Abstract This study presents a FEM-BEM coupled method to research the dynamic response of a fixed-head pile group in multi-layered transversely isotropic media subjected to transient horizontal loadings. Piles are discretized into finite elements on the basis of Euler-Bernoulli model. Fundamental transient solutions of the media derived by the analytical element method are taken as kernel boundary element functions. Then pile-soil interaction solutions are obtained using the FEM-BEM coupled method. Numerical examples are carried out to confirm the correctness of the theoretical derivation and to discuss further the influence of length-diameter ratio, transversely isotropic characteristics and stratification of the media on the transient horizontal response of the pile group.

中文翻译：

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水平荷载作用下多层横向各向同性介质中固定头桩群的瞬态分析

摘要 本研究提出了一种有限元-边界元耦合方法来研究固定头桩群在多层横向各向同性介质中瞬态水平荷载作用下的动力响应。桩在 Euler-Bernoulli 模型的基础上被离散化为有限元。将解析元法导出的介质基本瞬态解作为核边界元函数。然后使用 FEM-BEM 耦合方法获得桩土相互作用解。通过算例验证了理论推导的正确性，并进一步讨论了长径比、横向各向同性特性和介质分层对桩群瞬态水平响应的影响。