Digital Simulation Of Non-StationaryMultivariate Earthquake Ground Motion
Mario Di Paola, Massimiliano Zingales · WIT transactions on the built environment · 1970
The study deals in detail with the digital simulation of non-stationary multivariate vector of seismic ground motions. The ground acceleration consists in an opportune discretization of a random field in different locations. The nonstationarity is considered uniformly modulated in time. The modulating functions accounts for the time-amplitude variation of the seismic acceleration. The digital simulation of the ground motion is performed by means of a new decomposition of the power spectral density matrix based on frequency dependent eigenproperties. Numerical examples show the capabilities of the technique.