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Response of Hybrid Monopile-Friction Wheel Foundation under Earthquake Loading Using Centrifuge Modelling
Offshore wind farms that are constructed in seismic active areas have high requirements for their foundation designs. The earthquake induced soil liquefaction may cause severe damage to the whole structure and consequently influence the operation of wind turbines. Monopile foundation has been widely used currently, and based on this type of foundation, an innovative foundation is proposed. The concept of hybrid monopile-friction wheel foundation is a combination of a monopile and a gravity base, which is regarded as an improved and reinforced design of the original monopile. A series of centrifuge tests was performed to investigate the seismic response of the hybrid foundation system in sandy soil. Two types of hybrid monopile-friction wheel foundations, which contain solid wheel or gravel wheel, were tested, and the results were compared with the original monopile foundation. Accelerations, pore water pressure ratios, and settlements were recorded to illustrate the results. Each tested model exhibited distinct behaviors during the earthquake. It was found that the friction wheel further reinforced the foundation soil, and the liquefaction tendency is lower. The results validate this new concept of offshore wind hybrid foundation systems.
Response of Hybrid Monopile-Friction Wheel Foundation under Earthquake Loading Using Centrifuge Modelling
Offshore wind farms that are constructed in seismic active areas have high requirements for their foundation designs. The earthquake induced soil liquefaction may cause severe damage to the whole structure and consequently influence the operation of wind turbines. Monopile foundation has been widely used currently, and based on this type of foundation, an innovative foundation is proposed. The concept of hybrid monopile-friction wheel foundation is a combination of a monopile and a gravity base, which is regarded as an improved and reinforced design of the original monopile. A series of centrifuge tests was performed to investigate the seismic response of the hybrid foundation system in sandy soil. Two types of hybrid monopile-friction wheel foundations, which contain solid wheel or gravel wheel, were tested, and the results were compared with the original monopile foundation. Accelerations, pore water pressure ratios, and settlements were recorded to illustrate the results. Each tested model exhibited distinct behaviors during the earthquake. It was found that the friction wheel further reinforced the foundation soil, and the liquefaction tendency is lower. The results validate this new concept of offshore wind hybrid foundation systems.
Response of Hybrid Monopile-Friction Wheel Foundation under Earthquake Loading Using Centrifuge Modelling
Wang, Xuefei (Autor:in) / Zeng, Xiangwu (Autor:in) / Li, Xinyao (Autor:in)
Geotechnical Earthquake Engineering and Soil Dynamics V ; 2018 ; Austin, Texas
07.06.2018
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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