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Tension stiffening in prestressed concrete beams using moment-curvature relationship / Shobeir Pirayeh Gar 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.1075–1078. Titre : Tension stiffening in prestressed concrete beams using moment-curvature relationship Type de document : texte imprimé Auteurs : Shobeir Pirayeh Gar, Auteur ; Hurlebaus, Stefan, Auteur Année de publication : 2012 Article en page(s) : pp.1075–1078. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Tension  stiffening  Moment-curvature  Prestressing  Cracking  Serviceability  Concrete  beams Résumé : Tension stiffening phenomenon plays a vital role in serviceability of nonprestressed reinforced concrete (RC) beams as it enhances the postcracking flexural stiffness leading to a smaller deflection, accordingly. However, this paper’s findings indicate that in contrast to RC sections, the effect of tension stiffening is negligible for fully prestressed concrete sections. This study presents a closed form equation of moment-curvature for prestressed concrete sections under service load, where the tensile strength of the concrete is taken into account. This equation is verified by experimental test data and numerical analysis, thereby proving the negligible effect of tension stiffening on fully prestressed concrete sections. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000534 [article] Tension stiffening in prestressed concrete beams using moment-curvature relationship [texte imprimé] / Shobeir Pirayeh Gar, Auteur ; Hurlebaus, Stefan, Auteur . - 2012 . - pp.1075–1078. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 8 (Août 2012) . - pp.1075–1078. Mots-clés : Tension  stiffening  Moment-curvature  Prestressing  Cracking  Serviceability  Concrete  beams Résumé : Tension stiffening phenomenon plays a vital role in serviceability of nonprestressed reinforced concrete (RC) beams as it enhances the postcracking flexural stiffness leading to a smaller deflection, accordingly. However, this paper’s findings indicate that in contrast to RC sections, the effect of tension stiffening is negligible for fully prestressed concrete sections. This study presents a closed form equation of moment-curvature for prestressed concrete sections under service load, where the tensile strength of the concrete is taken into account. This equation is verified by experimental test data and numerical analysis, thereby proving the negligible effect of tension stiffening on fully prestressed concrete sections. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000534