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Microzonation on Site-specific Seismic Response at a Model Area in Seoul Using GIS  

Sun, Chang-Guk (한국지질자원연구원 지진연구센터)
Chun, Sung-Ho (서울대학교 공학연구소)
Jang, Eui-Ryong (서울대학교 건설환경공학부)
Chung, Choong-Ki (서울대학교 건설환경공학부)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.7, no.5, 2007 , pp. 139-150 More about this Journal
Abstract
As computer technology has been rapidly advanced, geographic information system (GIS) is recently used in many disciplines. In this study, for a model area in Seoul, seismic hazard potential relating to site effects, which are influenced by the subsurface geotechnical conditions, was estimated using the GIS tool. The distribution of pre-existing borehole drilling data in Seoul metropolitan area was examined for the regional estimation of site-specific seismic responses at the model area. Spatial geo-layers across the entire model area were predicted by constructing a GIS-based geotechnical information system (GTIS). A microzonation of site period $(T_G)$ for estimating site-specific seismic responses at the model area was performed within the GTIS. The spatial microzoning map of $T_G$ indicated seismic vulnerability of two- to four-storied buildings in the model area. Furthermore, a site classification map for determining the design ground motion was established based on the $T_G$ within the GTIS. This informed that most of location in the model area was categorized into current site classes C and D. This seismic microzonation framework for the model area could be applicable particularly in the entire Seoul metropolitan area based on the pre-existing borehole data.
Keywords
site-specific seismic response; site effects; geographic information system; microzonation; geotechnical information;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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