SPECTRAL CHARACTERISTICS OF SEISMIC WAVES AT STRONG GROUND MOTIONS

Abstract

Introduction of the value of the weight-average period of ground vibrations significantly improves
the differentiation quality of various types of soils. The dependence of the spectral composition of the seismic
waves on power, physical and mechanical properties of soils that compound a ground stratum and
hydrogeological conditions are considered. On the basis of data analysis a conclusion about high usefulness of
powerful pulsed and vibration artificial nonexplosive sources for seismic microzonation is made. A particular
attention was paid to the investigation of the absorption indexes of seismic energy in different types of soil. It is
shown that the use of the extended type of soil indexes, in particular, to include the standard spectral
characteristics can significantly improve the accuracy and reliability of the establishment of engineering and
geological cross-section of a ground stratum and its hydrogeological conditions.