Analysis on the mechanical properties of TPJ foundation during scour development under different wave and current parameters

IF 5.1 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2025-07-23 DOI:10.1016/j.marstruc.2025.103899

Ning Wang , Ruihu Zhu , Qiming Wang , Siyuan He , Ling Qiu

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引用次数: 0

Abstract

In order to analyse the changes in the mechanical properties of the tetrapod piled jacket (TPJ) foundation under wave-current during scour development, a scour test is conducted in a wave current flume. This test allows for the simultaneous detection of several key parameters, including the scour depth around the pile, the bending moment of the pile, the displacement of the tower top, and the secant stiffness of foundation. The results demonstrate that the scour depth of the upstream piles is greater than that of the downstream piles due to the shading effect of the upstream pile, which results in a 24.7 % greater bending moment in the upstream pile compared to the downstream pile. The correlation coefficient between the accumulated displacement of the tower top and the scour depth is greater than 0.9, indicating a strong correlation between the two variables. An increase in the strength of the current will lead to a significant increase in the accumulated displacement. The secant stiffness of foundation is mainly affected by the wave-induced pore pressure, scour, and cyclic loading.

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不同波流参数下TPJ地基冲刷发展过程力学特性分析

为了分析四足桩夹套地基在波浪流作用下冲刷发展过程中力学性能的变化，在波浪流水槽中进行了冲刷试验。本试验允许同时检测几个关键参数，包括桩周冲刷深度、桩身弯矩、塔顶位移、基础割线刚度。结果表明：由于上游桩的遮阳作用，上游桩的冲刷深度大于下游桩，导致上游桩的弯矩比下游桩大24.7%；塔顶累计位移与冲刷深度的相关系数大于0.9，两者相关性较强。电流强度的增加将导致累积位移的显著增加。基础割线刚度主要受波浪孔隙压力、冲刷和循环荷载的影响。

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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.