Method to generate artificial earthquake accelerations with time domain enhancement and attenuation characteristics

To satisfy the requirements of performance-based design methods for a large number earthquake signals that contain series variable random variables, generation artificial seismic ground motion is necessary. statistics amplitudes’ instability in time domain, 500 recorded earthquakes have been divided into 5 groups by D5-95 durations and are statistically analyzed. For each group, its standard time-domain enhancement-attenuation process described as edge envelope curve, representativeness curve valued coverage rate. Comparing response spectrums before after multiplying with envelopes functions 6000 initial generated inverse Fourier different intensities durations, their well-matched. This newly proposed method proven to be able generate resemble natural amplitudes characteristics maintain desired frequency domain response.