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Titre: A practical method to estimate crack openings in concrete structures
Auteur(s): MATALLAH, Mohamed
Mots-clés: Isolated zygotic embryo Germination Proliferation Micropropagat ion Culture medium Pistacia vera L
Date de publication: 14-mar-2013
Collection/Numéro: INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS;Int. J. Numer Anal. Meth. Geomech. 2010; 34:1615-1633 Published online 15 January 2010 in Wiley Online Library (wileyonlinelibrary.com)
Résumé: numerical modelling of concrete cracking requires robust models able to describe opening and propaga-tion of cracks. Structural concrete codes provide practical relations to describe crack openings. However, these empirical methods were developed for specific structures and cannot be used for general appli-cations. Here, a continuous modelling approach based on damage mechanics is used to compute crack openings in a tie-beam concrete structure. We propose a post-processing method to extract crack openings from a continuum damage finite element computation. This method can be applied to all continuum damage/plasticity models. The tiebeam concrete is characterized by a weak stress gradient; this aspect complicates predictions of crack positions and number. A stochastic method is used to take into account the spatial variability in concrete properties and create a spatially correlated random property field. Copyright © 2010 John Wiley & Sons, Ltd.
URI/URL: http://dspace.univ-tlemcen.dz/handle/112/1573
ISSN: DO!: 10.1002/nag.876
Collection(s) :Communications internationales

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