Transfer of shear force in circular reinforced composite dowel: A review

[en] The performance of steel-concrete composite structures is dependent on the effective transmission of shear force at the material interface. Traditional shear connectors, i.e., headed studs, have limitations in shear resistance and fatigue behavior. To overcome these issues, Circular Reinforced Composite Dowel (CRCD) connectors have been developed. CRCDs are created by perforating a steel element, passing a reinforcement bar through the opening, and filling it with concrete. This paper provides a comprehensive review of the mechanical behavior of CRCD connectors, comprising three resistance mechanisms: interfacial bond, concrete dowel action, and traversing rebar resistance. Equations predicting their resistance are analyzed based on 55 experimental datasets. Key findings reveal that doubling the diameter of the traversing rebar can double the resistance of the connector. A 20% increase in connector strength accompanies a doubling of concrete strength. Optimizing bond resistance depends on steel surface treatment and sufficient transverse confinement. In a group of connectors, placing CRCDs in the first layer maximizes stiffness. Furthermore, this review highlights the lack of research on CRCD connectors positioned on H-shaped steel profiles, which could improve stiffness and shear resistance in the load introduction zone of steel-concrete composite columns or foundation piles.

Precision for document type :

Review article

Disciplines :

Civil engineering

Author, co-author :

PAOLETTI, Maxence ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

Schäfer, Markus; Unilu - University of Luxembourg [LU] > Department of Engineering

External co-authors :

Language :

English

Title :

Transfer of shear force in circular reinforced composite dowel: A review

Publication date :

08 August 2024

Journal title :

Structures

eISSN :

2352-0124

Publisher :

Elsevier BV

Volume :

Pages :

106992

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://doi.org/10.1016/j.istruc.2024.106992

FnR Project :

FNR15692883 - Load Introduction For Steel-concrete Composite Columns Using High-performance Materials, 2021 (01/03/2022-28/02/2026) - Maxence Paoletti

Name of the research project :

15692883

Funders :

FNR - Fonds National de la Recherche

Funding number :

15692883

Available on ORBilu :

since 09 August 2024

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