Problems of Engineering Seismology: article

Development of a method for studying the resonance characteristics of soils from spectral H/V ratios
M.V. Rodkin 1,2 A.G. Bugaevskiy 3
1 Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences 2 Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Sciences 3 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Problems of Engineering Seismology
Tome: 49
Number: 4
Year: 2022
Pages: 171-186
UDK: 550.34.01
DOI: 10.21455/VIS2022.4-12
Keywords: seismic microzoning, noisy seismic records, spectral H/V ratios, identification of frequencies of resonant vibrations of soils and frequencies of natural vibrations of structures
Аnnotation: An improved statistical method for determining the resonant frequencies of soils from spectral H/V ratios is presented. The combination of developed methodological and computational techniques allows identifying with high reliability the resonant frequencies of the soil strata and the main frequencies of natural vibrations of structures and their elements according to engineering seismological observations. The possibility of refining the seismic soil model of the site and compiling spatial models of the change in the depths of the seismic boundaries of the layers of the soil stratum based on the results of frequency analysis of records of microseisms and seismic events is shown. The use of the described engineering and seismological observations and methodological techniques makes it possible to estimate by instrumental means the increase in the amplitudes of vibrations of structures and their individual elements at resonant frequencies and provides the possibility of obtaining a sufficiently detailed seismometric floor-by-floor description of the vibrational characteristics of buildings and structures.