RESEARCH ARTICLE


Influence of Shear Connection Distributions on the Behaviour of Continuous Steel-concrete Composite Beams



Alessandro Zona*, Graziano Leoni, Andrea Dall’Asta
School of Architecture and Design, University of Camerino, Ascoli Piceno, Italy


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Creative Commons License
© 2017 Zona et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Architecture and Design, University of Camerino, Viale della Rimembranza, Ascoli Piceno, 63100 Italy; Tel: +39 0737 404276; Fax +39 0737 404267; E-mail: alessandro.zona@unicam.it


Abstract

Background:

In this work the behaviour of continuous steel-concrete composite beams with different shear connection distributions obtained from two design methods, i.e. Eurocode 4 and a proposed alternative approach, is analysed.

Objective:

For this purpose a finite element model specifically developed for the nonlinear analysis of steel-concrete composite beams is adopted. This finite element model includes material nonlinearity of slab concrete, reinforcement steel, beam steel as well as slab-beam nonlinear partial interaction due to the deformable shear connection. The inclusion of the partial interaction in the composite beam model provides information on the slab-beam interface slip and shear force and enables to model the failure of the shear connectors.

Results and Conclusion:

In this way it is possible to analyse and quantify the effect of shear connector distributions on the global and local response of continuous steel-concrete composite beams, both under service load levels and at collapse. Particular attention is focused on the ductility requirements on the shear connectors when varying the connection design approach and distribution.

Keywords: Composite action, Non-linear analysis, Partial interaction, Shear connectors, Slip demand, Steel-concrete composite beam.