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http://dx.doi.org/10.14481/jkges.2019.20.5.5

Correlations of Earthquake Accelerations and LPIs for Liquefaction Risk Mapping in Seoul & Gyeonggi-do Area based on Artificial Scenarios  

Baek, Woohyun (Seoul National University of Science and Technology)
Choi, Jaesoon (Seokyeong University)
Publication Information
Journal of the Korean GEO-environmental Society / v.20, no.5, 2019 , pp. 5-12 More about this Journal
Abstract
On November 15, 2017, a unpredictable liquefaction damage was occurred at the $M_L=5.4$ Pohang earthquake and after, many researches have been conducted in Korea. In Korea, where there were no cases of earthquake damage, it has been extremely neglectable in preparing earthquake risk maps and building earthquake systems that corresponded to prevention and preparation. Since it is almost impossible to observe signs and symptoms of drought, floods, and typhoons in advance, it is very effective to predict the impacts and magnitudes of seismic events. In this study, 14,040 borehole data were collected in the metropolitan area and liquefaction evaluation was performed using the amplification factor. Based on this data, liquefaction hazard maps were prepared for ground accelerations of 0.06 g, 0.14 g, 0.22 g, and 0.30 g, including 200years return period to 4,800years return period. Also, the correlation analysis between the earthquake acceleration and LPI was carried out to draw a real-time predictable liquefaction hazard map. As a result, 707 correlation equations in every cells in GIS map were proposed. Finally, the simulation for liquefaction risk mapping against artificial earthquake was performed in the metropolitan area using the proposed correlation equations.
Keywords
Real-time liquefaction risk map; Liquefaction Potential Index (LPI); Site amplification factor; Earthquake acceleration;
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Times Cited By KSCI : 3  (Citation Analysis)
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