摘要
近年来海上风电发展迅速,装机容量不断增大,传统单桩基础受荷负担加重,故以单桩基础和安装在桩体外围的桶型基础(摩擦轮)组合而成的复合桩基础被逐渐采用,以保证风机服役期间的安全稳定。为研究复合桩基础承载性能,通过ABAQUS有限元软件开展复合桩基础水平承载性能的研究,分析其相较于传统单桩基础的承载力优势,并进一步进行优化设计。结果表明:相同受荷情况下,复合桩基础由于摩擦轮的存在,桩身泥面处位移和桩身弯矩均大幅减小,水平承载能力明显优于单桩基础;复合桩基础中摩擦轮直径和高度对其水平承载能力影响较明显,但其厚度对复合桩基础水平承载能力影响有限。可见复合桩基础承载能力明显优于单桩。
In recent years, offshore wind power was developed rapidly, and the installed capacity increased continuously, thus the traditional single pile foundation is under heavier load. Therefore, a composite pile foundation composed of single pile foundation and bucket foundation(friction wheel) installed on the periphery of the pile body was adopted gradually to ensure the safety and stability of the fan during the service. To study the bearing capacity of the composite pile foundation, the horizontal bearing capacity of composite pile foundation was studied by ABAQUS finite element software, its bearing capacity advantages over the traditional single pile foundation were analyzed, and further optimization design was carried out. Results show that under the same loading condition, due to the existence of friction wheel, the displacement at the mud surface of pile body and the bending moment of pile body are remarkably reduced, and the horizontal bearing capacity is obviously better than that of single pile foundation. The diameter and height of friction wheel in the composite pile foundation show an obvious influence on the horizontal bearing capacity, while the thickness showes just a limited influence. It is seen that the bearing capacity of the composite pile foundation was obviously better than that of single pile.
作者
孔德森
郭文婷
吴艳崇
KONG De-sen;GUO Wen-ting;WU Yan-chong(Shandong Province Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China;School of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《科学技术与工程》
北大核心
2020年第20期8350-8355,共6页
Science Technology and Engineering
基金
国家自然科学基金(41372288)
山东省自然科学基金(ZR2019MEE027)。
关键词
海上风机
复合桩基础
摩擦轮
有限元分析
水平承载力
offshore wind power
composite pile foundation
friction wheel
finite element analysis
horizontal bearing capacity
