Ground motion,liquefaction and hazard analysis at the Palu site during the 2018 Indonesian great earthquake(M_(w)7.5)OA
The research findings on the ground motion and liquefaction potential analyses during the 2018 Great Indonesia Earthquake(M_(w)7.5)are significant and crucial.The earthquake triggered soil-structure damage due to liquefaction.This study,which thoroughly investigated four sites at Palu,was conducted by performing a comprehensive ground motion parameter analysis.The ground motion characteristics were presented and justified,particularly for the most impacted direction.Ground motion predictions were analysed to define the spectral accelerations,and matching spectral accelerations were conducted to produce ground motions for each site.Non-linear seismic ground response analysis based on the hyperbolic model of pressure pressure-dependent was performed to investigate cyclic soil behaviour.The results revealed that ground motion is crucial in significant soil damage,and the earthquake energy could trigger deep liquefaction.As the most significant ground motion,the vertical ground motion is essential in determining deep liquefaction.The discussion on the impact of liquefaction based on the results of the numerical analysis is presented.Significant ground motion with a longer duration could have a substantial impact on deep liquefaction in the study area.These findings depict how the 2018 Indonesia Earthquake(M_(w)7.5)triggered a mega-liquefaction in Palu City.The results could enhance the understanding of the importance of seismic hazard assessment.It is recommended that site investigation and soil improvement should be planned to counteract liquefaction damage before construction.This study also suggests conducting seismic hazard assessments for city development to minimise the potential disaster impact in the study area.
Lindung Zalbuin Mase;Weeradetch Tanapalungkorn;Suched Likitlersuang;Kyohei Ueda;Tetsuo Tobita
Department of Civil Engineering,Faculty of Engineering,University of Bengkulu,Bengkulu 38371,IndonesiaCentre of Excellence in Geotechnical and Geoenvironmental Engineering,Department of Civil Engineering,Faculty of Engineering,Chulalongkorn University,Bangkok 10330,ThailandCentre of Excellence in Geotechnical and Geoenvironmental Engineering,Department of Civil Engineering,Faculty of Engineering,Chulalongkorn University,Bangkok 10330,Thailand GreenTech Nexus:Research Center for Sustainable Construction Innovation,Faculty of Engineering,Chulalongkorn University,Bangkok 10330,ThailandDisaster Prevention Research Institute,Kyoto University,Kyoto 611-0011,JapanDepartment of Civil,Environmental and Applied System Engineering,Faculty of Environmental and Urban Engineering,Kansai University,Osaka 564-8680,Japan
天文与地球科学
Shallow earthquake(Mw 7.5)Ground motionLiquefactionSpectral matching methodSeismic Hazard AssessmentStructure damage
《China Geology》 2026 (1)
P.152-174,23
The World Class Professor(WCP)Program of the Directorate of Resources,Directorate General of Higher Education,Ministry of Education and Culture in 2023 supports this studythe JAPAN-ASEAN Science and Technology Innovation Platform(JASTIP-WP4)the University of Bengkulu''s International Collaboration Research Fund(2183/UN30.15/LT/2019)for partial fundingthe C2F Fund for Postdoctoral Fellowship from Chulalongkorn Universitythe Thailand Science Research and Innovation Fund Chulalongkorn University(DISF68210001)the National Research Council of Thailand(N42A670572)。
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