筒型基础预应力过渡段结构传力特性研究

RESEARCH ON FORCE TRANSMISSION CHARACTERISTICS OF PRESTRESSED TRANSITION STRUCTURE OF BUCKET FOUNDATION

复合筒型基础是目前应用于海上风电工程中的一种新型基础型式,过渡段结构作为一种连接筒基和塔筒的结构形式在整个基础结构的传力体系中起到关键作用。基于大型有限元软件ABAQUS,建立2种典型的过渡段结构型式,具体分析不同过渡段结构在单调荷载及复合荷载作用下过渡段结构的应力响应及传力特性。计算结果表明:单调水平或竖向荷载作用下,带分舱板的钢筒直线型过渡段模型受力均匀,过渡段结构表现出更好的综合传力特性;单调弯矩荷载作用下,带分舱板的钢筒弧线型过渡段模型受力均匀,过渡段结构表现出更好的综合传力特性;复合荷载作用下,带分舱板的钢筒弧线型过渡段模型受力性能最好,过渡段结构的传力性能最优。

The composite bucket foundation in a new type of foundation for offshore wind engineering. Transition sectionbetween the tower and bucket foundation play a key role in the foundation transition system. Based on the large finiteelement software ABAQUS,two kinds of typical transition section in bucket foundation were setting up to research on theresponse of stress and transmission mechanism of force on the monotone ultimate load condition and composite loadingcase. The results showed that the linear transition section in steel bucket foundation with bulkheads is uniformly forcedand shows a better force transmission characteristic under the monotonic horizontal or vertical load. Under the monotonicbending load,the arc-transition section in steel bucket foundation with bulkheads is uniformly forced and shows a betterforce transmission characteristic. Under composite load,the arc-transition section in steel bucket foundation withbulkheads is uniformly forced and shows a better force transmission characteristic.