Modelling the influence of the fibre structure on the structural behaviour of flowable fibre-reinforced concrete

Journal article (2016)

Authors

E. V. Sarmiento Norwegian University of Science and Technology (NTNU)
M.A.N. Hendriks Norwegian University of Science and Technology (NTNU), Applied Mechanics - CEG
M. R. Geiker Norwegian University of Science and Technology (NTNU)
T. Kanstad Norwegian University of Science and Technology (NTNU)
Research Group
Applied Mechanics (CEG) (TU Delft)
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Published Date

01-10-2016

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Applied Mechanics

Abstract

This paper presents a modelling approach for fibre-reinforced concrete elements in which the fibre structure is taken into account in simulating the mechanical behaviour. The fibre structure is discretized in volumes and two fibre parameters are defined for each discrete volume: the dominant fibre orientation and the fibre volume fraction. These parameters are incorporated in a numerical model that uses a single-phase material definition dependent on the fibre parameters. The first part of this paper describes the methodology and constitutive modelling. The second part addresses the simulation of two beams that exhibited large differences in bending because of uneven fibre distribution. Data on the fibre structure was obtained using Computed Tomography scanning. The modelling approach captured the large difference in the flexural response of the two beams and provided an adequate prediction of the location and propagation of the critical cracks.