Semenova Y. Physical parameters of soil oscillations in problems of seismic zoning

The dissertation is devoted to developing and improving the existing scientific and theoretical foundations of the seismic zoning methodology in the physical parameters of soil oscillations in a territory with insufficient provision of instrumental observations. The methodology makes it possible to move in the calculations of structures for seismic resistance from the use of seismic intensity points and category soils of their seismic properties to the physical parameters of predicted ground motions. The new improved methodology was implemented on the example of the territory of Kyiv. A map of the distribution of the coefficient of integral spectral amplification of seismic motions by soils for the territory of Kyiv has been developed. The map gives the distribution over the territory of a quantitative assessment of the influence of the spectral characteristics of soil conditions on the seismic hazard. In the methods of calculating buildings and structures for seismic resistance, for more substantiated and realistic assessments, it is proposed to use the integral spectral amplification coefficients as ground correction factors. A map of seismic zoning of Kyiv in peak ground accelerations was built for the case of predicted seismic effects with a maximum amplitude of up to 0.06g. It is recommended to use the map for engineering purposes in addition to the calculated Fourier amplitude spectra and response spectra. Mathematical models of the soil base of critical structures of the Tashlyk PSP, Kanivska HPP, Zaporizhzhia NPP, South-Ukrainian NPP, Serednyodniprovska HPP, Yagotin compressor station have been developed, and the predicted amplitude and spectral parameters of soil oscillations have been calculated. Keywords: seismic zoning, ground motions parameters, amplification of seismic motions, soil dynamics, modeling of the seismic response of soils, peak ground accelerations.