Response of Hybrid Monopile-Friction Wheel Foundation under Earthquake Loading Using Centrifuge Modelling

Xuefei Wang, Xiangwu Zeng, Xinyao Li

Research output: Contribution to journalConference articlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)445-453
Number of pages9
JournalGeotechnical Special Publication
Volume2018-June
Issue numberGSP 292
DOIs
StatePublished - 2018
Event5th Geotechnical Earthquake Engineering and Soil Dynamics Conference: Numerical Modeling and Soil Structure Interaction, GEESDV 2018 - Austin, United States
Duration: 10 Jun 201813 Jun 2018

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