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Decomposition and effects of pulse components in near-field ground motions / Zhou Xu 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. 690-699 Titre : Decomposition and effects of pulse components in near-field ground motions Type de document : texte imprimé Auteurs : Zhou Xu, Auteur ; Anil Agrawal, Auteur Année de publication : 2011 Article en page(s) : pp. 690-699 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Near-field  ground  motions  Empirical  mode  decomposition  Pulse-type  excitations Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Long-period pulse components in near-field ground motions have been known to cause significant damage to flexible structures. In this paper, an empirical mode decomposition (EMD) approach is used to identify and separate the dominant pulse, high-frequency, and long-period components in near-field ground motions. The pulses synthesized by an analytical pulse model recently proposed by the authors are compared to the extracted pulse components from recorded earthquake records using EMD, and the responses of linear and nonlinear structures subjected to these components are analyzed. The results demonstrate that (1) the characteristics and effects of the pulses generated by the analytical pulse model are similar to those of the extracted pulse components and (2) the pulse components are responsible for the peak responses of elastic structures subjected to near-field ground motions and govern the extent of inelastic structural damage in all frequency ranges. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p690_s1?isAuthorized=no [article] Decomposition and effects of pulse components in near-field ground motions [texte imprimé] / Zhou Xu, Auteur ; Anil Agrawal, Auteur . - 2011 . - pp. 690-699. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 690-699 Mots-clés : Near-field  ground  motions  Empirical  mode  decomposition  Pulse-type  excitations Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Long-period pulse components in near-field ground motions have been known to cause significant damage to flexible structures. In this paper, an empirical mode decomposition (EMD) approach is used to identify and separate the dominant pulse, high-frequency, and long-period components in near-field ground motions. The pulses synthesized by an analytical pulse model recently proposed by the authors are compared to the extracted pulse components from recorded earthquake records using EMD, and the responses of linear and nonlinear structures subjected to these components are analyzed. The results demonstrate that (1) the characteristics and effects of the pulses generated by the analytical pulse model are similar to those of the extracted pulse components and (2) the pulse components are responsible for the peak responses of elastic structures subjected to near-field ground motions and govern the extent of inelastic structural damage in all frequency ranges. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p690_s1?isAuthorized=no