Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea
Abstract This study evaluates the potentials of liquefaction caused by the 2017 moment magnitude 5.4 earthquake in Pohang City, South Korea. We obtain shear wave velocity profiles measured by suspension PS logging tests at the five sites near the epicenter. We also perform downhole tests at three of...
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Online Access: | https://doi.org/10.1186/s40703-020-00132-1 |
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doaj-9c120b218d354076ab241b2ca761b4ba2021-01-31T16:15:34ZengSpringerOpenInternational Journal of Geo-Engineering2092-91962198-27832021-01-0112111010.1186/s40703-020-00132-1Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South KoreaYumin Ji0Byungmin Kim1Kiseog Kim2School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST)School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST)Heesong Geotek Co., Ltd.Abstract This study evaluates the potentials of liquefaction caused by the 2017 moment magnitude 5.4 earthquake in Pohang City, South Korea. We obtain shear wave velocity profiles measured by suspension PS logging tests at the five sites near the epicenter. We also perform downhole tests at three of the five sites. Among the five sites, the surface manifestations (i.e., sand boils) were observed at the three sites, and not at the other two sites. The maximum accelerations on the ground surface at the five sites are estimated using the Next Generation Attenuation relationships for Western United State ground motion prediction equations. The shear wave velocity profiles from the two tests are slightly different, resulting in varying cyclic resistance ratios, factors of safety against liquefaction, and liquefaction potential indices. Nevertheless, we found that both test approaches can be used to evaluate liquefaction potentials. The liquefaction potential indices at the liquefied sites are approximately 1.5–13.9, whereas those at the non-liquefied sites are approximately 0–0.3.https://doi.org/10.1186/s40703-020-00132-1LiquefactionSuspension PS logging testDownhole testShear wave velocityLiquefaction potential index |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yumin Ji Byungmin Kim Kiseog Kim |
spellingShingle |
Yumin Ji Byungmin Kim Kiseog Kim Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea International Journal of Geo-Engineering Liquefaction Suspension PS logging test Downhole test Shear wave velocity Liquefaction potential index |
author_facet |
Yumin Ji Byungmin Kim Kiseog Kim |
author_sort |
Yumin Ji |
title |
Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea |
title_short |
Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea |
title_full |
Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea |
title_fullStr |
Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea |
title_full_unstemmed |
Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea |
title_sort |
evaluation of liquefaction potentials based on shear wave velocities in pohang city, south korea |
publisher |
SpringerOpen |
series |
International Journal of Geo-Engineering |
issn |
2092-9196 2198-2783 |
publishDate |
2021-01-01 |
description |
Abstract This study evaluates the potentials of liquefaction caused by the 2017 moment magnitude 5.4 earthquake in Pohang City, South Korea. We obtain shear wave velocity profiles measured by suspension PS logging tests at the five sites near the epicenter. We also perform downhole tests at three of the five sites. Among the five sites, the surface manifestations (i.e., sand boils) were observed at the three sites, and not at the other two sites. The maximum accelerations on the ground surface at the five sites are estimated using the Next Generation Attenuation relationships for Western United State ground motion prediction equations. The shear wave velocity profiles from the two tests are slightly different, resulting in varying cyclic resistance ratios, factors of safety against liquefaction, and liquefaction potential indices. Nevertheless, we found that both test approaches can be used to evaluate liquefaction potentials. The liquefaction potential indices at the liquefied sites are approximately 1.5–13.9, whereas those at the non-liquefied sites are approximately 0–0.3. |
topic |
Liquefaction Suspension PS logging test Downhole test Shear wave velocity Liquefaction potential index |
url |
https://doi.org/10.1186/s40703-020-00132-1 |
work_keys_str_mv |
AT yuminji evaluationofliquefactionpotentialsbasedonshearwavevelocitiesinpohangcitysouthkorea AT byungminkim evaluationofliquefactionpotentialsbasedonshearwavevelocitiesinpohangcitysouthkorea AT kiseogkim evaluationofliquefactionpotentialsbasedonshearwavevelocitiesinpohangcitysouthkorea |
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