SPECTRAL-TEMPORAL FEATURES OF SEISMIC LOADINGS ON THE BASIS OF STRONG MOTION WAVELET DATABASE

Abstract

There are many different techniques for seismic impact simulation for engineering purposes.
Some of them are very detailed and while practice needs quite simple and effective one. All of the techniques
widely used determine envelop of seismic process in the time domain. Currently, it is possible to build a model
based on a detailed study of the spectral and temporal energy content of seismic process. Wavelet analysis is an
effective tool for spectral-temporal analysis. New type of database was developed for new seismic loadings
model research. The main features are: wavelet transformation of initial seismic data (accelerograms), taking
into account relative orientation of fault plane and station site. New algorithms of polarization and wavelet
analysis were developed. The second one is based on fast Fourier transform and more efficient for big data
processing. Spectral-temporal envelope matrix was introduced as new parameter for development of new impact
models. Polarization analysis results show a good accordance of p-wave ellipsoid azimuth correlation with
calculated one, while s-wave (group of SH-waves) plane is strongly influenced by relative fault plane location.
Obtained results may be used for new empirical-analytical model of seismic impacts development for usage in
seismic design.