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Title: Size effect on post-cracking strength of high performance fibre-reinforced concrete
Authors: Galeote, Eduardo
Blanco, Ana
De la Fuente, Albert
Goodier, Chris I.
Austin, Simon A.
Keywords: HPFRC
Size effect
Bending test
Inverse analysis
Constitutive model
Issue Date: 2017
Publisher: Springer
Citation: GALEOTE, E. ...et al., 2017. Size effect on post-cracking strength of high performance fibre-reinforced concrete. IN: Hordijk, D.A. and Lukovic, M. (eds.) High Tech Concrete: Where Technology and Engineering Meet: Proceedings of the 2017 fib Symposium, held in Maastricht, The Netherlands, June 12-14, 2017, New York: Springer, pp. 182-190.
Abstract: © Springer International Publishing AG 2018. The size effect is a well-known phenomenon in the design of reinforced concrete structures. Although it has been studied extensively for conventional concrete with or without traditional reinforcement, its influence on the post-cracking behaviour of fibre-reinforced composites is scarcely reported in literature. This is particularly true in the case of high performance fibre-reinforced concrete (HPFRC), which allows the design of very thin elements and whose behaviour may be highly influenced by their size. The aim of this research was to evaluate the influence of the size of HPFRC beams on the mechanical performance at a cross-sectional level. An experimental program involving three-point bending tests of HPFRC on beams of dimensions 40 × 40 × 160, 100 × 100 × 400 and 150 × 150 × 600 mm was conducted. Three steel fibre contents were investigated: 90, 140 and 190 kg/m 3 . These bending tests were also simulated via a sectional analysis model, taking as a reference the constitutive law described in the fib Model Code for Concrete Structures 2010. The results suggest that the values of stress in the constitutive model should depend upon the cross-sectional size of the beam. This is reflected when adjusting the parameters of the MC2010 to fit the experimental values, resulting in a coefficient of determination above 0.88 when comparing the ratio between these two parameters and the size of the cross section.
Description: This is a pre-copyedited version of a contribution published in Hordijk, D.A. and Lukovic, M. (eds.) High Tech Concrete: Where Technology and Engineering Meet: Proceedings of the 2017 fib Symposium published by Springer. The definitive authenticated version is available online via https://doi.org/10.1007/978-3-319-59471-2-23
Sponsor: The first author also acknowledges the Spanish Ministry of Education, Culture and Sport for providing support through the grant FPU.
Version: Accepted for publication
DOI: 10.1007/978-3-319-59471-2-23
URI: https://dspace.lboro.ac.uk/2134/26669
Publisher Link: https://doi.org/10.1007/978-3-319-59471-2-23
ISBN: 9783319594705
Appears in Collections:Conference Papers and Presentations (Architecture, Building and Civil Engineering)

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