This study proposes a methodology for the regional seismic risk assessment of structural damage to buildings in Korea based on evaluating individual buildings, considering inconsistency between the administrative district border and grid lines to define seismic hazard. The accuracy of seismic hazards was enhanced by subdividing the current 2km-sized grids into ones with a smaller size. Considering the enhancement of the Korean seismic design code in 2005, existing seismic fragility functions for seismically designed buildings are revised by modifying the capacity spectrum according to the changes in seismic design load. A seismic risk index in building damage is defined using the total damaged floor area considering building size differences. The proposed seismic risk index was calculated for buildings in 29 administrative districts in 'A' city in Korea to validate the proposed assessment algorithm and risk index. In the validation procedure, sensitivity analysis was performed on the grid size, quantitative building damage measure, and seismic fragility function update.

1. 서 론
2. 지역단위 건축물 지진피해 위험도 평가방법
    2.1 건축물 지진피해 위험도 평가지수
    2.2 격자화된 지역별 지반특성
    2.3 건축물 피해 위험도 평가절차
3. 내진설계기준에 따라 차등화된 지진취약도함수
    3.1 기존 지진취약도함수
    3.2 내진설계기준의 변화
    3.3 개선된 지진취약도 함수
4. 건축물피해 위험도 평가예제
    4.1 대상 지역 정보
    4.2 격자크기에 따른 피해율 분석
    4.3 평가지수의 정의에 따른 결과분석
    4.4 지진취약도함수의 영향
5. 결 론
감사의 글

• 안숙진(인천대학교 일반대학원 건축학과 박사과정) | Ahn Sook-Jin (Graduate Student, Department of Architecture, Graduate School, Incheon National University)
• 박지훈(인천대학교 도시건축학부 교수) | Park Ji-Hun (Professor, Division of Architecture and Urban Design, Incheon National University) Corresponding author
• 김혜원(국립재난안전연구원 지진방재센터 시설연구관) | Kim Hye-Won (Senior Research Officer, National Disaster Management Research Institute)