Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Direct determination of resonant properties of near-surface sediments using microtremor. / Kolesnikov, Yury I.; Fedin, Кonstantin V.; Ngomayezwe, Luckymore.
в: Soil Dynamics and Earthquake Engineering, Том 125, 105739, 01.10.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Direct determination of resonant properties of near-surface sediments using microtremor
AU - Kolesnikov, Yury I.
AU - Fedin, Кonstantin V.
AU - Ngomayezwe, Luckymore
PY - 2019/10/1
Y1 - 2019/10/1
N2 - This article describes a method of direct determination of the resonant properties of the near-surface sediments using microtremor records and results of testing the method on the test area. It is shown that the averaging amplitude spectra of a large number of microtremor records makes it possible to extract reliably several lowest modes of compressional and shear standing waves in the near-surface layer. Examples of mapping frequencies of these modes (natural frequencies of the layer) for an area of observations are given. For the fundamental mode of horizontal oscillations, a map of the amplification factors relative to the reference point located on the hard rock is also constructed. In addition, we present the maps of calculated from the natural frequencies, the effective (averaged over the near-surface layer thickness) ratios of shear and compressional velocities Vs/Vp and Poisson ratios. The obtained results were compared with the results of processing the same data using the Nakamura's technique.
AB - This article describes a method of direct determination of the resonant properties of the near-surface sediments using microtremor records and results of testing the method on the test area. It is shown that the averaging amplitude spectra of a large number of microtremor records makes it possible to extract reliably several lowest modes of compressional and shear standing waves in the near-surface layer. Examples of mapping frequencies of these modes (natural frequencies of the layer) for an area of observations are given. For the fundamental mode of horizontal oscillations, a map of the amplification factors relative to the reference point located on the hard rock is also constructed. In addition, we present the maps of calculated from the natural frequencies, the effective (averaged over the near-surface layer thickness) ratios of shear and compressional velocities Vs/Vp and Poisson ratios. The obtained results were compared with the results of processing the same data using the Nakamura's technique.
KW - Elastic standing waves
KW - Microtremor
KW - Natural frequencies
KW - Near surface
KW - Passive seismic method
KW - SEISMIC MICROZONATION
KW - GROUND-MOTION AMPLIFICATION
KW - SLOVENIA
KW - NOISE
KW - LOCAL GEOLOGY
KW - MEXICO-CITY
KW - BASIN
KW - SITE-RESPONSE
KW - EARTHQUAKE
KW - INDIA
UR - http://www.scopus.com/inward/record.url?scp=85068452837&partnerID=8YFLogxK
U2 - 10.1016/j.soildyn.2019.105739
DO - 10.1016/j.soildyn.2019.105739
M3 - Article
AN - SCOPUS:85068452837
VL - 125
JO - Soil Dynamics and Earthquake Engineering
JF - Soil Dynamics and Earthquake Engineering
SN - 0267-7261
M1 - 105739
ER -
ID: 20780902