Vertical dynamic impedance of pile groups embedded in soils considering the groundwater level

IF 5.6 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Zi Ye, Yonghui Chen, Geng Chen, Jiangwei Shi, Nan Hu, Minguo Lin
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引用次数: 0

Abstract

The groundwater level divides the soils into unsaturated zone and saturated zone, imposing an indispensable effect on the soil–pile interaction behavior. In this work, the groundwater level is introduced into soil–pile group interaction models for advancing the dynamic impedance research of pile groups. The motion equation of pile groups is modeled by the finite element method. The vibration solution of soils considering the groundwater level is solved via the precise integration method, which is utilized as the kernel function to construct the boundary integral equation. The coupled finite element method (FEM) and boundary element method (BEM) establishes the unsaturated soil–pile group interaction equation, which is further solved based on the soil–pile compatibility condition. After confirming the reliability of the above theory, parametric analyses are provided to discuss the effect of a series of key parameters on the impedance function of pile groups.

Abstract Image

Abstract Image

考虑到地下水位,桩群嵌入土壤的垂直动阻抗
地下水位将土壤分为非饱和区和饱和区,对土桩相互作用行为产生不可或缺的影响。本研究将地下水位引入土-桩群相互作用模型,以推进桩群的动力阻抗研究。桩群的运动方程采用有限元法建模。考虑到地下水位的土壤振动解法是通过精确积分法求解的,利用精确积分法作为核函数来构建边界积分方程。耦合有限元法(FEM)和边界元法(BEM)建立了非饱和土-桩群相互作用方程,并根据土-桩相容性条件进一步求解。在证实上述理论的可靠性后,进行了参数分析,讨论了一系列关键参数对桩群阻抗函数的影响。
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来源期刊
Acta Geotechnica
Acta Geotechnica ENGINEERING, GEOLOGICAL-
CiteScore
9.90
自引率
17.50%
发文量
297
审稿时长
4 months
期刊介绍: Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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