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http://dx.doi.org/10.5000/EESK.2008.12.3.037

Seismic Fragility Analysis of a FCM Bridge Considering Soil Properties  

Kim, Jae-Cheon (인하대학교 토목공학과)
Byeon, Ji-Seok (삼성지구환경연구소)
Shin, Soo-Bong (인하대학교 토목공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.12, no.3, 2008 , pp. 37-44 More about this Journal
Abstract
This study investigates the influence of various soil properties on the seismic performance of a three-span FCM bridge. Piers that are vulnerable to seismic vibration are identified through numerical study of plastic hinges possibly occurring at the top and bottom of the piers. The fragility curve is obtained as a lognormal distribution function with respect to peak ground acceleration(PGA). The median and logarithmic standard deviation, which are two parameters of a lognormal distribution function, are estimated using the maximum likelihood method. In order to consider the different soil properties of each support, an equivalent spring based on the Korean Standard Specifications for Highway Bridges(KSSHB) is adopted in this study. For seismic fragility analysis, the rotational ductility demands of bridge piers are used as a damage index of the structure.
Keywords
soil properties; fragility curve; maximum likelihood method; rotational ductility demand; equivalent spring;
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