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Size effect on post-cracking strength of high performance fibre-reinforced concrete

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conference contribution
posted on 26.09.2017, 08:40 by Eduardo Galeote, Ana Blanco-AlvarezAna Blanco-Alvarez, Albert De la Fuente, Chris GoodierChris Goodier, Simon Austin
© 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.

Funding

The first author also acknowledges the Spanish Ministry of Education, Culture and Sport for providing support through the grant FPU.

History

School

  • Architecture, Building and Civil Engineering

Published in

2017 fib Symposium High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium

Pages

182 - 190

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.

Publisher

Springer

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2017

Notes

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

ISBN

9783319594705

Language

en

Location

Maastricht, The Netherlands