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http://dx.doi.org/10.21729/ksds.2019.12.1.45

Seismic Risk Assessment on Buried Electric Power Tunnels with the Use of Liquefaction Hazard Map in Metropolitan Areas  

Baek, Woohyun (Department of civil engineering, Seoul National University of Science and Technology)
Choi, Jaesoon (Department of civil and architecture engineering, Seokyeong University)
Publication Information
Journal of Korean Society of Disaster and Security / v.12, no.1, 2019 , pp. 45-56 More about this Journal
Abstract
In this study, the seismic risk has been evaluated by setting the bedrock acceleration to 0.154g which, was taking into consideration that the earthquake return period for the buried electric power tunnels in the metropolitan area to be 1,000 years. In this case, the risk assessment during the earthquake was carried out in three stages. In the first stage, the site classification was performed based on the site investigation data of the target area. Then, the LPI(Liquefaction Potential Index) was applied using the site amplification factor. After, candidates were selected using a hazard map. In the second stage, risk assessment analysis of seismic response are evaluated thoroughly after the recalculation of the LPI based on the site characteristics from the boring logs around the electric power area that are highly probable to be liquefied in the first stage. The third Stage visited the electric power tunnels that are highly probable of liquefaction in the second stage to compensate for the limitations based on the borehole data. At this time, the risk of liquefaction was finally evaluated based off of the reinforcement method used at the time of construction, the application of seismic design, and the condition of the site.
Keywords
Liquefaction hazard map; Electric power tunnel; Liquefaction potential index; Site response analysis; Risk assessment;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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