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Earthquakes and Structures Volume 13, Number 1, July 2017 , pages 39-50 DOI: https://doi.org/10.12989/eas.2017.13.1.039 |
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Influence of soil-structure interaction on seismic responses of offshore wind turbine considering earthquake incident angle |
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Faria Sharmin, Mosaruf Hussan, Dookie Kim and Sung Gook Cho
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| Abstract | ||
| Displacement response and corresponding maximum response energy of structures are key parameters to assess the dynamic effect or even more destructive structural damage of the structures. By employing them, this research has compared the structural responses of jacket supported offshore wind turbine (OWT) subjected to seismic excitations apprehending earthquake incidence, when (a) soil-structure interaction (SSI) has been ignored and (b) SSI has been considered. The effect of earthquakes under arbitrary angle of excitation on the OWT has been investigated by means of the energy based wavelet transformation method. Displacement based fragility analysis is then utilized to convey the probability of exceedance of the OWT at different soil site conditions. The results show that the uncertainty arises due to multi-component seismic excitations along with the diminution trend of shear wave velocity of soil and it tends to reduce the efficiency of the OWT to stand against the ground motions. | ||
| Key Words | ||
| offshore wind turbine; soil-structure interaction; incident angle; wavelet transformation; fragility curve | ||
| Address | ||
| Faria Sharmin, Mosaruf Hussan, Dookie Kim: Department of Civil Engineering, Kunsan National University, 558 Daehak-ro, Kunsan, Jeonbuk 54150, Republic of Korea Sung Gook Cho: Innose Tech Company Limited, Republic of Korea | ||