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Shear behaviour of steel fibre reinforced concrete beams

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Abstract

The possibility of substituting traditional transverse reinforcement (stirrups) for steel fibres in precast elements can significantly reduce production costs. In the present paper, the shear behaviour of prestressed elements has been investigated by means of experimental tests on full scale beams. Tests concern beams with conventional as well as steel fibre reinforcement. Experimental results show that the shear behaviour of fibre reinforced concrete beams without conventional reinforcement is similar to, or even better than that of beams with stirrups. When used in beams with stirrups, steel fibres significantly improve their shear strength. A discussion on the contribution of steel fibres on the shear strength is also presented, with reference to the latest RILEM provisions.

Résumé

La possibilité de remplacer des armatures transversales traditionnelles par des fibres d'acier dans des éléments pré-tendus peut apporter des améliorations considérables sur les performances structurales. Dans ce rapport, le comportement en cisaillement des éléments précontraints a été étudié à l'aide de tests expérimentaux sur des poutres à échelle grandeur nature. Les essais portent aussi bien sur des poutres avec armatures traditionnelles que sur des poutres renforcées à l'aide de fibres. Les résultats expérimentaux montrent que les performances des poutres en béton de fibres sans armatures traditionnelles sont similaires, sinon meilleures, à celles des poutres avec armature ordinaire de cisaillement. Lorsqu'elles sont utilisées dans des poutres avec armatures traditionnelles les fibres d'acier améliorent considérablement leur résistance en cisaillement.

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Authors and Affiliations

  1. Department of engineering design and technologies, University of Bergamo, Italy

    A. Meda & G. A. Plizzari

  2. Department of civil engineering, University of Brescia, Italy

    F. Minelli & P. Riva

Authors
  1. A. Meda
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  2. F. Minelli
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  3. G. A. Plizzari
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  4. P. Riva
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Meda, A., Minelli, F., Plizzari, G.A. et al. Shear behaviour of steel fibre reinforced concrete beams. Mat. Struct. 38, 343–351 (2005). https://doi.org/10.1007/BF02479300

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  • DOI: https://doi.org/10.1007/BF02479300

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