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Development of a reliability framework for the use of advanced nonlinear finite elements in the design of concrete structures / Mehdi Ben Ftima in Journal of structural engineering, Vol. 138 N° 8 (Août 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.1054–1064. Titre : Development of a reliability framework for the use of advanced nonlinear finite elements in the design of concrete structures Type de document : texte imprimé Auteurs : Mehdi Ben Ftima, Auteur ; Bruno Massicotte, Auteur Année de publication : 2012 Article en page(s) : pp.1054–1064. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Nonlinear  analysis  Finite  element  Reinforced  concrete  Global  resistance  factor  Limit  state  design  Probability  of  failure Résumé : This paper proposes a methodology that uses advanced nonlinear finite-element analysis for determining a global resistance factor for the design of reinforced concrete structures. It introduces a new reliability approach that takes into account the uncertainties of the material properties and the performance of the concrete model used in the calculations. In the proposed approach, the global resistance factor is computed following a procedure in which the coefficient of variation of the calculated resistance is estimated using Rosenblueth’s point-estimate method. The robustness and simplicity of the method are demonstrated through validation examples. It is seen that good approximations of the resistance factor can be achieved for the case of normal or quasi-normal distributions of the resistance. Estimation of the coefficient of variation of the prediction error is then performed for a given reinforced concrete element and a nonlinear finite-element package. The accuracy of the selected software is considered through its ability to predict the behavior of a set of benchmarks selected for the target design structure, going from the material level to the structural level. The suggested methodology is well suited for structural engineers having access to nonlinear deterministic finite-element packages with concrete models. It proposes a reliability format that focuses on the variability on the resistance side while using the concept of critical load paths on the load side, which is compatible with the philosophy of the existing design codes ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000538 [article] Development of a reliability framework for the use of advanced nonlinear finite elements in the design of concrete structures [texte imprimé] / Mehdi Ben Ftima, Auteur ; Bruno Massicotte, Auteur . - 2012 . - pp.1054–1064. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.1054–1064. Mots-clés : Nonlinear  analysis  Finite  element  Reinforced  concrete  Global  resistance  factor  Limit  state  design  Probability  of  failure Résumé : This paper proposes a methodology that uses advanced nonlinear finite-element analysis for determining a global resistance factor for the design of reinforced concrete structures. It introduces a new reliability approach that takes into account the uncertainties of the material properties and the performance of the concrete model used in the calculations. In the proposed approach, the global resistance factor is computed following a procedure in which the coefficient of variation of the calculated resistance is estimated using Rosenblueth’s point-estimate method. The robustness and simplicity of the method are demonstrated through validation examples. It is seen that good approximations of the resistance factor can be achieved for the case of normal or quasi-normal distributions of the resistance. Estimation of the coefficient of variation of the prediction error is then performed for a given reinforced concrete element and a nonlinear finite-element package. The accuracy of the selected software is considered through its ability to predict the behavior of a set of benchmarks selected for the target design structure, going from the material level to the structural level. The suggested methodology is well suited for structural engineers having access to nonlinear deterministic finite-element packages with concrete models. It proposes a reliability format that focuses on the variability on the resistance side while using the concept of critical load paths on the load side, which is compatible with the philosophy of the existing design codes ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000538