An analytical solution for vertical seismic response of an end-bearing pile in saturated soil considering pile-soil and free and scattered field water-soil interaction

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL Marine Structures Pub Date : 2024-07-16 DOI:10.1016/j.marstruc.2024.103677

Piguang Wang , Baoxin Wang , Zhenhua Dong , Xinglei Cheng , Xiuli Du

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Abstract

A mathematical model is proposed to investigate the dynamic behavior of an end-bearing pile under vertical seismic loading in a water-pile-saturated soil system. The model is based on the Euler-Bernoulli beam theory and takes into account the stress balance between pile sections, representing the pile as a one-dimensional rod. The overall response of site is divided into two components: the free-field response and the scattered-field response. The pile and soil are considered as linearly viscoelastic materials with hysteresis-based damping, while water is modeled as a linear acoustic medium. By accounting for boundary conditions involving force equilibrium and displacement continuity at the pile-soil and water-soil interfaces, an analytical solution for the system response is derived. Analytical expressions of pore water pressure and displacements are obtained, on the basis of considering water-soil interaction in both fields. A parameterization study is then conducted to evaluate the impact of key parameters on the vibration characteristics of piles in a water-pile-saturated soil system.

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饱和土中端承桩垂直地震响应的解析解，考虑桩-土以及自由和散射场水-土相互作用

本文提出了一个数学模型，用于研究在水-桩-饱和土体系中，端承桩在垂直地震荷载作用下的动态行为。该模型基于欧拉-伯努利梁理论，考虑了桩截面之间的应力平衡，将桩表示为一维杆。场地的整体响应分为两部分：自由场响应和散射场响应。桩和土被视为具有滞后阻尼的线性粘弹性材料，而水则被视为线性声学介质。通过考虑桩土界面和水土界面的力平衡和位移连续性等边界条件，得出了系统响应的解析解。在考虑两个场中水土相互作用的基础上，得到了孔隙水压力和位移的分析表达式。然后进行了参数化研究，以评估关键参数对水-桩-饱和土系统中桩的振动特性的影响。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.