TY - JOUR
T1 - Centrifuge modeling of offshore wind foundations under earthquake loading
AU - Yu, Hao
AU - Zeng, Xiangwu
AU - Neff, Frank H.
AU - Li, Bo
AU - Lian, Jijian
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - 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).
AB - 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).
KW - Cementation
KW - Centrifuge test
KW - Densification
KW - Foundation
KW - Liquefaction
KW - Liquefaction mitigation technique
KW - Offshore wind turbine
KW - Seismic response
KW - Stone column
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U2 - 10.1016/j.soildyn.2015.06.014
DO - 10.1016/j.soildyn.2015.06.014
M3 - Article
AN - SCOPUS:84937035038
SN - 0267-7261
VL - 77
SP - 402
EP - 415
JO - Soil Dynamics and Earthquake Engineering
JF - Soil Dynamics and Earthquake Engineering
ER -