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Modified steel bar model incorporating bond-slip for seismic assessment of concrete structures / Franco Braga in Journal of structural engineering, Vol. 138 N° 11 (Novembre 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 11 (Novembre 2012) . - pp. 1342-1350 Titre : Modified steel bar model incorporating bond-slip for seismic assessment of concrete structures Type de document : texte imprimé Auteurs : Franco Braga, Auteur ; Rosario Gigliotti, Auteur ; Michelangelo Laterza, Auteur Année de publication : 2013 Article en page(s) : pp. 1342-1350 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Reinforced  concrete  Bond  Slip  Modeling  Nonlinear  analysis  Existing  buildings Résumé : This paper presents a simplified model for describing the response of a longitudinal bar embedded in concrete, taking into account the bond-slip phenomenon. The model is developed by assuming a linear bond-slip field along the bar anchorage length and provides a simplified stress-strain relationship to assign to the longitudinal reinforcement. The analytical approach adopted makes the proposed model very convenient from a computational standpoint because, unlike many other refined models, it does not require a multilevel iterative process. Moreover, the assumptions made are particularly appropriate for modeling bond-slip of smooth bars generally used in older reinforced concrete buildings. The implementation strategy of the proposed bond-slip model in general-purpose nonlinear structural analysis software and comparisons with experimental results are discussed in a companion paper. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000587 [article] Modified steel bar model incorporating bond-slip for seismic assessment of concrete structures [texte imprimé] / Franco Braga, Auteur ; Rosario Gigliotti, Auteur ; Michelangelo Laterza, Auteur . - 2013 . - pp. 1342-1350. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 11 (Novembre 2012) . - pp. 1342-1350 Mots-clés : Reinforced  concrete  Bond  Slip  Modeling  Nonlinear  analysis  Existing  buildings Résumé : This paper presents a simplified model for describing the response of a longitudinal bar embedded in concrete, taking into account the bond-slip phenomenon. The model is developed by assuming a linear bond-slip field along the bar anchorage length and provides a simplified stress-strain relationship to assign to the longitudinal reinforcement. The analytical approach adopted makes the proposed model very convenient from a computational standpoint because, unlike many other refined models, it does not require a multilevel iterative process. Moreover, the assumptions made are particularly appropriate for modeling bond-slip of smooth bars generally used in older reinforced concrete buildings. The implementation strategy of the proposed bond-slip model in general-purpose nonlinear structural analysis software and comparisons with experimental results are discussed in a companion paper. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000587

Validation of a modified steel bar model incorporating bond-slip for seismic assessment of concrete structures / Michele D’Amato in Journal of structural engineering, Vol. 138 N° 11 (Novembre 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 11 (Novembre 2012) . - pp. 1351-1360 Titre : Validation of a modified steel bar model incorporating bond-slip for seismic assessment of concrete structures Type de document : texte imprimé Auteurs : Michele D’Amato, Auteur ; Franco Braga, Auteur ; Rosario Gigliotti, Auteur Année de publication : 2013 Article en page(s) : pp. 1351-1360 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Reinforced  concrete  Bond  Slip  Modeling  Nonlinear  analysis  Existing  buildings Résumé : In this paper the implementation and validation of a modified steel bar model including bond-slip of longitudinal bars that was proposed in a companion paper is discussed. The model is developed on the key assumption of linear slip field along the steel bar with different configurations at the ends of the bar. The simplified model is capable of predicting the axial slip displacement with suitable accuracy compared with a refined model but with considerably fewer computational steps. The proposed model avoids nested iterations in the context of fiber model discretization of a section that requires the representation of all actions in terms of stress and strain. The model is applied to two component tests—one with poor and another with improved reinforcing detailing. Findings from the simulations indicate that the proposed model is more suitable for use in connections with poor detailing and pronounced slip in the plastic hinge zones. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000588 [article] Validation of a modified steel bar model incorporating bond-slip for seismic assessment of concrete structures [texte imprimé] / Michele D’Amato, Auteur ; Franco Braga, Auteur ; Rosario Gigliotti, Auteur . - 2013 . - pp. 1351-1360. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 11 (Novembre 2012) . - pp. 1351-1360 Mots-clés : Reinforced  concrete  Bond  Slip  Modeling  Nonlinear  analysis  Existing  buildings Résumé : In this paper the implementation and validation of a modified steel bar model including bond-slip of longitudinal bars that was proposed in a companion paper is discussed. The model is developed on the key assumption of linear slip field along the steel bar with different configurations at the ends of the bar. The simplified model is capable of predicting the axial slip displacement with suitable accuracy compared with a refined model but with considerably fewer computational steps. The proposed model avoids nested iterations in the context of fiber model discretization of a section that requires the representation of all actions in terms of stress and strain. The model is applied to two component tests—one with poor and another with improved reinforcing detailing. Findings from the simulations indicate that the proposed model is more suitable for use in connections with poor detailing and pronounced slip in the plastic hinge zones. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000588