Guidance for the design of spliced columns / Ana M. Girao Coelho in Journal of structural engineering, Vol. 138 N° 9 (Septembre 2012)  

Public ISBD [article]  inJournal of structural engineering > Vol. 138 N° 9 (Septembre 2012) . - pp.1079–1088. Titre : Guidance for the design of spliced columns Type de document : texte imprimé Auteurs : Ana M. Girao Coelho, Auteur ; Pedro D. Simao, Auteur ; Frans S. K. Bijlaard, Auteur Année de publication : 2012 Article en page(s) : pp.1079–1088. Note générale : Génie civil Langues : Anglais (eng) Mots-clés : Analytical modeling Buckling Columns Geometrical Imperfections Splices Résumé : Steel columns in sway and nonsway frames that are spliced along their length generally have a lower strength capacity in compression. This load capacity can be further reduced owing to the inevitable presence of small geometrical imperfections in the form of the out-of-straightness of the column and column segment misalignment. The current work examines the buckling behavior of a framed spliced column with initial imperfections and the possibility of a nonuniform cross section. A geometrically nonlinear model accounting for imperfect elastic buckling behavior is formulated using the differential equations of equilibrium. This is followed by a study of the imperfection sensitivity to the linearly evaluated critical load. A discussion on the variation of the load-carrying capacity with the level of imperfections on a practical spliced column is also presented. The findings suggest that a spliced column can be considered equivalent to a prismatic Euler column, with an appropriate effective length, for design purposes. In this context, some implications for design are deduced from the presented analysis. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000546 [article] Guidance for the design of spliced columns [texte imprimé] / Ana M. Girao Coelho, Auteur ; Pedro D. Simao, Auteur ; Frans S. K. Bijlaard, Auteur . - 2012 . - pp.1079–1088. Génie civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 9 (Septembre 2012) . - pp.1079–1088. Mots-clés : Analytical modeling Buckling Columns Geometrical Imperfections Splices Résumé : Steel columns in sway and nonsway frames that are spliced along their length generally have a lower strength capacity in compression. This load capacity can be further reduced owing to the inevitable presence of small geometrical imperfections in the form of the out-of-straightness of the column and column segment misalignment. The current work examines the buckling behavior of a framed spliced column with initial imperfections and the possibility of a nonuniform cross section. A geometrically nonlinear model accounting for imperfect elastic buckling behavior is formulated using the differential equations of equilibrium. This is followed by a study of the imperfection sensitivity to the linearly evaluated critical load. A discussion on the variation of the load-carrying capacity with the level of imperfections on a practical spliced column is also presented. The findings suggest that a spliced column can be considered equivalent to a prismatic Euler column, with an appropriate effective length, for design purposes. In this context, some implications for design are deduced from the presented analysis. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000546

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