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New model for the analysis of size-scale effects on the ductility of reinforced concrete elements in bending / A. Carpinteri in Journal of engineering mechanics, Vol. 135 N°3 (Mars 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N°3 (Mars 2009) . - pp. 221-229 Titre : New model for the analysis of size-scale effects on the ductility of reinforced concrete elements in bending Type de document : texte imprimé Auteurs : A. Carpinteri, Auteur ; M. Corrado, Auteur ; M. Paggi, Auteur Article en page(s) : pp. 221-229 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Reinforced  concrete  Ductility  Size  effect  Crushing  Nonlinear  analysis  Finite  element  method  Bending. Résumé : The well-known cohesive crack model describes strain localization with a softening stress variation in concrete members subjected to tension. An analogous behavior is also observed in compression, when strain localization takes place in a damaged zone and the stress reaches the compression strength with surface energy dissipation. In the present paper, we propose the new concept of overlapping crack model, which is analogous to the cohesive one and permits us to simulate material interpenetration due to crushing. The two aforementioned elementary models are merged into a more complex algorithm able to describe both cracking and crushing growths during loading processes in reinforced concrete members. A numerical procedure based on elastic coefficients is developed, taking into account the proposed constitutive laws in tension and compression. With this algorithm, it is possible to effectively capture the flexural behavior of reinforced concrete beams by varying the reinforcement percentage and/or the beam depth. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] New model for the analysis of size-scale effects on the ductility of reinforced concrete elements in bending [texte imprimé] / A. Carpinteri, Auteur ; M. Corrado, Auteur ; M. Paggi, Auteur . - pp. 221-229. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N°3 (Mars 2009) . - pp. 221-229 Mots-clés : Reinforced  concrete  Ductility  Size  effect  Crushing  Nonlinear  analysis  Finite  element  method  Bending. Résumé : The well-known cohesive crack model describes strain localization with a softening stress variation in concrete members subjected to tension. An analogous behavior is also observed in compression, when strain localization takes place in a damaged zone and the stress reaches the compression strength with surface energy dissipation. In the present paper, we propose the new concept of overlapping crack model, which is analogous to the cohesive one and permits us to simulate material interpenetration due to crushing. The two aforementioned elementary models are merged into a more complex algorithm able to describe both cracking and crushing growths during loading processes in reinforced concrete members. A numerical procedure based on elastic coefficients is developed, taking into account the proposed constitutive laws in tension and compression. With this algorithm, it is possible to effectively capture the flexural behavior of reinforced concrete beams by varying the reinforcement percentage and/or the beam depth. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]