An algorithm developed in Matlab for the automatic selection of cut-off frequencies, in the correction of strong motion data

Sakkas, G.; Sakellariou, N.

doi:10.1007/s11600-018-0150-1

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Tytuł artykułu

An algorithm developed in Matlab for the automatic selection of cut-off frequencies, in the correction of strong motion data

Autorzy

Sakkas G. , Sakellariou N.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-018-0150-1

Warianty tytułu

Języki publikacji

Abstrakty

Strong motion recordings are the key in many earthquake engineering applications and are also fundamental for seismic design. The present study focuses on the automated correction of accelerograms, analog and digital. The main feature of the proposed algorithm is the automatic selection for the cut-off frequencies based on a minimum spectral value in a predefined frequency bandwidth, instead of the typical signal-to-noise approach. The algorithm follows the basic steps of the correction procedure (instrument correction, baseline correction and appropriate filtering). Besides the corrected time histories, Peak Ground Acceleration, Peak Ground Velocity, Peak Ground Displacement values and the corrected Fourier Spectra are also calculated as well as the response spectra. The algorithm is written in Matlab environment, is fast enough and can be used for batch processing or in real-time applications. In addition, the possibility to also perform a signal-tonoise ratio is added as well as to perform causal or acausal filtering. The algorithm has been tested in six significant earthquakes (Kozani-Grevena 1995, Aigio 1995, Athens 1999, Lefkada 2003 and Kefalonia 2014) of the Greek territory with analog and digital accelerograms.

Słowa kluczowe

accelerogram automatic processing filtering cut-off frequencies baseline correction

akcelerogram przetwarzanie automatyczne filtracja częstotliwości odcięcia

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2018

Tom

Vol. 66, no. 4

Strony

425--448

Opis fizyczny

Bibliogr. 63 poz.

Twórcy

autor

Sakkas G.

sakkasg@geol.uoa.gr

Section of Geophysics - Geothermics, National and Kapodistrian University of Athens, 15784 Zografou, Greece

autor

Sakellariou N.

Section of Geophysics - Geothermics, National and Kapodistrian University of Athens, 15784 Zografou, Greece

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