基础(证据)
离心机
海上风力发电
岩土工程
液化
涡轮机
孔隙水压力
浅基础
地质学
地震振动台
土壤液化
刚度
地震荷载
土-结构相互作用
工程类
结构工程
承载力
有限元法
考古
核物理学
物理
历史
机械工程
作者
Xuefei Wang,Xiangwu Zeng,Xu Yang,Jiale Li
出处
期刊:Applied Energy
[Elsevier]
日期:2019-02-01
卷期号:235: 1335-1350
被引量:56
标识
DOI:10.1016/j.apenergy.2018.11.057
摘要
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 keeps 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.
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