Application of FRC constitutive models to modelling of slabs
journal contributionposted on 2018-03-21, 09:08 authored by Ana Blanco-AlvarezAna Blanco-Alvarez, Sergio Pialarissi-CavalaroSergio Pialarissi-Cavalaro, Albert De la Fuente, S. Grunewald, C.B.M. Blom, J.C. Walraven
Fibre reinforcement technology has advanced significantly in recent years and, as a result, expanded into different applications. In particular, steel fibre-reinforced concrete has been successfully employed in flat slabs of several buildings in Europe with fibres as the only reinforcement. However, design methods for fibre-reinforced concrete (FRC) structures do not consider differences that may result from material characterisation tests that are not representative of the structural behaviour and fibre orientation of real-scale elements. In this regard, this paper presents a numerical study in which two constitutive models for FRC based on the bending test are applied to estimate the flexural behaviour of full-scale slabs of different dimensions. Likewise, a parametric study is conducted to analyse how the parameters of these constitutive models affect the flexural response of the slabs, and a numerical fit of the experimental data is performed. Finite element simulations using the constitutive models overestimate the experimental results. The parametric study also reveals that the parameter σ 2 (stress after cracking) has a particularly importance influence on the response. Furthermore, enhanced sectional behaviour of the slabs was observed as their width was increased.
The authors of this article wish to express their gratitude for the economic support received through research project BIA2010-17478 (Construction processes by means of fibre-reinforced concretes). The first author acknowledges the grant FI provided by the Comissionat per a Universitats del DIUE de la Generalitat de Catalunya i del Fons Social Europeu and the support of the Collegi d’Enginyers de Camins, Canals i Ports de Catalunya.
- Architecture, Building and Civil Engineering