Seismic fragility analysis of a structure is generally performed for the expected critical component of a structure. The seismic fragility analysis assumes that all the components behave independently in a structural system. A bridge system consists of many inter-connected components. Thus, for an accurate evaluation of the seismic fragility of a bridge, the seismic fragility analysis requires the composition of probabilities considering the correlation between structural components. This study presented a procedure to obtain the seismic fragility curve of a bridge system, considering the correlation between bridge components. Seismic fragility analysis was performed on a PSC bridge that is considered as the central infrastructure. The analysis results showed that the probability of the seismic fragility curve of the bridge system was higher than that of each bridge component.

A B S T R A C T
1. 서 론
2. 시스템 지진취약도 분석 절차
3. 해석모델
    3.1 대상 교량 제원
    3.2 비선형 동적해석을 위한 수치해석 모델링
4. PSC 교량의 비선형 동적해석을 통한 부재 지진취약도 분석
    4.1 지진하중
    4.2 교량의 비선형 동적해석
    4.3 교량 부재별 한계상태 정의
    4.4 교량 부재 지진취약도 분석
5. PSC 교량의 시스템 지진취약도 곡선 도출
    5.1 교량 부재간 상관관계 분석 및 JPSDM 작성
    5.2 상관관계를 고려한 교량 시스템 지진취약도 분석
6. 결 론
REFERENCES

• 안효준(인하대학교 토목공학과) | An Hyojoon (Department of Civil Engineering, Inha University)
• 신수봉(인하대학교 토목공학과) | Shin Soobong (Department of Civil Engineering, Inha University)
• 이종한(인하대학교 토목공학과) | Lee Jong-Han (Department of Civil Engineering, Inha University) Corresponding author