Simulation of non stationary ground motion compatible withNGA-spectra

Irmela Zentner, Laura D'Amico, Pierfrancesco Cacciola

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

The modelling of seismic load is a major topic that has to be addressed thoroughlywhen performingtransient seismic analysis.A common approach, widely accepted also by the international seismic codes, is tosimulate artificial accelerograms whose mean or median response spectrum matches, within a certain toleranceand along a defined range of frequencies, a target response spectrum. However, recent ground motion attenuationmodels do not only provide median or mean values but come along with information on dispersion and spectralcorrelations (Baker & Jayaram 2008). Concurrently, common ground motion models based on power spectraldensities do not allow to simulate artificial accelerograms featuring all of the variability observed for recordedtime histories. In this paper, the information on dispersion and correlation of pseudo-spectral acceleration valuesis used in order to construct a probabilistic spectrum-compatible non-stationary power spectral density model.Samples of ground motion time histories can be simulated using the classical spectral representation theoremfor evolutionary power spectral densities.
Original languageEnglish
Title of host publicationSafety, Reliability, Risk and Life-Cycle Performance of Structures & Infrastructures
Place of PublicationLondon
PublisherTaylor & Francis
Pages2349-2355
Number of pages7
ISBN (Electronic)9781315884882
ISBN (Print)9781138000865
Publication statusPublished - 1 Jan 2014
EventSafety, Reliability, Risk and Life-Cycle Performance of Structures & Infrastructures - New York, USA, 16-20 June 2013
Duration: 1 Jan 2014 → …

Conference

ConferenceSafety, Reliability, Risk and Life-Cycle Performance of Structures & Infrastructures
Period1/01/14 → …

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Zentner, I., D'Amico, L., & Cacciola, P. (2014). Simulation of non stationary ground motion compatible withNGA-spectra. In Safety, Reliability, Risk and Life-Cycle Performance of Structures & Infrastructures (pp. 2349-2355). London: Taylor & Francis.