Shaking table tests of offshore wind turbine systems with a suction bucket foundation in sandy seabed subject to earthquake and wind loads

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2024-10-09 DOI:10.1016/j.marstruc.2024.103706

Bin Gao , Chong Li , Feilong Zhou , Wenxuan Zhu , Guanlin Ye

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引用次数: 0

Abstract

With the rapid development of offshore wind power industries in China, a significant proportion of existing and planned offshore wind farms are located near seismically active zones with liquefaction potential. Seismic liquefaction threaten the safety of suction bucket foundations supported offshore wind turbines. The shaking table tests for sandy seabed - suction bucket - offshore wind turbine system were carried out under combined wind and earthquake loads. The response of the ground and structure under seismic and wind loads was investigated carefully. The effects of wind load, seismic load, and drainage holes in the top cover of the suction bucket on the dynamic response of this system were obtained. Test results indicate that the increase of peak acceleration results in the increase of seabed, turbine response, excess pore water pressure and wind turbine's rotation. The influence of 2 Hz sine wave on offshore wind turbines is greater than that of 4 Hz. The tilt of the wind turbine under the combined action of wind and earthquake is greater than that under the action of wind load or earthquake alone. Top drainage of the bucket foundation will reduce the seismic capacity of the suction bucket foundation. The research can provide reference for the seismic design of suction buckets for offshore wind turbines.

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在承受地震和风荷载的沙质海床上对带有吸斗基础的海上风力涡轮机系统进行振动台试验

随着中国海上风电产业的快速发展，现有和规划中的海上风电场有相当一部分位于具有液化潜力的地震活跃区附近。地震液化对支撑海上风力涡轮机的吸油桶基础的安全构成威胁。在风荷载和地震荷载的共同作用下，对砂质海床-吸油桶-海上风力涡轮机系统进行了振动台试验。对地面和结构在地震和风荷载下的响应进行了仔细研究。获得了风荷载、地震荷载和吸水桶顶盖排水孔对该系统动态响应的影响。试验结果表明，峰值加速度的增加会导致海床、涡轮机响应、多余孔隙水压力和涡轮机旋转的增加。2 赫兹正弦波对海上风力涡轮机的影响大于 4 赫兹正弦波。风力和地震共同作用下风力涡轮机的倾斜度大于风力荷载或地震单独作用下的倾斜度。吊桶基础顶部排水会降低吸水吊桶基础的抗震能力。该研究可为海上风力涡轮机吸水斗的抗震设计提供参考。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.