Effect of
the uppermost part of the soil profile on the site response
A.V.
Kalinina, S.M. Ammosov, V.V. Bykova, R.E. Tatevossian
Schmidt Institute of Physics of the Earth, Russian
Abstract. Effect of the uppermost part of the soil profile on the seismic
excitations is analyzed. Six soil profiles are considered. Linear equivalent
modeling is applied to calculate the site response. Peak ground acceleration of
the input signal to the soil profile varies from 0.1 to 0.6 g. It is shown that the dependence of
soil physical-mechanical properties on the deformation lead to variations in
spectral amplitudes of the response spectra on free-field. Increase in the
thickness of the uppermost layer significantly influences the response spectra
shape. The PGA, damping coefficient, deformation, and shear-wave
velocity distribution with depth are calculated tacking into account
degradation curves. It is demonstrated that limiting the damping coefficient by
15 % very slightly affects the resulting free-field spectra. Soil profile decreases
the input signal (PGA) when it exceeds 0.3 g.
Keywords: response spectrum, degradation curves, equivalent linear modeling,
seismogeological model of soil, PGA.
About the authors
KALININA Anna V. - Ph.D. (phys. and math.),
leading researcher, Schmidt Institute of Physics of the Earth, RAS. Moscow, Russia. Tel.: +7 (499) 254-24-30. E-mail:
kalinina_av@mail.ru
AMMOSOV Sergey M. - Ph.D. (phys. and math.),
senior researcher, Schmidt Institute of Physics of the Earth, RAS.
BYKOVA Vera V. - Ph.D. (phys. and math.),
leading researcher, Schmidt Institute of Physics of the Earth, RAS. Moscow, Russia. Tel.: +7 (499) 254-53-16. E-mail:
vvb@ifz.ru
TATEVOSSIAN Ruben E. - Doctor (phys. and math.),
principal researcher, Schmidt Institute of Physics of the Earth, RAS.
Cite this article as: Kalinina A.V., Ammosov S.M., Bykova
V.V., Tatevossian R.E. Effect of the uppermost part of the soil profile on the
site response, Voprosy Inzhenernoi
Seismologii (Problems of Engineering Seismology), 2017, vol. 44, no. 4, pp.
77–92. [in Russian]. DOI: 10.21455/VIS2017.4-5
English translation of the article
will be published in Seismic Instruments,
ISSN: 0747-9239 (Print) 1934-7871 (Online),
https://link.springer.com/journal/11990), 2018, Volume 54, Issue 4.