Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform

Aiming to address the problem of pulse-like ground motions being difficult to identify, this paper refines the Baker’s wavelet-based pulse-like ground motions identification method, followed by a new pulse-like ground motion identification method based on Hilbert–Huang Transform (HHT) being proposed...

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Autor principal:	Zhen Liu
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/e30f7b7da5f048cf9ded77b9e0dfe68c
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spelling	oai:doaj.org-article:e30f7b7da5f048cf9ded77b9e0dfe68c2021-11-08T02:36:13ZQuantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform1875-920310.1155/2021/9915362https://doaj.org/article/e30f7b7da5f048cf9ded77b9e0dfe68c2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/9915362https://doaj.org/toc/1875-9203Aiming to address the problem of pulse-like ground motions being difficult to identify, this paper refines the Baker’s wavelet-based pulse-like ground motions identification method, followed by a new pulse-like ground motion identification method based on Hilbert–Huang Transform (HHT) being proposed. In this method, HHT is used to decompose ground motions instead of wavelet. HHT can overcome the dependence of wavelet analysis on the selection of mother wave, and thus more complex velocity pulses can be identified. In order to compare the effects of two pulse-like ground motion identification methods, HHT-based method and wavelet-based method, respectively, are used to identify ground motions in Pacific Earthquake Engineering Research Center (PEER). After identifying the 3066 groups of ground motions selected from PEER, it is found that the HHT-based method can identify 229 pulse-like ground motions, and the wavelet-based method can identify 150 pulse-like ground motions. More complex shapes of near-fault velocity pulses can be extracted by the HHT-based method. By analyzing the seismic response, fault distance, and cumulative squared velocity (CSV) of these pulse-like ground motions, it is found that the pulse-like ground motions identified by the HHT-based method have strong near-fault characteristics. If a high recognition quality can be guaranteed, the proposed HHT-based method can identify many kinds of near-fault velocity pulses and thus provide more pulse-like ground motions for seismic researches.Zhen LiuHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Zhen Liu Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
description	Aiming to address the problem of pulse-like ground motions being difficult to identify, this paper refines the Baker’s wavelet-based pulse-like ground motions identification method, followed by a new pulse-like ground motion identification method based on Hilbert–Huang Transform (HHT) being proposed. In this method, HHT is used to decompose ground motions instead of wavelet. HHT can overcome the dependence of wavelet analysis on the selection of mother wave, and thus more complex velocity pulses can be identified. In order to compare the effects of two pulse-like ground motion identification methods, HHT-based method and wavelet-based method, respectively, are used to identify ground motions in Pacific Earthquake Engineering Research Center (PEER). After identifying the 3066 groups of ground motions selected from PEER, it is found that the HHT-based method can identify 229 pulse-like ground motions, and the wavelet-based method can identify 150 pulse-like ground motions. More complex shapes of near-fault velocity pulses can be extracted by the HHT-based method. By analyzing the seismic response, fault distance, and cumulative squared velocity (CSV) of these pulse-like ground motions, it is found that the pulse-like ground motions identified by the HHT-based method have strong near-fault characteristics. If a high recognition quality can be guaranteed, the proposed HHT-based method can identify many kinds of near-fault velocity pulses and thus provide more pulse-like ground motions for seismic researches.
format	article
author	Zhen Liu
author_facet	Zhen Liu
author_sort	Zhen Liu
title	Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
title_short	Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
title_full	Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
title_fullStr	Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
title_full_unstemmed	Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform
title_sort	quantitative identification of pulse-like ground motions based on hilbert–huang transform
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/e30f7b7da5f048cf9ded77b9e0dfe68c
work_keys_str_mv	AT zhenliu quantitativeidentificationofpulselikegroundmotionsbasedonhilberthuangtransform
_version_	1718443145716301824

Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform

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