Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region

In this study, we evaluated the response spectra of 24 earthquake series, which includes 15 from the Kumamoto earthquake series and 9 from the Pohang earthquake series, and explored the effects of earthquake magnitude on the resonance frequencies of structures and buildings. Furthermore, the observa...

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Autores principales:	Jun-Kyoung Kim, Soung-Hoon Wee, Seong-Hwa Yoo, Kwang-Hee Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Gyeongju earthquake horizontal response spectrum KBC 2016 Regulatory Guide 1.60 resonance frequency vertical response spectrum Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/b93980a5dc354f1d9ab6a57651e24920
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spelling	oai:doaj.org-article:b93980a5dc354f1d9ab6a57651e249202021-11-25T16:35:30ZCharacteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region10.3390/app1122106902076-3417https://doaj.org/article/b93980a5dc354f1d9ab6a57651e249202021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10690https://doaj.org/toc/2076-3417In this study, we evaluated the response spectra of 24 earthquake series, which includes 15 from the Kumamoto earthquake series and 9 from the Pohang earthquake series, and explored the effects of earthquake magnitude on the resonance frequencies of structures and buildings. Furthermore, the observations of this study were compared with the design response spectra, Regulatory Guide 1.60 (The United States Nuclear Regulatory Commission, 1973) for Korean nuclear power plants, and with the Korean Building Code (MOLIT, 2016, hereinafter referred to as KBC 2016) for general structures and buildings. The response spectra, after normalization with reference to the peak ground acceleration (PGA), were derived using a total of 423 horizontal and vertical accelerations. It was observed that the shapes of the horizontal and vertical response spectra were strongly dependent on the magnitude of the earthquake and the resonance frequency. Given the strong dependence of the response on the magnitude, it is suggested to consider magnitude > ML ~ 6.0 when establishing design response spectra. Compared to inland areas, a fairly higher amplitude of response at significantly lower frequency ranges could be attributed to the local geological environment of Jeju Island, which was formed by a surface volcano eruption and the distribution of unconsolidated Pleistocene marine sediments in the Jeju area. It is necessary to study the characteristic influence of layers with low shear wave velocity distributed in the Jeju region on seismic responses more rigorously while considering the frequency band and amplitudes at the surface of Jeju. The resonance frequencies of general low-rise and mid-rise buildings by the brief formula and those by design response spectra both suggested by KBC 2016 were overlapped, and these indicated that the seismic hazard could be much higher on general buildings in the Jeju region than in inland areas. Lastly, it is necessary to make the design standard criteria for Reg. Guide 1.60 and KBC 2016 more conservative in the lower frequency range of higher than 0.6 Hz and 2.0–6.0 Hz, respectively, which is significantly lower than those of the inland area, and to establish improved design response spectra with site-specific seismic design standards by referencing large amounts of qualitative data from the region around the Korean Peninsula.Jun-Kyoung KimSoung-Hoon WeeSeong-Hwa YooKwang-Hee KimMDPI AGarticleGyeongju earthquakehorizontal response spectrumKBC 2016Regulatory Guide 1.60resonance frequencyvertical response spectrumTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10690, p 10690 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gyeongju earthquake horizontal response spectrum KBC 2016 Regulatory Guide 1.60 resonance frequency vertical response spectrum Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	Gyeongju earthquake horizontal response spectrum KBC 2016 Regulatory Guide 1.60 resonance frequency vertical response spectrum Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Jun-Kyoung Kim Soung-Hoon Wee Seong-Hwa Yoo Kwang-Hee Kim Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
description	In this study, we evaluated the response spectra of 24 earthquake series, which includes 15 from the Kumamoto earthquake series and 9 from the Pohang earthquake series, and explored the effects of earthquake magnitude on the resonance frequencies of structures and buildings. Furthermore, the observations of this study were compared with the design response spectra, Regulatory Guide 1.60 (The United States Nuclear Regulatory Commission, 1973) for Korean nuclear power plants, and with the Korean Building Code (MOLIT, 2016, hereinafter referred to as KBC 2016) for general structures and buildings. The response spectra, after normalization with reference to the peak ground acceleration (PGA), were derived using a total of 423 horizontal and vertical accelerations. It was observed that the shapes of the horizontal and vertical response spectra were strongly dependent on the magnitude of the earthquake and the resonance frequency. Given the strong dependence of the response on the magnitude, it is suggested to consider magnitude > ML ~ 6.0 when establishing design response spectra. Compared to inland areas, a fairly higher amplitude of response at significantly lower frequency ranges could be attributed to the local geological environment of Jeju Island, which was formed by a surface volcano eruption and the distribution of unconsolidated Pleistocene marine sediments in the Jeju area. It is necessary to study the characteristic influence of layers with low shear wave velocity distributed in the Jeju region on seismic responses more rigorously while considering the frequency band and amplitudes at the surface of Jeju. The resonance frequencies of general low-rise and mid-rise buildings by the brief formula and those by design response spectra both suggested by KBC 2016 were overlapped, and these indicated that the seismic hazard could be much higher on general buildings in the Jeju region than in inland areas. Lastly, it is necessary to make the design standard criteria for Reg. Guide 1.60 and KBC 2016 more conservative in the lower frequency range of higher than 0.6 Hz and 2.0–6.0 Hz, respectively, which is significantly lower than those of the inland area, and to establish improved design response spectra with site-specific seismic design standards by referencing large amounts of qualitative data from the region around the Korean Peninsula.
format	article
author	Jun-Kyoung Kim Soung-Hoon Wee Seong-Hwa Yoo Kwang-Hee Kim
author_facet	Jun-Kyoung Kim Soung-Hoon Wee Seong-Hwa Yoo Kwang-Hee Kim
author_sort	Jun-Kyoung Kim
title	Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
title_short	Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
title_full	Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
title_fullStr	Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
title_full_unstemmed	Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region
title_sort	characteristics of the vertical and horizontal response spectra of earthquakes in the jeju island region
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b93980a5dc354f1d9ab6a57651e24920
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_version_	1718413098872733696

Characteristics of the Vertical and Horizontal Response Spectra of Earthquakes in the Jeju Island Region

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