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Non-linear Site Response Analysis of Liquefaction in the Port Area of Bengkulu City Due to Large Subduction Earthquakes
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Non-linear Site Response Analysis of Liquefaction in the Port Area of Bengkulu City Due to Large Subduction Earthquakes
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Journal Article
Non-linear Site Response Analysis of Liquefaction in the Port Area of Bengkulu City Due to Large Subduction Earthquakes
2025
Overview
This paper investigates the liquefaction hazard in the Port Area of Pulau Baai, Bengkulu City, during the large subduction earthquake of 2007. The study was conducted systematically, commencing with a site investigation that included shear wave velocity measurements. Spectral matching and ground motion predictions, based on a relevant attenuation model, were performed to derive representative ground motions for the study sites. Ground response analysis was carried out to examine soil behaviour under seismic loading. Non-linear finite element analysis was utilised to assess dynamic soil characteristics such as excess pore water pressure, shear stress-strain response and stress paths. Additionally, an empirical evaluation was conducted to assess the liquefaction potential. The results indicate that liquefaction at shallow depths could occur, particularly in the first two sand layers. They also suggest that potential seismic damage could range from VII to IX on the Modified Mercalli Intensity (MMI) scale. Both numerical and empirical analyses demonstrated consistent trends and alignment. The comparison of excess pore pressure ratios and safety factors aligns with findings from previous studies. These results underscore the importance of implementing seismic hazard mitigation measures for the study area.
Publisher
Springer US,Springer Nature B.V
