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Dimensional response analysis of bilinear systems subjected to non-pulselike earthquake ground motions / Karavasilis, Theodore L. in Journal of structural engineering, Vol. 137 N° 5 (Mai 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 5 (Mai 2011) . - pp. 600-606 Titre : Dimensional response analysis of bilinear systems subjected to non-pulselike earthquake ground motions Type de document : texte imprimé Auteurs : Karavasilis, Theodore L., Auteur ; Choung-Yeol Seo, Auteur ; Nicos Makris, Auteur Année de publication : 2011 Article en page(s) : pp. 600-606 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Dimensional  analysis  Self-similarity  Inelastic  displacement  Ground  acceleration  Ground  velocity  Mean  period Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The maximum inelastic response of bilinear single-degree-of-freedom (SDOF) systems when subjected to ground motions without distinguishable pulses is revisited with dimensional analysis by identifying timescales and length scales in the time histories of recorded ground motions. The characteristic length scale is used to normalize the peak inelastic displacement of the bilinear system. The paper adopts the mean period of the Fourier transform of the ground motion as an appropriate timescale and examines two different length scales that result from the peak ground acceleration and the peak ground velocity. When the normalized peak inelastic displacement is presented as a function of the normalized strength and normalized yield displacement, the response becomes self-similar, and a clear pattern emerges. Accordingly, the paper proposes two alternative predictive master curves for the response that solely involve the strength and yield displacement of the bilinear SDOF system in association with either the peak ground acceleration or the peak ground velocity, together with the mean period of the Fourier transform of the ground motion. The regression coefficients that control the shape of the predictive master curves are based on 484 ground motions recorded at rock and stiff soil sites and are applicable to bilinear SDOF systems with a postyield stiffness ratio equal to 2% and an inherent viscous damping ratio equal to 5%. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i5/p600_s1?isAuthorized=no [article] Dimensional response analysis of bilinear systems subjected to non-pulselike earthquake ground motions [texte imprimé] / Karavasilis, Theodore L., Auteur ; Choung-Yeol Seo, Auteur ; Nicos Makris, Auteur . - 2011 . - pp. 600-606. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 5 (Mai 2011) . - pp. 600-606 Mots-clés : Dimensional  analysis  Self-similarity  Inelastic  displacement  Ground  acceleration  Ground  velocity  Mean  period Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The maximum inelastic response of bilinear single-degree-of-freedom (SDOF) systems when subjected to ground motions without distinguishable pulses is revisited with dimensional analysis by identifying timescales and length scales in the time histories of recorded ground motions. The characteristic length scale is used to normalize the peak inelastic displacement of the bilinear system. The paper adopts the mean period of the Fourier transform of the ground motion as an appropriate timescale and examines two different length scales that result from the peak ground acceleration and the peak ground velocity. When the normalized peak inelastic displacement is presented as a function of the normalized strength and normalized yield displacement, the response becomes self-similar, and a clear pattern emerges. Accordingly, the paper proposes two alternative predictive master curves for the response that solely involve the strength and yield displacement of the bilinear SDOF system in association with either the peak ground acceleration or the peak ground velocity, together with the mean period of the Fourier transform of the ground motion. The regression coefficients that control the shape of the predictive master curves are based on 484 ground motions recorded at rock and stiff soil sites and are applicable to bilinear SDOF systems with a postyield stiffness ratio equal to 2% and an inherent viscous damping ratio equal to 5%. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i5/p600_s1?isAuthorized=no