SIMULATION OF THE FOURIER PHASE SPECTRUM FOR THE GENERATION OF SYNTHETIC ACCELEROGRAMS |
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| Authors: | V MONTALDO A S KIREMIDJIAN H THRÁINSSON? G ZONNO |
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| Institution: | 1. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Milano , Via Bassini, 15-20133, Milano, Italy;2. Department of Civil and Environmental Engineering , The John A. Blume Earthquake Engineering Center, Stanford University , Stanford, 94034, CA, USA |
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| Abstract: | This study presents the application of a new method for generating synthetic accelerograms based on statistical distributions for Fourier phase differences and Fourier amplitudes as functions of earthquake magnitude, hypocentral distance and site geology. Two important characteristics of the methodology are that it requires a small number of input parameters and that ground motion time histories can be simulated without any specific modulation function. Two areas with different tectonic patterns (North-Eastern and Central Italy) were selected for the application. The results of our analysis are reliable in the case of Central Italy because the data set is large and quite uniformly distributed, while for North-Eastern Italy our results should not be used for distances greater than 30 km. |
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| Keywords: | Ground motion simulation Fourier spectrum Beta distribution lognormal distribution |
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