Abstract In this study, the dynamic response of a concrete-filled tapered Fiber Reinforced polymer (FRP) tube pile, embedded in a transversely isotropic viscoelastic medium, undergoing axial vibration is investigated. The soil adjacent to the pile comprises of an inner nonlinear zone and an outer linear viscoelastic zone. The tapered pile is discretized into small elements, and the displacements and stress compatibilities are reinforced for each element. The interface characteristics and the response of concrete confined with FRP are identified using the collected database of reported test results. An illustration is described to calculate the vertical dynamic response of concrete-filled FRP piles. Parametric estimations of the effects of the taper angle of the pile, degree of transverse isotropy, confining mechanism, and the confining material type are carried out. It is observed that the composite pile comprising of concrete confined with a tube, exhibits resonant amplitude about 4.5% higher, and resonant frequency about 5% higher than the composite pile with concrete confined with wrapping technique. For concrete-filled tapered FRP tube pile with a taper angle of 0.71° the resonant frequency is 19% higher than the resonant frequency of the straight-sided concrete-filled FRP piles.

中文翻译：

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横向各向同性介质中锥形纤维增强聚合物混凝土桩的轴向动力响应

摘要 在这项研究中，研究了嵌入横向各向同性粘弹性介质中的混凝土填充锥形纤维增强聚合物 (FRP) 管桩承受轴向振动的动力响应。与桩相邻的土壤包括内部非线性区域和外部线性粘弹性区域。锥形桩被离散成小单元，每个单元的位移和应力相容性都得到加强。界面特征和 FRP 约束混凝土的响应通过收集到的报告测试结果数据库进行识别。描述了计算填充 FRP 桩的垂直动力响应的插图。桩锥角、横向各向同性程度、约束机制、并进行围护材料类型。观察到，由管约束的混凝土组成的复合桩的共振幅度比用缠绕技术约束的混凝土的复合桩高约 4.5%，共振频率高约 5%。对于锥角为 0.71°的 FRP 混凝土锥形管桩，其共振频率比直边 FRP 混凝土桩的共振频率高 19%。