CAJ | 학술논문

针对单桩基础侧向刚度不足的情况，为提高单桩基础的适用性，提出了一种以单桩为主、导管支架为辅的新型复合风电基础。利用有限元软件ABAQUS，以3 MW风机基础为研究对象，创建有限元模型，模拟单桩基础和新型复合风电基础的受力，分别在粉砂和粉质粘土2种地质情况下，分析该新型复合基础的受力；以导管支架三根结构桩的直径及入土深度为变量，研究复合风电基础中的主桩应力及水平度的变化情况。计算结果表明：随着结构桩直径或入土深度的增加，复合风电基础中导管支架上部主桩应力基本保持不变，而主桩与泥面接触处应力和主桩水平度明显减小；其中，结构桩的入土深度增加时，用钢量的增幅较小，而主桩与泥面接触处应力和主桩水平度的减幅较大，这为结构的优化设计提供参考依据。
침대단장기출측향강도불족적정황，위제고단장기출적괄용성，제출료일충이단장위주、도관지가위보적신형복합풍전기출。이용유한원연건ABAQUS，이3 MW풍궤기출위연구대상，창건유한원모형，모의단장기출화신형복합풍전기출적수력，분별재분사화분질점토2충지질정황하，분석해신형복합기출적수력；이도관지가삼근결구장적직경급입토심도위변량，연구복합풍전기출중적주장응력급수평도적변화정황。계산결과표명：수착결구장직경혹입토심도적증가，복합풍전기출중도관지가상부주장응력기본보지불변，이주장여니면접촉처응력화주장수평도명현감소；기중，결구장적입토심도증가시，용강량적증폭교소，이주장여니면접촉처응력화주장수평도적감폭교대，저위결구적우화설계제공삼고의거。
In view of the lack of lateral stiffness of the monopile and in order to improve the applicability of it, this paper proposes a new wind turbine foundation which is based on a monopile and supplemented by a jacket founda-tion. By using the general finite element program ABAQUS, and taking the 3 MW turbine foundation as the research object, a finite element model is created to simulate the stress process of the monopile and the new composite foun-dation respectively in the sandy and silt-filled clay soil, and analyze the new composite foundation stress;and using the diameter and depth of the three structural-piles of the jacket as variables, the stress and the levelness variation of the new composite foundation are researched. The calculation results show that:with the structural-pile's diame-ter and depth increasing, the stress of the main pile above the jacket in the new composite foundation is basically unchanged, but the stress of the pile next to the surface and the levelness of the pile are obviously reduced; and with the depth increasing, the increase of the steel consumption amount is smaller, but the stress of the main pile next to the soil surface and the levelness of the pile are reduced to a great extent. These findings will provide some reference for structural optimization.