Transient Analysis of a Poroelastic Soil Layer Due to Horizontal Movement of a Rigid Disk Attached on the Layer With a Relaxed Boundary Condition

IF 3.4 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Xinjun Zou, Zijian Yang, Minhua Zhou, Lanyi Huang
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Abstract

This paper is concerned with the study of a poroelastic soil layer under impulsive horizontal loading. Building upon Biot's general theory of poroelasticity, a comprehensive set of governing equations addressing three‐dimensional transient wave propagation problem are established. Explicit general solutions for displacements and pore‐pressures are derived by employing a sophisticated mathematical approach, incorporating decoupling transformation, Fourier series expansion, and Laplace–Hankel integral transform techniques. Subsequently, physical‐domain components are numerically obtained by an enhanced Durbin method coupled with inverse Hankel transform. Comparisons the existing transient solutions for the ideal elastic half‐space are made to validate the proposed formulations' reliability and precision. Through representative analyses for time‐domain results, it is illustrated to study the influence of the soil thickness and types of loading pulse on the transient dynamic response of finite‐thickness poroelastic soil layers. The results in comparative analysis show that the magnitudes of the horizontal displacement and pore water pressure can be affected and become more fluctuant when the thickness of the poroelastic soil layer decreases. The basic solutions may be attributed to a variety of wave propagation problems due to transient dynamic loading and illustrate the corresponding distinct wave features elegantly.
边界松弛条件下附着在孔弹性土层上的刚性盘水平运动的瞬态分析
本文研究了脉冲水平荷载作用下的孔弹性土层。在Biot多孔弹性理论的基础上,建立了一套完整的三维瞬态波传播控制方程。通过采用复杂的数学方法,结合解耦变换、傅立叶级数展开和拉普拉斯-汉克尔积分变换技术,推导出位移和孔隙压力的显式一般解。在此基础上,利用增强的Durbin方法和Hankel逆变换对物理域分量进行了数值计算。通过与已有的理想弹性半空间瞬态解的比较,验证了所提公式的可靠性和精度。通过具有代表性的时域结果分析,说明了土体厚度和加载脉冲类型对有限厚度孔弹性土层瞬态动力响应的影响。对比分析结果表明,随着孔弹性土层厚度的减小,水平位移和孔隙水压力的大小会受到影响,且波动更大。基本解可以归结为各种由瞬态动荷载引起的波传播问题,并优雅地说明了相应的不同波特征。
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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