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Impact of fibre orientation on tensile, bending and shear behaviors of a steel fibre reinforced concrete

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Abstract

Fibre orientation and density are known to have a significant influence on steel fibre reinforced concretes (SFRC) mechanical properties. In practice, parameters such as fresh state properties, restriction to concrete flowability and placing methods are likely to induce different fibre orientations in characterisation specimens and structural components. This difference in fibre orientation can impact the mechanical behavior of the structural component and therefore provide an unsafe design if not considered. This project consisted to produce a large SFRC slab, extract specimens with different fibre orientations, and submit specimens to tensile, bending and shear tests to evaluate the impact of fibre orientation and density on mechanical and post-peak strengths. Test results have shown that tensile and bending behaviors are mainly influenced by the fibre orientation, while the shear behavior is mainly impacted by fibre density. Test results were processed to allow comparison between tensile and bending tests. Linear correlations between tensile residual stresses and fibre orientation where found, linear or power type correlations according to bending residual stresses, as well as linear correlations between shear stresses and fibre density.

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Acknowledgements

The authors are grateful to Holcim, Bekaert and Euclid for their material donations.

Funding

This project was financially supported by an industrial research project funded by the Natural Sciences and Engineering Research Council of Canada (Grant No CRD 419432-11), City of Montreal, Jacques Cartier and Champlain Bridges Inc., Béton Brunet and Euclid.

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Authors and Affiliations

  1. Department of Civil, Geological and Mining Engineering, Research Center on Concrete Infrastructures (CRIB), Polytechnique Montreal, Montreal, H3C 3A7, Canada

    Julien Doyon-Barbant & Jean-Philippe Charron

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  1. Julien Doyon-Barbant
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  2. Jean-Philippe Charron
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Correspondence to Jean-Philippe Charron.

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Doyon-Barbant, J., Charron, JP. Impact of fibre orientation on tensile, bending and shear behaviors of a steel fibre reinforced concrete. Mater Struct 51, 157 (2018). https://doi.org/10.1617/s11527-018-1282-0

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