Dynamic analysis for horizontal vibration of piles in layered Pasternak soils considering secondary ground waves

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2024-10-15 DOI:10.1016/j.soildyn.2024.109026

Yu Xin , Chunyi Cui , Hailong Liu , Benlong Wang , Chengshun Xu , Lina Xu , Guoyang Fu

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引用次数: 0

Abstract

To comprehensively investigate the effects of secondary ground waves (SGWs) induced by the vibration of receiver piles (RPs) in layered soils on the pile-pile horizontal vibration (PPHV), a simplified mechanical model for frequency-domain analysis of PPHV is proposed. This proposed model is based on layered Pasternak soils and elastic Euler-Bernoulli beam theory, incorporating the effects of axial loads and SGW. Firstly, the horizontal displacements (HDs) and the internal forces of the source pile (SP) are obtained using the differential transformation method combined with the continuity boundary conditions (BCs) at the pile-soil interface. Secondly, considering the influence of the vibration of the SP on the RP, a horizontal vibration analysis model for the RP is established, followed by the derivation of an analytical solution for the horizontal dynamic response (HDR). Furthermore, to consider the influence of SGWs induced by the vibration of the RP on the HDR of the SP, an improved analytical solution for the HDR of the RP is obtained. Finally, based on the definition of the dynamic interaction factor, the pile-pile horizontal dynamic interaction factor (PPHDIF) is derived and its rationality is validated by comparisons with existing solutions. Parametric analyses are performed to explore the effects of soil shear deformation, pile-soil modulus ratio, and axial loads on the PPHDIF. The results provide theoretical guidance and references for the dynamic design of pile groups in engineering practice.

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考虑次生地波的帕斯捷尔纳克层状土中桩基水平振动动态分析

为全面研究层状土中接收桩（RPs）振动引起的次生地波（SGWs）对桩-桩水平振动（PPHV）的影响，本文提出了一种用于频域分析 PPHV 的简化力学模型。该模型基于层状帕斯捷尔纳克土和弹性欧拉-伯努利梁理论，并考虑了轴向荷载和 SGW 的影响。首先，利用微分变换法结合桩土界面上的连续性边界条件（BCs）获得源桩（SP）的水平位移（HDs）和内力。其次，考虑到 SP 的振动对 RP 的影响，建立了 RP 的水平振动分析模型，然后推导出水平动力响应 (HDR) 的解析解。此外，为了考虑 RP 振动引起的 SGW 对 SP 的 HDR 的影响，还获得了 RP HDR 的改进分析解。最后，根据动态相互作用系数的定义，得出了桩-桩水平动态相互作用系数（PPHDIF），并通过与现有解决方案的比较验证了其合理性。通过参数分析，探讨了土体剪切变形、桩土模量比和轴向荷载对 PPHDIF 的影响。研究结果为工程实践中的桩群动态设计提供了理论指导和参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.