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Simple plastic model for shear critical SFRC beams / Nino Spinella in Journal of structural engineering, Vol. 136 N° 4 (Avril 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 4 (Avril 2010) . - pp. 390-400 Titre : Simple plastic model for shear critical SFRC beams Type de document : texte imprimé Auteurs : Nino Spinella, Auteur ; Piero Colajanni, Auteur ; Antonino Recupero, Auteur Année de publication : 2010 Article en page(s) : pp. 390-400 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Steel  fiber-reinforced  concrete  Plastic  theory  Design  Shear  critical  beams Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A simple physical model, for prediction of ultimate shear strength of steel fiber-reinforced concrete (SFRC) beams is developed on the basis of a plastic approach originally proposed for reinforced concrete beams without stirrups. It is founded on the hypothesis that cracks can be transformed into yield lines, and thus is know as crack sliding model (CSM). First, the CSM is improved to take into account the shear strength increase for deep beams, due to the arch effect. Then, the effectiveness factors for fibrous concrete under biaxial stresses are evaluated, taking into account the postcracking tensile strength of SFRC and its ability to control slippage along shear cracks. With the aim of providing a handy and fast tool for design of SFRC beams without stirrups, a simplified design model is also derived. Finally, the proposed models are validated by the results of a large set of experimental tests taken from literature. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i4/p390_s1?isAuthorized=no [article] Simple plastic model for shear critical SFRC beams [texte imprimé] / Nino Spinella, Auteur ; Piero Colajanni, Auteur ; Antonino Recupero, Auteur . - 2010 . - pp. 390-400. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 4 (Avril 2010) . - pp. 390-400 Mots-clés : Steel  fiber-reinforced  concrete  Plastic  theory  Design  Shear  critical  beams Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A simple physical model, for prediction of ultimate shear strength of steel fiber-reinforced concrete (SFRC) beams is developed on the basis of a plastic approach originally proposed for reinforced concrete beams without stirrups. It is founded on the hypothesis that cracks can be transformed into yield lines, and thus is know as crack sliding model (CSM). First, the CSM is improved to take into account the shear strength increase for deep beams, due to the arch effect. Then, the effectiveness factors for fibrous concrete under biaxial stresses are evaluated, taking into account the postcracking tensile strength of SFRC and its ability to control slippage along shear cracks. With the aim of providing a handy and fast tool for design of SFRC beams without stirrups, a simplified design model is also derived. Finally, the proposed models are validated by the results of a large set of experimental tests taken from literature. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i4/p390_s1?isAuthorized=no