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Analysis of the lateral thrust in bolted steel buckling-restrained braces. I / Francesco Genna in Journal of structural engineering, Vol. 138 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 10 (Octobre 2012) . - pp.1231–1243. Titre : Analysis of the lateral thrust in bolted steel buckling-restrained braces. I : Experimental and numerical results Type de document : texte imprimé Auteurs : Francesco Genna, Auteur ; Piero Gelfi, Auteur Année de publication : 2013 Article en page(s) : pp.1231–1243. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Buckling-restrained  braces  Experiments  Nonlinear  finite-element  analysis Résumé : This work presents an experimental and numerical analysis of the lateral forces exerted by the inner core of a buckling-restrained brace (BRB) when, after buckling in compression, it arrives into contact with the external restraining case, from which it is separated by a small empty gap. Experiments are carried out on reduced-scale specimens to measure the thrust acting on the containment struts. Refined, nonlinear two-dimensional (2D) FEM models are adopted to obtain numerical estimates of the thrust. The results show (1) the capability of 2D, plane stress FEM models to correctly reproduce the cyclic behavior of the studied BRBs, and (2) the difficulty in accurately measuring/computing the thrust associated to a given axial load/displacement. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000558 [article] Analysis of the lateral thrust in bolted steel buckling-restrained braces. I : Experimental and numerical results [texte imprimé] / Francesco Genna, Auteur ; Piero Gelfi, Auteur . - 2013 . - pp.1231–1243. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 10 (Octobre 2012) . - pp.1231–1243. Mots-clés : Buckling-restrained  braces  Experiments  Nonlinear  finite-element  analysis Résumé : This work presents an experimental and numerical analysis of the lateral forces exerted by the inner core of a buckling-restrained brace (BRB) when, after buckling in compression, it arrives into contact with the external restraining case, from which it is separated by a small empty gap. Experiments are carried out on reduced-scale specimens to measure the thrust acting on the containment struts. Refined, nonlinear two-dimensional (2D) FEM models are adopted to obtain numerical estimates of the thrust. The results show (1) the capability of 2D, plane stress FEM models to correctly reproduce the cyclic behavior of the studied BRBs, and (2) the difficulty in accurately measuring/computing the thrust associated to a given axial load/displacement. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000558

Analysis of the lateral thrust in bolted steel buckling-restrained braces. II / Francesco Genna in Journal of structural engineering, Vol. 138 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 10 (Octobre 2012) . - pp.1244–1254. Titre : Analysis of the lateral thrust in bolted steel buckling-restrained braces. II : Engineering analytical estimates Type de document : texte imprimé Auteurs : Francesco Genna, Auteur ; Piero Gelfi, Auteur Année de publication : 2013 Article en page(s) : pp.1244–1254. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Buckling-restrained  braces  Constrained  buckling  Contact Résumé : Part I of this work was concerned with the experimental and numerical analysis of the lateral force, or thrust, exerted by the inner core of a buckling-restrained brace (BRB) when, after buckling in compression, it arrives into contact with the external retaining case. As Part II of that study, this paper considers the case of a steel-bolted BRB, with an empty gap between core and containment struts, to attempt the derivation of engineering analytical expressions for such a thrust. It is found that the relationship between applied axial force and buckled wavelength does not obey Euler’s formula. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000564 [article] Analysis of the lateral thrust in bolted steel buckling-restrained braces. II : Engineering analytical estimates [texte imprimé] / Francesco Genna, Auteur ; Piero Gelfi, Auteur . - 2013 . - pp.1244–1254. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 10 (Octobre 2012) . - pp.1244–1254. Mots-clés : Buckling-restrained  braces  Constrained  buckling  Contact Résumé : Part I of this work was concerned with the experimental and numerical analysis of the lateral force, or thrust, exerted by the inner core of a buckling-restrained brace (BRB) when, after buckling in compression, it arrives into contact with the external retaining case. As Part II of that study, this paper considers the case of a steel-bolted BRB, with an empty gap between core and containment struts, to attempt the derivation of engineering analytical expressions for such a thrust. It is found that the relationship between applied axial force and buckled wavelength does not obey Euler’s formula. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000564