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Détail de l'auteur
Auteur Elia Voyagaki
Documents disponibles écrits par cet auteur
Affiner la recherchePlastic input motion / Elia Voyagaki in Journal of engineering mechanics, Vol. 138 N° 7 (Juillet 2012)
[article]
in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.749–760
Titre : Plastic input motion : Transformation for the response of yielding oscillators Type de document : texte imprimé Auteurs : Elia Voyagaki, Auteur ; Mylonakis, George, Auteur ; Ioannis N. Psycharis, Auteur Année de publication : 2012 Article en page(s) : pp.749–760 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Nonlinear response Yielding oscillator Scaling Closed-form solution Near-fault motion Pulse Dynamics Earthquake response Résumé : A transformation method is presented for the response of yielding oscillators to dynamic loading. The method employs a translation in the ordinates and the abscissa of the excitation function by means of a pair of parameters uniquely dependent on the yielding resistance and the vibrational characteristics of the system. By this approach: (1) the differential operator becomes linearlike, with the nonlinearity transferred to the right-hand side; (2) the initial conditions are simplified; and (3) the modified forcing term becomes uniquely associated with the development of plastic deformation. The theory is applied to various yielding oscillators subjected to idealized earthquake pulses, with the modified excitation function termed plastic input motion (PIM). A procedure for applying the method to general waveforms is provided. The coordinates of PIM may be discontinuous and significantly smaller than those of the original excitation function, as a considerable amount of ground acceleration is devoted to overcoming the elastic resistance of the system. The theory can be useful in earthquake engineering by offering a replacement to physical ground motions with system-dependent PIMs for establishing demand indices. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000373 [article] Plastic input motion : Transformation for the response of yielding oscillators [texte imprimé] / Elia Voyagaki, Auteur ; Mylonakis, George, Auteur ; Ioannis N. Psycharis, Auteur . - 2012 . - pp.749–760.
Mécanique appliquée
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.749–760
Mots-clés : Nonlinear response Yielding oscillator Scaling Closed-form solution Near-fault motion Pulse Dynamics Earthquake response Résumé : A transformation method is presented for the response of yielding oscillators to dynamic loading. The method employs a translation in the ordinates and the abscissa of the excitation function by means of a pair of parameters uniquely dependent on the yielding resistance and the vibrational characteristics of the system. By this approach: (1) the differential operator becomes linearlike, with the nonlinearity transferred to the right-hand side; (2) the initial conditions are simplified; and (3) the modified forcing term becomes uniquely associated with the development of plastic deformation. The theory is applied to various yielding oscillators subjected to idealized earthquake pulses, with the modified excitation function termed plastic input motion (PIM). A procedure for applying the method to general waveforms is provided. The coordinates of PIM may be discontinuous and significantly smaller than those of the original excitation function, as a considerable amount of ground acceleration is devoted to overcoming the elastic resistance of the system. The theory can be useful in earthquake engineering by offering a replacement to physical ground motions with system-dependent PIMs for establishing demand indices. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000373