| Title |
Seismic Fragility Analysis of a RC Bridge Including Earthquake Intensity Range |
| Authors |
이도형(Lee, Do Hyung) ; 정현도(Jeong, Hyeon Do) ; 김병화(Kim, Byeong Hwa) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.5.0635 |
| Keywords |
지진취약도 해석;지진강도 범위;철근콘크리트 교량;손상한계상태;수평변위비 Seismic fragility analysis;Earthquake intensity range;RC bridge;Damage limit state;Lateral drift ratio |
| Abstract |
In the present study, influence of earthquake intensity range on seismic fragility analysis of a RC bridge has been evaluated. For this purpose, a RC bridge damaged by a past earthquake has been selected, and analytical model of the bridge has been developed for nonlinear dynamic time-history analysis. A total of 25 recorded earthquake motions have been employed for the nonlinear analysis from which maximum lateral drift ratio of piers are obtained. Then, seismic fragility analysis has been conducted for the bridge using the nonlinear analysis results. Probability of exceeding damage has been computed in terms of using the maximum likelihood estimation, and effect of earthquake intensity range of the motions on seismic fragility curves has been assessed analytically. Analytical predictions indicate that the earthquake intensity range is of utmost significance for rationale seismic fragility analysis reflecting a physical damage state of a bridge and seismic performance evaluation of such bridge. |