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Damage potential has been investigated for a domestic metropolitan railway bridge subjected to 2016 Gyeongju earthquake which has been reported as the strongest earthquake in Korea. For this purpose, nonlinear static pushover analyses for the bridge piers have been carried out to evaluate ductility capacities. Then, the capacities have been compared with those suggested by Railway Design Standards of Korea. This comparison shows that all piers possess enough safety margins. Nonlinear dynamic time-history analysis has also been conducted to estimate both displacement and shear force demands for the bridge subjected to ground motions recorded at stations in near of Gyeongju. Maximum demands reveal that response under the ground motions remains essentially in elastic. In addition, for a further assessment of the bridge under the Gyeongju earthquake, fragility analyses have been performed using those ground motions. The fragility results indicate that the recorded earthquakes do not significantly affect the damage exceedance probability of the bridge piers.
2. 해석대상 교량
3. 해석프로그램 및 모델링 기본가정
3.1 해석프로그램 ZeusNL
3.2 모델링 기본가정
4. 교각의 비선형 정적해석
5. 비선형 동적 시간이력해석
5.1 고유치 해석
5.2 입력지진파 및 응답스펙트럼
5.3 교각의 최대응답
6. 지진취약도 해석
5. 결 론
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