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자료유형
학술저널
저자정보
저널정보
한국지진공학회 한국지진공학회 논문집 한국지진공학회논문집 제17권 제3호
발행연도
2013.1
수록면
133 - 141 (9page)

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This paper presents the seismic evaluation and prediction of a damaged piloti‐type Reinforced Concrete (RC) building before and after postretrofitting under successive earthquakes. For considering realistic successive earthquakes, the past records measured at the same station were combined. In this study, the damaged RC building due to the first earthquake was retrofitted with a buckling‐restrained brace (BRB) before the second earthquake occurred. Nonlinear Time History Analysis (NTHA) was performed under the scaled intensity of the successive ground motions. Based on the extensive structural response data obtained form from the NTHA, the fragility relationships between the ground shaking intensity and the probability of reaching a pre‐determined limit state was were derived. In addition, The the fragility curves of the pre‐damaged building without and with the BRBs were employed to evaluate the effect of the successive earthquakes and the post‐retrofit effect. Through the seismic assessment subjected to the successive records, it was observed that the seismic performance of the pre‐damaged building was significantly affected by the severity of the damage from the first earthquake damages and the hysteresis behavior of the retrofit element.

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