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논문 기본 정보

자료유형
학술저널
저자정보
김병모 (한국해양대학교) 김찬영 (한국해양대학교) 이진학 (한국해양과학기술원)
저널정보
한국연안방재학회 한국연안방재학회지 한국연안방재학회지 제6권 제3호
발행연도
2019.1
수록면
103 - 110 (8page)

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초록· 키워드

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In order to study oceanic environmental changes affecting the climate change and global warming, the Korean government supports the construction and operation of several ocean research stations (ORS) such as Ieodo ORS, Gageocho ORS and Sochengcho ORS in remote area. Among these ORSs, the Gageocho ORS was directly attacked by Typhoon Muifa in 2011 and its structural members were severely damaged. After this structural failure, the Gageocho ORS was rehabilitated and instrumented with dynamic measurement system. In this study, the preliminary finite element (FE) model of the repaired Gageocho ORS was updated using the natural frequencies estimated by the measurement. Mass reallocation method and the pattern search method were utilized for the FE model updating. The former was applied to rationally redistribute the lumped mass ignored in static analysis in platform and the latter was used to obtain the optimal values for mass redistribution as well as other material properties such as an elastic modulus of concrete. This significantly reduced the errors of natural frequencies for the estimated values by under 1% from larger than 15% in the preliminary FE model. The updated baseline FE model can be useful for further performance analysis including reliability analysis, wave and seismic analysis, and also for structural health monitoring.

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