File size: 11 MB

SeismoSignal constitutes a simple, yet efficient, package for the processing of strong-motion data. Amongst other things, it allows for the derivation of elastic and constant ductility inelastic response spectra, computation of Fourier amplitude spectra, filtering of high and low frequency record content and estimation of other important seismological parameters, such as the Arias Intensity and the significant and effective durations.

SeismoSignal calculates:

Elastic and constant-ductility inelastic response spectra

Fourier and Power spectra

Arias (Ia) and characteristic (Ic) intensities

Cumulative Absolute Velocity (CAV) and Specific Energy Density (SED)

Root-mean-square (RMS) of acceleration, velocity and displacement

Sustained maximum acceleration (SMA) and velocity (SMV)

Effective design acceleration (EDA) Acceleration (ASI) and velocity (VSI) spectrum intensity

Predominant (Tp) and mean (Tm) periods

Husid and energy flux plots

Bracketed, uniform, significant and effective durations

SeismoSignal also enables the filtering of unwanted frequency content of the given signal. Three different digital filter types are available, all of which capable of carrying out highpass, lowpass, bandpass and bandstop filtering.

The program is able to read accelerograms defined in both single- and multiple-values per line formats (the two most popular formats used by strong-motion databases), and can apply baseline correction and filtering prior to time-integration of the signal (to obtain velocity and displacement time-histories).