Interaction analysis between single pile and multilayered saturated soils under horizontal transient loading

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Engineering Analysis with Boundary Elements Pub Date : 2024-09-21 DOI:10.1016/j.enganabound.2024.105973

Zhi Yong Ai, Lei Xu, Yong Zhi Zhao, Wei Tao Ji

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Abstract

This study employs the coupled finite element-boundary element method to investigate the dynamic response of single pile subjected to horizontal transient loading, which is a common scenario in high-rise building, transportation, and ocean engineering. Firstly, the single pile is modeled as a Timoshenko beam and then discretized with the finite element method (FEM). The transient solution for multilayered saturated soils due to a horizontal load, serving as the kernel function for the boundary element method (BEM), aids in the derivation of the flexibility matrix of the soils. Considering the pile-soil displacement coordination conditions, the coupled FEM-BEM equation is constructed and solved to characterize the pile-soil interaction. Since the pile discretization pattern is applied consistently to the soils, it is more effective than the discretization of infinite domain in the finite element analysis. The validity of the presented method is confirmed through comparison with the full FEM numerical simulations, demonstrating the correctness and enhanced computational efficiency. Finally, parametric studies are carried out to discuss the effects of pile's length-diameter ratio, soil's shear wave velocity and stratification.

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水平瞬态荷载下单桩与多层饱和土的相互作用分析

本研究采用有限元-边界元耦合方法来研究单桩在水平瞬态荷载作用下的动态响应，这是高层建筑、交通和海洋工程中常见的情况。首先，将单桩模拟为 Timoshenko 梁，然后用有限元法（FEM）进行离散化。多层饱和土壤在水平荷载作用下的瞬态解作为边界元法（BEM）的核函数，有助于推导土壤的柔性矩阵。考虑到桩土位移协调条件，构建并求解了 FEM-BEM 耦合方程，以描述桩土相互作用的特征。由于桩的离散模式适用于一致的土壤，因此比有限元分析中的无限域离散更为有效。通过与全有限元数值模拟的比较，证实了所介绍方法的有效性，证明了其正确性和更高的计算效率。最后，还进行了参数研究，讨论了桩的长径比、土的剪切波速度和分层的影响。

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.