A method for calculating seismic hazard curves on free-surface

R.E. Tatevossian, S.M. Ammosov, V.V. Bykova, R.N. Vakarchuk, А.V. Kalinina

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

Corresponding author: R.E. Tatevossian, e-mail: ruben@ifz.ru

Abstract. A method for calculating seismic hazard curves on free-surface is proposed. Its validity is illustrated by hypothetical situation, quite common with seismotectonic and soil profile conditions in platform regions: low level of local activity neighboring with active deep seismic source zone, and shallow bedrock overlaid by consolidated soil profile. It is shown that description of local conditions of critical facility siting by VS30 (average velocity of shear waves in upper 30 m of soil profile) is not sufficient. Though such description provides in general higher values of spectral amplitudes, however, it is does not take into account possible resonance phenomena. Besides, it ignores attenuation of energy by soil profile because of inelastic behavior.

Keywords: seismic hazard, hazard curves, response spectrum, ground conditions, probabilistic safety analysis

About the authors

TATEVOSSIAN Ruben Eduardovich – Doctor of Physical and Mathematical Sciences, Chief Researcher, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. E-mail: ruben@ifz.ru

AMMOSOV Sergey Mikhailovich − Candidate of Physical and Mathematical Sciences, Senior Researcher, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. E-mail: ammosovser@mail.ru

BYKOVA Vera Vyacheslavovna – Candidate of Physical and Mathematical Sciences, Leading Researcher, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. E-mail: vvb@ifz.ru

VAKARCHUK Roman Nikolaevich − Senior Researcher, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. E-mail: roman@mail.ru

KALININA Anna Viktorovna – Candidate of Physical and Mathematical Sciences, Leading Researcher, Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. E-mail: kalinina_av@mail.ru

Cite this article as: Tatevossian R.E., Ammosov S.M., Bykova V.V., Vakarchuk R.N., Kalinina А.V. A method for calculating seismic hazard curves on free-surface, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology). 2019. V. 46, No. 2. P. 16–24. [in Russian]. https://doi.org/10.21455/VIS2019.2-2

English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990