Lifetime Seismic Risk of Offshore Structures with a Built-in Vibration Control Device |
Kim Dong-Hyawn |
Department of Coastal Construction Engineering Kunsan National University |
제진장치 설치 해양구조물의 생애주기 지진위험도 |
김동현 |
군산대학교 해양건설공학과 |
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© 2010 The Korean Society of Ocean Engineers
Open access / Under a Creative Commons License
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Keywords:
Control device, seismic risk, fragility, vibration control, performance evaluation, neuro-control |
핵심용어:
제진장치, 지진위험도, 취약도, 진동제어, 성능평가, 신경망제어 |
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. |
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