Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modelling

Wang, Xuefei; Zeng, Xiangwu; Yang, Xu; Li, Jiale

doi:10.1016/j.apenergy.2018.11.057

Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modelling

Journal Article · Mon Nov 26 00:00:00 EST 2018 · Applied Energy

DOI:https://doi.org/10.1016/j.apenergy.2018.11.057· OSTI ID:1613382

Wang, Xuefei ^[1]; Zeng, Xiangwu ^[2]; Yang, Xu ^[2]; Li, Jiale ^[2]

Hebei Univ. of Technology, Tianjing (China); Case Western Reserve Univ., Cleveland, OH (United States); DOE/OSTI
Case Western Reserve Univ., Cleveland, OH (United States)

Some large capacity offshore wind turbines are constructed in seismically active areas. The occurrence of soil liquefaction during an earthquake can result in severe failures of the offshore wind turbine. The seismic response of the structure and the failure mechanism of the soil-structure interactions are necessary to investigate. In this study, the seismic response of an innovative hybrid monopile foundation is investigated through a series of centrifuge tests. The seismic performance of the combined system of the superstructure, foundation, and soil are demonstrated. Five hybrid foundation models are tested by considering the influence of the foundation thicknesses and diameters, and a monopile foundation is tested for comparison. Centrifuge test results reveal that the hybrid monopile foundation is effective in reducing the lateral displacement during the shaking. In the saturated condition, soil maintains its strength and stiffness beneath and adjacent to the foundation. The hybrid foundation system tends to settle more due to the larger shear stress caused by the soil structure interactions. Influences of the wheel specifications are illustrated. The foundations with larger thicknesses lead to smaller lateral displacements and lower tendencies of liquefaction, but the settlements are intensified. The larger diameter foundation provides a longer drainage path for the excess pore water pressure. With a similar weight, the structure settles less during the earthquake.

View Accepted Manuscript (DOE)

Research Organization:: Lake Erie Energy Development Organization, Cleveland, OH (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0006714

OSTI ID:: 1613382

Alternate ID(s):: OSTI ID: 1636432

Journal Information:: Applied Energy, Journal Name: Applied Energy Journal Issue: C Vol. 235; ISSN 0306-2619

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Figure 9: Part 1(p. 20)

Figure 9: Part 2(p. 21)

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Centrifuge modelling
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Seismic response of offshore wind turbine with hybrid monopile foundation based on centrifuge modelling

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Cited By (1)

Figures / Tables (21)

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