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Creep-effect on mechanical behavior of concrete confined by FRP under axial compression / Wang, Yuanfeng in Journal of engineering mechanics, Vol. 135 N° 11 (Novembre 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N° 11 (Novembre 2009) . - pp. 1315-1322 Titre : Creep-effect on mechanical behavior of concrete confined by FRP under axial compression Type de document : texte imprimé Auteurs : Wang, Yuanfeng, Auteur ; Zhang, Dianjie, Auteur Article en page(s) : pp. 1315-1322 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Creep  Concrete  Material  properties  Compression  Fiber  reinforced  polymers  Mechanical  properties Résumé : Despite many successes in concrete creep studies, its effect on the mechanical behavior of concrete members is far from a thorough case-specific understanding. For the members that have been subjected to a long-term load, the classical stress-strain models describing the short-term behavior of either confined or unconfined concrete are unsuitable. In order to investigate this creep-effect, an experiment on eight concrete cylindrical columns confined by fiber-reinforced polymer (FRP) is carried out. Based on the theory of plasticity for concrete, a constitutive model that takes into account the effect of creep on mechanical behavior of concrete confined by FRP is presented. In the model, the creep law inspired in the microprestress-solidification theory is generalized to triaxial stress condition for the calculation of the creep of the concrete columns confined by FRP. The predictions of the model agree well with the experimental results. The present study indicates that the creep increases the elastic modulus, slightly decreases the compressive strength, and degrades the deformation capability of the concrete confined by FRP. DEWEY : 660 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&ONLINE=YES&s [...] [article] Creep-effect on mechanical behavior of concrete confined by FRP under axial compression [texte imprimé] / Wang, Yuanfeng, Auteur ; Zhang, Dianjie, Auteur . - pp. 1315-1322. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N° 11 (Novembre 2009) . - pp. 1315-1322 Mots-clés : Creep  Concrete  Material  properties  Compression  Fiber  reinforced  polymers  Mechanical  properties Résumé : Despite many successes in concrete creep studies, its effect on the mechanical behavior of concrete members is far from a thorough case-specific understanding. For the members that have been subjected to a long-term load, the classical stress-strain models describing the short-term behavior of either confined or unconfined concrete are unsuitable. In order to investigate this creep-effect, an experiment on eight concrete cylindrical columns confined by fiber-reinforced polymer (FRP) is carried out. Based on the theory of plasticity for concrete, a constitutive model that takes into account the effect of creep on mechanical behavior of concrete confined by FRP is presented. In the model, the creep law inspired in the microprestress-solidification theory is generalized to triaxial stress condition for the calculation of the creep of the concrete columns confined by FRP. The predictions of the model agree well with the experimental results. The present study indicates that the creep increases the elastic modulus, slightly decreases the compressive strength, and degrades the deformation capability of the concrete confined by FRP. DEWEY : 660 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&ONLINE=YES&s [...]