To read the full version of this content please select one of the options below:

PREDICTION OF THE FAILURE AND SIZE EFFECT IN CONCRETE VIA A BI‐SCALE DAMAGE APPROACH

C. SAOURIDIS (Laboratoire de Mécanique et Technologie, ENS de Cachan/CNRS/Universite Paris 6, 61 Avenue du Président Wilson, 94235 Cachan Cedex, France)
J. MAZARS (Laboratoire de Mécanique et Technologie, ENS de Cachan/CNRS/Universite Paris 6, 61 Avenue du Président Wilson, 94235 Cachan Cedex, France)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 March 1992

Abstract

Simple but also accurate models are needed to predict the failure response of concrete structures. Simplicity involves modelling assumptions while accuracy involves objectivity of both the experimentally identified model parameters and the numerica results. For concrete‐like heterogeneous and brittle materials, the modelling assumptions idealizing the material as a homogeneous continuum with classical linear or non‐linear behaviour, leads to some problems at the identification stage, namely the size effect phenomena. A continuum damage model, representing the non‐linear behaviour due to microcracking, is proposed here for predictive computations of structural responses. A Weibull based theory is used to determine, in a statistical sense, the value of the initial damage threshold. The essential influence of material heterogeneity on the damage evolution, is accounted for with a bi‐scale approach which is based on the idea of the non‐local continuum with local strain. It has already established that the non‐local approaches yield realistic failure predictions and the numerical results are convergent for subsequent mesh refinements. The applications presented here show the ability of the approach to predict the failure response of concrete structures without being obscured by size effect problems.

Keywords

Citation

SAOURIDIS, C. and MAZARS, J. (1992), "PREDICTION OF THE FAILURE AND SIZE EFFECT IN CONCRETE VIA A BI‐SCALE DAMAGE APPROACH", Engineering Computations, Vol. 9 No. 3, pp. 329-344. https://doi.org/10.1108/eb023870

Publisher

:

MCB UP Ltd

Copyright © 1992, MCB UP Limited