Composite dowels as load introduction devices in concrete-filled steel tubular columns

Cardoso, Hermano de Sousa; Aguiar, Otavio Prates; Caldas, Rodrigo Barreto; Fakury, Ricardo Hallal

doi:10.1016/j.engstruct.2020.110805

Cited by 11 publications

(16 citation statements)

References 25 publications

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“…This relationship was composed of two main parts: an idealized relationship which can be consulted in EN 1992-1-1 [15] and a post-failure [16]. The formulae and fitting parameters required for the extension curve are described elsewhere [16,17]. The concrete in tension was represented using a crack-opening relationship suggested by Cornelissen et al [19], as shown in Fig 6b . Additional relationships to characterize the damage initiation in tension and compression must be specified in the CPD model.…”

Section: Materials Modelling Of Concretementioning

confidence: 99%

Shear Capacity of Channel Shear Connectors Applied in Composite Slabs with Profiled Steel Decking

Cardoso,

Pupin

2023

ce papers

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This paper assesses the shear capacity and the structural behaviour of channel connectors in composite slabs. Push‐out specimens were analyzed numerically by using the finite element program ABAQUS. For the studied solution, regular openings at the lower flange in the profiled decking are considered to allow the welded channel connector to pass through. The numerical model was calibrated against experimental outputs on push‐out tests found in the literature. Then, the influence of steel decking thickness on load capacity, stiffness and ductility of channel connectors in composite slabs was also assessed. In addition, it was concluded that safe predictions of load capacity could be obtained by including reduction factors in the Canadian design approach.

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Section: Materials Modelling Of Concretementioning

confidence: 99%

Shear Capacity of Channel Shear Connectors Applied in Composite Slabs with Profiled Steel Decking

Cardoso,

Pupin

2023

ce papers

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“…In the 1990s, Wurzer (1998) and Zapfe (2001) developed a new type shear connector with open cut-outs in the steel strip or called composite dowel. The Composite dowels can make full advantage of effective and economic combination of steel and concrete without using top steel flange (Cardoso et al, 2020; Classen et al, 2016; Classen and Gallwoszus, 2016; Seidl et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on structural behavior of folded dowel shear connection

Huang,

Chen,

2024

Advances in Structural Engineering

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A new type composite dowel shear connector was proposed by introducing folded angles in the steel dowels. Four push-out specimens and two composite beam specimens were designed and experimentally studied. The structural behavior and failure mechanism of the composite folded dowel shear connection were investigated. The concrete failure was observed in both push-out and flexural tests, and the folded steel dowels were capable of yielding development. It is found that the bearing capacity and shear stiffness of the specimens with denser spacing dowels were higher than that of specimens with sparser dowels, but the ductility and deformation performance of the specimens with denser spacing dowels were lower than those with sparser dowels. By means of the finite element model simulation, the influence of strength and thickness of concrete slab, strength, thickness and folded angle of steel dowel on the mechanical properties of folded dowel shear connection were analysed. The folded angle could be determined as 20° because of the larger actual effective shear area and bearing capacity. Based on the bearing capacity analysis in terms of the three likely failure modes, such as steel failure, concrete shear failure and concrete pry-out, calculation formula of the shear bearing capacity of the folded dowel shear connection was put forward and verified. The calculated results by the proposed formula were in good agreement with the test results. For the composite beams, the calculated bending moments derived from the transformed section and the plasticity section methods were also in good agreement with the test values. It is suggested that the shear connection degree should be greater than 1 to enable a full composite beam.

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“…During construction, the transversal reinforcement is easy to install and put into the designated position. Moreover, its bearing capacity is better than the PBL shear connectors, and exhibiting good anti-fatigue performance as well 10 – 13 . Researchers have carried out a series of static tests and theoretical studies on PZ shape composite dowel shear connectors in recent years.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the bearing capacity of PZ shape composite dowel shear connectors with elliptical holes

Huang

Jun-long

Kong

et al. 2022

Sci Rep

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The push-out test was carried out in order to study the shear performance of perfobond ribs (PBL) and puzzle (PZ) shape composite dowel shear connectors which are used in corrugated steel–concrete composite bridge decks. By considering the influencing factors of transversal reinforcement, elliptical holes and bonding friction forces, eight specimens were designed and prepared. The load–slip curves were obtained, and the static mechanical properties, including bearing capacity, slip, shear stiffness, and ductility factor, were analyzed. The formula of bearing capacity and load–slip curve were proposed. The results showed a clear deformation of the transversal reinforcement of both the two types of shear connectors. The dominating failure mode of both the shear connectors was the double plane shearing of the concrete dowel. The load–slip curves of the two types of shear connectors followed the same trend. The PZ shape composite dowel performed better in ultimate bearing capacity, ductility, and shear stiffness than the PBL shear connector. Elliptical holes in a PZ shape composite dowel significantly increased the ultimate bearing capacity. The shear stiffness increased with transversal reinforcement and reduced with elliptical holes. For PBL shear connectors, the strain change in the C1 area near the loading point was most apparent. While, the A1 and B1 areas were stress concentration locations for PZ shape composite dowel shear connectors. The two formulas were in good agreement with the test results.

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Composite dowels as load introduction devices in concrete-filled steel tubular columns

Cited by 11 publications

References 25 publications

Shear Capacity of Channel Shear Connectors Applied in Composite Slabs with Profiled Steel Decking

Shear Capacity of Channel Shear Connectors Applied in Composite Slabs with Profiled Steel Decking

Experimental and numerical study on structural behavior of folded dowel shear connection

Experimental study on the bearing capacity of PZ shape composite dowel shear connectors with elliptical holes

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