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A platform for research: civil engineering, architecture and urbanism
Centrifuge modeling of offshore wind foundations under earthquake loading
https://orcid.org/0000-0003-0235-3793
Abstract The construction of large offshore wind turbines in seismic active regions has great demand on the design of foundations. The occurrence of soil liquefaction under seismic motion will affect the stability of the foundations and consequently the operation of the turbines. In this study, a group of earthquake centrifuge tests was performed on wind turbine models with gravity and monopile foundations, respectively, to exam their seismic response. It was found that the seismic behavior of models was quite different in the dry or saturated conditions. Each type of foundation exhibited distinct response to the earthquake loading, especially in the offshore environment. In the supplementary tests, several remediation methods were evaluated in order to mitigate the relatively large lateral displacement of pile foundation (by fixed-end pile and multi-pile foundation) and excessive settlement of gravity foundation (by densification, stone column, and cementation techniques).
Highlights A group of centrifuge tests were conducted on the offshore wind turbine models with different foundations. Seismic responses of wind turbines and soil were reported and some remediation techniques were studied. Each foundation has its own benefits and limitations under earthquake loading. The remediation techniques exhibited great effectiveness in reducing seismic-induced instability.
Centrifuge modeling of offshore wind foundations under earthquake loading
https://orcid.org/0000-0003-0235-3793
Abstract The construction of large offshore wind turbines in seismic active regions has great demand on the design of foundations. The occurrence of soil liquefaction under seismic motion will affect the stability of the foundations and consequently the operation of the turbines. In this study, a group of earthquake centrifuge tests was performed on wind turbine models with gravity and monopile foundations, respectively, to exam their seismic response. It was found that the seismic behavior of models was quite different in the dry or saturated conditions. Each type of foundation exhibited distinct response to the earthquake loading, especially in the offshore environment. In the supplementary tests, several remediation methods were evaluated in order to mitigate the relatively large lateral displacement of pile foundation (by fixed-end pile and multi-pile foundation) and excessive settlement of gravity foundation (by densification, stone column, and cementation techniques).
Highlights A group of centrifuge tests were conducted on the offshore wind turbine models with different foundations. Seismic responses of wind turbines and soil were reported and some remediation techniques were studied. Each foundation has its own benefits and limitations under earthquake loading. The remediation techniques exhibited great effectiveness in reducing seismic-induced instability.
Centrifuge modeling of offshore wind foundations under earthquake loading
https://orcid.org/0000-0003-0235-3793
Abstract The construction of large offshore wind turbines in seismic active regions has great demand on the design of foundations. The occurrence of soil liquefaction under seismic motion will affect the stability of the foundations and consequently the operation of the turbines. In this study, a group of earthquake centrifuge tests was performed on wind turbine models with gravity and monopile foundations, respectively, to exam their seismic response. It was found that the seismic behavior of models was quite different in the dry or saturated conditions. Each type of foundation exhibited distinct response to the earthquake loading, especially in the offshore environment. In the supplementary tests, several remediation methods were evaluated in order to mitigate the relatively large lateral displacement of pile foundation (by fixed-end pile and multi-pile foundation) and excessive settlement of gravity foundation (by densification, stone column, and cementation techniques).
Highlights A group of centrifuge tests were conducted on the offshore wind turbine models with different foundations. Seismic responses of wind turbines and soil were reported and some remediation techniques were studied. Each foundation has its own benefits and limitations under earthquake loading. The remediation techniques exhibited great effectiveness in reducing seismic-induced instability.
Centrifuge modeling of offshore wind foundations under earthquake loading
Yu, Hao (author) / Zeng, Xiangwu (author) / Li, Bo (author) / Lian, Jijian (author)
Soil Dynamics and Earthquake Engineering ; 77 ; 402-415
2015-06-25
14 pages
Article (Journal)
Electronic Resource
English
Centrifuge modeling of offshore wind foundations under earthquake loading
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