【摘要】 在传统钢管桩内加装约束盘(单孔、四孔)的单桩基础是一种新型的海上风机单桩钢管基础。为了掌握加装约束盘的桩基础水平承载性能的变化规律,通过自主设计加工的水平加载装置,对传统开口、闭口单桩基础及加装不同约束盘类型的新型单桩基础进行了一系列离心机模型试验,研究了不同桩型在极限状态下的水平承载特性。利用ABAQUS有限元分析软件进行数值建模,研究了新型单桩基础和传统单桩基础在水平荷载作用下的破坏模式,揭示了桩身旋转中心的变化规律。结果表明,加装约束盘的新型单桩基础在刚度和强度方面表现出较好的稳定性;相对传统的单桩基础加装约束盘之后基础的水平极限荷载有显著的提高。更多还原

【Abstract】 The single pile foundation with restraint plates(single hole,four holes) installed inside the traditional steel pipe piles is a new type of foundation for offshore wind turbines. In order to study the lateral bearing mechanism of the innovative pile foundation with restraint plates,a lateral loading system is specially designed in the centrifuge. A series of centrifuge tests are conducted with the traditional piles and the piles with restraint plates under ultimate conditions. The finite element model is developed in ABAQUS and validated against the test results to study the failure modes of the piles. The evolution of the rotation center on the piles are revealed in the numerical analysis. The results show that the innovative piles with restraint plates demonstrate a better stability in terms of stiffness and strength. The lateral capacities are significantly enhanced by adding the restriction plates.更多还原