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Authors: Ameri, G.* 
Akinci, A.* 
Cocco, M.* 
Cultrera, G.* 
Franceschina, G.* 
Lombardi, A.* 
Pacor, F.* 
Pessina, V.* 
Zonno, G.* 
Issue Date: 19-Jul-2007
Keywords: ground motion scenarios
Subject Classification04. Solid Earth::04.06. Seismology::04.06.04. Ground motion 
Abstract: A predominantly deterministic viewpoint has been adopted for computing seismic ground motion both for urban areas (SP10) and infrastructures loss modeling (SP11) at three selected areas: the cities of Lisbon (Portugal) and Thessaloniki (Greece), and the metropolis of Istanbul (Turkey). The generation of earthquake ground motion scenarios involves both the particular choice of earthquake sources with associated fault rupture parameters, and the ensuing ground motion field calculated by an appropriate numerical tool, or empirically estimated, at a set of selected points within the urban area of interest. Ground shaking values are predicted for rock conditions and for two distinct frequency bands, i.e. the high frequency range (from 1.0 Hz to 4-5 Hz) in the case of damage evaluation for the vast majority of ordinary building, and the low frequency (≤ 2 Hz) more appropriate for lifeline system damage assessment. The advanced simulation techniques allowed to properly consider the finite fault effects and directivity, which imply extreme expected values, and they are capable of quantifying the spatial variability of the ground motion near the extended fault.
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