서울시 모델 구역 지진피해 추정 연구
A Study on the Seismic Damage Estimation in the Model District of Seoul City
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초록
서울시 모델 구역의 건축물을 대상으로 가상 시나리오 지진에 의한 피해를 추정하였다. 다양한 주거 및 구조 특성을 대표할 수 있고 지반 증폭 효과를 고려할 수 있는 지역을 모델 구역으로 선정하였다. 모델 구역 내 건축물은 구조 형식에 따라 11 종류로 분류하였으며 HAZUS에서 제시한 값을 사용하여 역량 곡선(capacity curve)과 취약도 곡선(fragility curve)을 생성하였다. 가상 시나리오 지진의 지반 운동은 인공 지진 운동 생성 방법을 사용하여 생성하였으며 모델 구역을 표토층 두께에 따라 3개의 구역으로 나누고 지반응답해석을 수행하였다. 건축물의 피해 확률은 역량 스펙트럼 방법과 취약도 곡선을 사용하여 계산하였다. 최종적으로 GIS 데이터베이스를 활용하여 모델 구역 내 건축물의 전반적 피해 정도를 추정하였다.
Abstract
The seismic damage assessment due to the postulated earthquake was attempted for the buildings in the model district of Seoul City. The model district was selected to represent the typical structural and residential characteristics of Seoul City. The buildings in the model district were classified into 11 structural types. For each structural type, the capacity and fragility curves were constructed with parameters presented in HAZUS. The ground motions due to the postulated earthquakes were artificially generated and ground response analyses were done for three kinds of soil profiles classified with respect to the depth of surface soil layer. The probability of damage state of each structural type was calculated using capacity spectrum method and fragility curve. Finally, the calculated results were translated into GIS database and mapped to evaluate the seismic damage in the model district.
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