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http://dx.doi.org/10.9720/kseg.2020.4.589

Liquefaction Hazard Assessment according to Seismic Recurrence Intervals Using Simple Estimating Method in Busan City, Korea  

Lim, Hyunjee (Department of Geological Sciences, Pusan National University)
Jeong, Rae-yoon (Department of Geological Sciences, Pusan National University)
Oh, Dongha (Urban Environment Research Lab, Busan Development Institute)
Kang, Hyejin (Department of Geological Sciences, Pusan National University)
Son, Moon (Department of Geological Sciences, Pusan National University)
Publication Information
The Journal of Engineering Geology / v.30, no.4, 2020 , pp. 589-602 More about this Journal
Abstract
As can be seen in many earthquakes, liquefaction causes differential settlement, which sometimes produces serious damages such as building destruction and ground subsidence. There are many possible active faults near the Busan city and the Yangsan, Dongrae, and Ilgwang faults among them pass through the city. The Busan city is also located within the influence of recent earthquakes, which occurred in the Gyeongju, Pohang, and Kumamoto (Japan). Along the wide fault valleys in the city, the Quaternary unconsolidated alluvial sediments are thickly accumulated, and the reclaimed lands with beach sediments are widely distributed in the coastal area. A large earthquake near or in the Busan city is thus expected to cause major damage due to liquefaction in urban areas. This study conducted an assessment of the liquefaction hazard according to seismic recurrence intervals across the Busan city. As a result, although there are slight differences in degree depending on seismic recurrence intervals, it is predicted that the liquefaction potential is very high in the areas of the Nakdonggang Estuary, Busan Bay, Suyeong Bay, and Songjeong Station. In addition, it is shown that the shorter the seismic recurrence interval, the greater difference the liquefaction potential depending on site periods.
Keywords
liquefaction; liquefaction potential index (LPI); hazard assessment; hazard map; seismic recurrence interval;
Citations & Related Records
Times Cited By KSCI : 23  (Citation Analysis)
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