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Mixed finite element for three-dimensional nonlinear dynamic analysis of rectangular concrete-filled steel tube beam-columns / Cenk Tort in Journal of engineering mechanics, Vol. 136 N° 11 (Novembre 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1329-1353 Titre : Mixed finite element for three-dimensional nonlinear dynamic analysis of rectangular concrete-filled steel tube beam-columns Type de document : texte imprimé Auteurs : Cenk Tort, Auteur ; Jerome F. Hajjar, Auteur Année de publication : 2011 Article en page(s) : pp.1329-1353 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Beams  Finite  element  method  Slip  Beam  columns  Tubes  Dynamic  analysis. Résumé : A beam finite-element formulation following Euler-Bernoulli beam theory is presented for geometrically and materially nonlinear analysis of rectangular concrete-filled steel tube (RCFT) beam-columns. The formulation is geared for conducting transient dynamic analysis of composite steel/concrete frame structures. The element stiffness and internal forces were derived through adopting a mixed finite-element approach based on the Hellinger-Reissner variational principle. The load transfer between the steel and concrete constitutive materials was provided through steel and concrete interface via friction and interlocking. Six extra translational degrees-of-freedom (DOFs) were added to the conventional 12 DOF beam element to quantify the differential displacement between the two media. The formulation was verified for a range of geometrically nonlinear test problems and geometrically and materially nonlinear RCFT experimental test specimens from the literature. Strong correlation and convergence characteristics were achieved compared to the published results. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1329_s1?isAuthorized=no [article] Mixed finite element for three-dimensional nonlinear dynamic analysis of rectangular concrete-filled steel tube beam-columns [texte imprimé] / Cenk Tort, Auteur ; Jerome F. Hajjar, Auteur . - 2011 . - pp.1329-1353. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1329-1353 Mots-clés : Beams  Finite  element  method  Slip  Beam  columns  Tubes  Dynamic  analysis. Résumé : A beam finite-element formulation following Euler-Bernoulli beam theory is presented for geometrically and materially nonlinear analysis of rectangular concrete-filled steel tube (RCFT) beam-columns. The formulation is geared for conducting transient dynamic analysis of composite steel/concrete frame structures. The element stiffness and internal forces were derived through adopting a mixed finite-element approach based on the Hellinger-Reissner variational principle. The load transfer between the steel and concrete constitutive materials was provided through steel and concrete interface via friction and interlocking. Six extra translational degrees-of-freedom (DOFs) were added to the conventional 12 DOF beam element to quantify the differential displacement between the two media. The formulation was verified for a range of geometrically nonlinear test problems and geometrically and materially nonlinear RCFT experimental test specimens from the literature. Strong correlation and convergence characteristics were achieved compared to the published results. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1329_s1?isAuthorized=no

Mixed finite-element modeling of rectangular concrete-filled steel tube members and frames under static and dynamic loads / Cenk Tort in Journal of structural engineering, Vol. 136 N° 6 (Juin 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 654-664 Titre : Mixed finite-element modeling of rectangular concrete-filled steel tube members and frames under static and dynamic loads Type de document : texte imprimé Auteurs : Cenk Tort, Auteur ; Jerome F. Hajjar, Auteur Année de publication : 2011 Article en page(s) : pp. 654-664 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Beam  finite  element  Mixed  finite  element  formulation  Slip  Composite  Concrete-filled  steel  tube  Cold-formed  steel  Local  buckling  Confined  concrete Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A computational study was conducted to investigate the nonlinear response of composite frames consisting of rectangular concrete-filled steel tube (RCFT) beam-columns and steel framing subjected to static and dynamic loads. Following mixed finite-element principles, a three-dimensional fiber-based beam finite-element model was developed, allowing slip deformation between steel tube and the concrete core. Comprehensive material constitutive relations were developed for the steel tube and the concrete core through examining the experimental results in the literature. The uniaxial stress-based steel and concrete constitutive relations include modeling of the effects of confinement, steel tube local buckling, cycling concrete into both tension and compression, cyclic softening, and other key cyclic phenomena observed for steel and concrete in RCFT members. The finite-element model was verified against a wide range of experimental tests under monotonic, quasistatic cyclic, and pseudodynamic loading conditions. The mixed finite-element model produced strong correlations with experimental results to simulate the nonlinear response of RCFT members with excellent computational efficiency. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p654_s1?isAuthorized=no [article] Mixed finite-element modeling of rectangular concrete-filled steel tube members and frames under static and dynamic loads [texte imprimé] / Cenk Tort, Auteur ; Jerome F. Hajjar, Auteur . - 2011 . - pp. 654-664. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 654-664 Mots-clés : Beam  finite  element  Mixed  finite  element  formulation  Slip  Composite  Concrete-filled  steel  tube  Cold-formed  steel  Local  buckling  Confined  concrete Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A computational study was conducted to investigate the nonlinear response of composite frames consisting of rectangular concrete-filled steel tube (RCFT) beam-columns and steel framing subjected to static and dynamic loads. Following mixed finite-element principles, a three-dimensional fiber-based beam finite-element model was developed, allowing slip deformation between steel tube and the concrete core. Comprehensive material constitutive relations were developed for the steel tube and the concrete core through examining the experimental results in the literature. The uniaxial stress-based steel and concrete constitutive relations include modeling of the effects of confinement, steel tube local buckling, cycling concrete into both tension and compression, cyclic softening, and other key cyclic phenomena observed for steel and concrete in RCFT members. The finite-element model was verified against a wide range of experimental tests under monotonic, quasistatic cyclic, and pseudodynamic loading conditions. The mixed finite-element model produced strong correlations with experimental results to simulate the nonlinear response of RCFT members with excellent computational efficiency. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p654_s1?isAuthorized=no