Simulation of non-stationary stochastic ground motions based on recent Italian earthquakes

Abstract This work presents an up-to-date model for the simulation of non-stationary ground motions, including several novelties compared to original study Sabetta and Pugliese (Bull Seism Soc Am 86:337–352, 1996). The selection input motion in framework earthquake engineering has become progressively more important with growing use nonlinear dynamic analyses. Regardless increasing availability large strong databases, records are not always available a given scenario site condition, requiring adoption simulated time series. Among different techniques generation records, we focused on methods based stochastic simulations, considering time- frequency decomposition seismic motion. We updated initially developed 1996) later modified by Pousse et al. 96:2103–2117, 2006) Laurendeau (Nonstationary ground-motion histories: application Japanese database. 15 WCEE Lisbon, 2012). is S-transform that implicitly considers both amplitude modulation. four parameters required are: Arias intensity, significant duration, central frequency, bandwidth. They were obtained from empirical calibrated using accelerometric included Italian strong-motion database ITACA. accelerograms show good match prediction measures, such as peak acceleration, velocity, Fourier spectra, response spectra.