Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Lifetime Seismic Risk of Offshore Structures with a Built-in Vibration Control Device

제진장치 설치 해양구조물의 생애주기 지진위험도

  • Kim, Dong-Hyawn (Department of Coastal Construction Engineering, Kunsan National University)
  • 김동현 (군산대학교 해양건설공학과)
  • Received : 2010.04.06
  • Accepted : 2010.10.06
  • Published : 2010.10.31
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Abstract

The analysis of the seismic risk of an offshore structure with a control device is presented. First, a probability density function was developed to represent seismic hazard, and seismic fragility under artificial earthquake conditions was determined. Fragility curves for an offshore structure with both passive and active control devices were determined. Displacement criteria were set to evaluate the performance of the structure. Based on numerical analysis, the seismic risk to the structure was considerably reduced when the structure had a seismic control device. The seismic risk to the actively controlled structure was decreased by 80% compared to the uncontrolled case. Reasonable performance evaluations of offshore structure with control devices can be conducted through risk analysis.

Keywords

References

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