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Elastic stiffness comparisons between RBS beams with either flange or web reductions / Yousef Ashrafi in Journal of structural engineering, Vol. 138 N° 7 (Juillet 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 7 (Juillet 2012) . - pp. 961–966 Titre : Elastic stiffness comparisons between RBS beams with either flange or web reductions Type de document : texte imprimé Auteurs : Yousef Ashrafi, Auteur ; Behzad Rafezy, Auteur Année de publication : 2012 Article en page(s) : pp. 961–966 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Beams  Frames  Reduced  section  Elastic  stiffness  Exact  finite  element  Connections  Earthquakes Résumé : This paper compares the elastic stiffness of reduced beam section (RBS) beams with either flange or web reductions. The former has received considerable attention. However, recently the latter has been shown to have superior plastic rotation capacity and energy dissipation characteristics and is generally more amenable to retrofitting strategies. Initially, a closed-form elastic stiffness matrix for a RBS beam with web reduction is derived from first principles. Its performance is then compared with its reduced flange counterpart using data that are available in the literature. The differences between the two approaches are highlighted in a small parametric study. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000429 [article] Elastic stiffness comparisons between RBS beams with either flange or web reductions [texte imprimé] / Yousef Ashrafi, Auteur ; Behzad Rafezy, Auteur . - 2012 . - pp. 961–966. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 7 (Juillet 2012) . - pp. 961–966 Mots-clés : Beams  Frames  Reduced  section  Elastic  stiffness  Exact  finite  element  Connections  Earthquakes Résumé : This paper compares the elastic stiffness of reduced beam section (RBS) beams with either flange or web reductions. The former has received considerable attention. However, recently the latter has been shown to have superior plastic rotation capacity and energy dissipation characteristics and is generally more amenable to retrofitting strategies. Initially, a closed-form elastic stiffness matrix for a RBS beam with web reduction is derived from first principles. Its performance is then compared with its reduced flange counterpart using data that are available in the literature. The differences between the two approaches are highlighted in a small parametric study. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000429