Horizontal and vertical ground motion prediction equations derived from the Italian Accelerometric Archive (ITACA) |
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| Authors: | D Bindi L Luzi M Massa F Pacor |
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| Institution: | (1) Department of Structural Engineering, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milan, Italy |
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| Abstract: | A set of Ground Motion Prediction Equations (GMPEs) for the Italian territory is proposed, exploiting a new strong-motion
data set become available since July 2007 through the Italian Accelerometric Archive (ITACA). The data set is composed by
561 three-component waveforms from 107 earthquakes with moment magnitude in the range 4.0–6.9, occurred in Italy from 1972
to 2007 and recorded by 206 stations at distances up to 100 km. The functional form used to derive GMPEs in Italy (Sabetta
and Pugliese in Bull Seismol Soc Am 86(2):337–352, 1996) has been modified introducing a quadratic term for magnitude and
a magnitude-dependent geometrical spreading. The coefficients for the prediction of horizontal and vertical peak ground acceleration,
peak ground velocity and 5% damped acceleration response spectra are evaluated. This paper illustrates the new data set, the
regression analysis and the comparisons with recently derived GMPEs in Europe and in the Next Generation Attenuation of Ground
Motions (NGA) Project. |
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