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Verification of the improved constitutive tensile model for fibre reinforced concrete

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Abstract

Recently, new constitutive tensile models for describing the post-cracking behaviour of fibre reinforced concrete for different performance classes were developed by the author(s). The models are based on test data on notched beams with macro fibres, including one type of glass fibres and two polypropylene fibres. Nowadays, a wide range of macro fibres for reinforcing concrete mixtures is available. The objective of this paper is thus to examine whether the newly developed models are applicable for other FRC mixtures. For this purpose, the experimental results of 236 three-point bending tests on notched beams, obtained from Vrijdaghs et al. and the international company Bekaert, are compared with the model predictions. The results indicate that the proposed model for performance class a & b and class c exhibit a higher accuracy at CMOD1 than the model in MC10 and EC2 (next version). However, further optimization is required at CMOD3 for the model of performance class a & b and class d. A strong correlation is also found between the experimental fR1-values, as well as the fR3-values, and the predicted compression zone height of the beam cross-section at midspan by use of those new constitutive models. Moreover, this paper also proposes a modification to the model of Oettel et al. for better estimating the residual flexural tensile strength of FRC mixtures with 4D Dramix fibres.

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Author notes

  1. Rutger Vrijdaghs and Hans Pauwels have contributed equally to this work.

Authors and Affiliations

  1. Department of Civil Engineering, KU Leuven Campus Brugge, Spoorwegstraat 12, 8200, Brugge, Belgium

    Brecht Vandevyvere & Jiabin Li

  2. Department of Civil Engineering, KU Leuven, Kasteelpark Arenberg 40, 3001, Louvain, Belgium

    Lucie Vandewalle

  3. Laboratory Structures and Building Systems, Buildwise, Avenue Pierre Holoffe 21, 1342, Limelette, Belgium

    Rutger Vrijdaghs

  4. Concrete Expertise Center, NV Bekaert SA, Oude Heerweg 5, 8540, Deerlijk, Belgium

    Hans Pauwels

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  1. Brecht Vandevyvere
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Correspondence to Brecht Vandevyvere or Jiabin Li.

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The original online version of this article was revised: In Table 3, fist column the second occurrence of 'FRC class a, b' has been changed to 'FRC class c' and the third occurrence of 'FRC class a, b' has been changed to 'FRC class d'

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Vandevyvere, B., Vandewalle, L., Vrijdaghs, R. et al. Verification of the improved constitutive tensile model for fibre reinforced concrete. Mater Struct 57, 57 (2024). https://doi.org/10.1617/s11527-024-02336-8

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