 2023

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This paper investigates the bending resistance of an innovative lightweight composite floor system, LWT-FLOOR. The system consists of built-up cold-formed steel elements that are spot-welded and connected to the concrete slab using demountable shear connectors. As the system under investigation is new, the existing standards do not provide guidelines for calculating its bending resistance. This paper gives an overview of different analytical approaches and a comparison of calculated results using bending capacities from the numerical parametric study. Within the numerical parametric study, the influence of the height of the steel beam, the type and degree of shear connection, the connection between the steel elements, and the thickness of the corrugated web used for the bending capacity are investigated. Numerical results for the full shear connections resulted in lower bending capacities than the analytically calculated plastic bending resistances. However, numerically obtained bending capacities for partial shear connections were found to exceed the calculated characteristic non-linear bending resistances and bending resistances for partial shear connections. The obtained results will comprise the basis for further experimental tests, which will support the search for an optimal analytical approach for the bending resistance of the proposed composite system.

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Numerical Investigation of Shear Connection in Cold‐formed Steel‐concrete Composite Beam

Cited by 5 publications

References 19 publications

Parametric Finite Element Analyses of Demountable Shear Connection in Cold-Formed Steel–Concrete Composite Beams

Parametric Finite Element Analyses of Demountable Shear Connection in Cold-Formed Steel–Concrete Composite Beams

A Critical Review of Cold-Formed Steel Built-Up Composite Columns with Geopolymer Concrete Infill

Numerical Study on the Bending Resistance of Lightweight Built-Up Steel-Concrete Composite Beams

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