Lateral kinematic properties of offshore pipe piles embedded in saturated soil considering soil plug effect

IF 3.4 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Jiaxuan Li, Xiaoyan Yang, Hao Liu, Libo Chen, Wenbing Wu, M. Hesham El Naggar, Dagang Lu
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引用次数: 0

Abstract

This study establishes a theoretical framework for analyzing the lateral oscillation of marine pipe piles. The additional mass model is introduced herein to consider the inertial fluctuation effect of the soil plug. Analytical mathematical methods are used to determine the complex impedance variation of the pile over a range of frequency effects. An investigation is performed to determine how the presence of soil plugs changes the lateral complex stiffness and natural frequency of pipe piles. Additionally, comparisons of the applicability of the plane strain model and continuous medium model have been conducted to enable the easy use of the theoretical model. The main conclusions can be drawn as (1) if the fluctuation inertia effect of the soil plug is not taken into consideration, the dynamic active length and the dynamic stiffness of the pipe pile will be underestimated; (2) for the soft soil, the plane strain model may give rise to substantial calculation errors attributed to them regardless of the vertical continuity of the soil, nevertheless, the calculation error decreases rapidly with the increase of soil shear modulus and vibration frequency.

考虑土塞效应的饱和土壤中嵌入的近海管桩的横向运动特性
本研究为分析海洋管桩的横向振荡建立了一个理论框架。本文引入了附加质量模型,以考虑土塞的惯性波动效应。分析数学方法用于确定桩在一系列频率效应下的复阻抗变化。通过研究确定土塞的存在如何改变管桩的横向复刚度和固有频率。此外,还对平面应变模型和连续介质模型的适用性进行了比较,以便于使用理论模型。得出的主要结论有:(1)如果不考虑土塞的波动惯性效应,管桩的动活度长度和动刚度将被低估;(2)对于软土,无论土的垂直连续性如何,平面应变模型都可能产生较大的计算误差,但计算误差会随着土的剪切模量和振动频率的增加而迅速减小。
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
CiteScore
6.40
自引率
12.50%
发文量
160
审稿时长
9 months
期刊介绍: The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.
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