Determination of the maximum residual displacements

by records of velocimeter

Part 2. Methods and results of estimating residual displacements

I. V. Kalinyuk, A. A. Yaroshenko, V. A. Boyko, and F. N. Pankov

1 Vernadsky Crimean Federal University, Simferopol, Russia

2 Crimean Expert Council on the Assessment of Seismic Effects and Earthquake Prediction, Simferopol, Russia

3 Sevastopol State University, Sevastopol, Russia

4 Admiral Ushakov State Maritime University (Sevastopol branch), Sevastopol, Russia

Corresponding author: I.V. Kalinyuk, e-mail: isgik@mail.ru

Abstract

The article describes ways to estimate and restore irreversible deformations that occur in the epicentral zone after destructive earthquakes, using velocimeters. An analytical model of residual displacement is proposed, which can be used to model displacements in synthesized accelerograms. The operation of installing residual displacements into waveforms of simulated soil movements is briefly described. According to the proposed model, it is possible to estimate the residual displacements. Examples of the restoration of residual displacements recorded by a velocimeter on a vibroplatform are given. A simple algorithm for estimating residual displacements based on interactive filtering of a long-period trend is described. The algorithm is implemented in the time domain and takes into account the amplitude-frequency characteristic of the velocimeter. The efficiency of the algorithm was tested on a synthesized accelerogram containing residual displacements, and the algorithm was applied to the records of explosions.

Keywords: residual displacements, step model, velocimeter, vibroplatform

Аbout the authors

KALINYUK Igor Viktorovich - Candidate of Physical and Mathematical Sciences, Deputy Director, Institute of Seismology and Geodynamics, V.I. Vernadsky Crimean Federal University, 295007, Russia, Simferopol, prosp. Academician Vernadsky, 4. Tel. : 8 (3652) 27-34-27. E-mail: isgik@mail.ru

YAROSHENKO Aleksandr Aleksandrovich – Doctor of Physical and Mathematical Sciences, Professor of the Department of Higher Mathematics, Sevastopol State University. 299053, Russia, Sevastopol, st. Universitetskaya str., 33. E-mail: vmsevntu@mail.ru. Admiral Ushakov State Maritime University (Sevastopol branch). 299009, Russia, Sevastopol, st. Heroes of Sevastopol, 7, bldg. 8/22. E-mail: iec.sevgmu@ya.ru

PANKOV Fedor Nikolaevich – Leading Engineer, Institute of Seismology and Geodynamics, V.I. Vernadsky Crimean Federal University, 295007, Russia, Simferopol, prosp. Academician Vernadsky, 4. Tel.: 8 (3652) 27-34-27. E-mail: pankovfn@gmail.com

BOIKO Vladislav Anatolievich - engineer of the 1st category, Institute of Seismology and Geodynamics, V.I. Vernadsky Crimean Federal University, 295007, Russia, Simferopol, prosp. Academician Vernadsky, 4. Tel.: 8 (3652) 27-34-27. E-mail: boikovlan@gmail.com

Cite this article as: Kalinyuk I.V., Yaroshenko A.A., Pankov F.N.., Boyko V.A. Determination of the maximum residual displacements by records of velocimeter. Part 2. Methods and results of estimating residual displacements, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology), 2018, Vol. 45, No. 4, pp. 95–105. [in Russian]. DOI: 10.21455/VIS2018.4-6

English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990), 2019, Volume 55, Issue 4.