Amplitude variability in simulated incoherent seismic ground motions1 / Dimitris Pachakis in Journal of engineering mechanics, Vol. 133 N°7 (Juillet 2007)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 133 N°7 (Juillet 2007) . - pp.844–848. Titre : Amplitude variability in simulated incoherent seismic ground motions1 Type de document : texte imprimé Auteurs : Dimitris Pachakis, Auteur ; Lambros S. Katafygiotis, Auteur ; Aspasia Zerva, Auteur Année de publication : 2007 Article en page(s) : pp.844–848. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Ground motion Simulation models Random processes Spectral density function analysis Fourier transform Résumé : This note compares in detail four commonly used schemes for the simulation of spatially variable ground motions. Emphasis is placed not only on the conformity of the simulations with the power and cross spectral density of the random field but, also, on the examination of the consistency of the simulations with the homogeneity condition, and the (Fourier) amplitude variability of the simulations. It is shown that, whereas three techniques that simulate ground motions in parallel satisfy the homogeneity requirement, produce simulations with random amplitudes, and amplitude and phase variability consistent with that of recorded data, one technique that simulates motions in sequence does not. ISSN : 0733-9399 En ligne : Ground motion, Simulation models, Random processes, Spectral density function, S [...] [article] Amplitude variability in simulated incoherent seismic ground motions1 [texte imprimé] / Dimitris Pachakis, Auteur ; Lambros S. Katafygiotis, Auteur ; Aspasia Zerva, Auteur . - 2007 . - pp.844–848. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°7 (Juillet 2007) . - pp.844–848. Mots-clés : Ground motion Simulation models Random processes Spectral density function analysis Fourier transform Résumé : This note compares in detail four commonly used schemes for the simulation of spatially variable ground motions. Emphasis is placed not only on the conformity of the simulations with the power and cross spectral density of the random field but, also, on the examination of the consistency of the simulations with the homogeneity condition, and the (Fourier) amplitude variability of the simulations. It is shown that, whereas three techniques that simulate ground motions in parallel satisfy the homogeneity requirement, produce simulations with random amplitudes, and amplitude and phase variability consistent with that of recorded data, one technique that simulates motions in sequence does not. ISSN : 0733-9399 En ligne : Ground motion, Simulation models, Random processes, Spectral density function, S [...]

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