This paper investigates the effect of a nodular segment, commonly found in nodular piles, on the dynamic response of a vertical vibrating tubular pile. A developed model of a tubular pile, discretized by variable sections and pile–surrounding soil layers, is established to analyze the pile dynamic response. The components of a nodular segment are then discussed independently, while the accuracy of the developed solution is verified using finite element analysis and a low-strain test on site. The validated solution is employed to conduct a parametric study of a nodular segment under the condition of the low-strain test. Some conclusions derived from this study are utilized to provide practical guidance for engineering practice.

中文翻译：

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结节段对管桩纵向振动动力响应的影响

本文研究了通常在根瘤桩中发现的根瘤节段对垂直振动管桩的动力响应的影响。建立了一个由可变截面和桩周围土层离散化的管状桩模型，以分析桩的动力响应。然后独立讨论结节段的组成部分，同时使用有限元分析和现场低应变测试来验证所开发解决方案的准确性。经过验证的解决方案用于在低应变测试条件下对节状节段进行参数研究。这项研究得出的一些结论可为工程实践提供实践指导。