Abstract The increasing urban population is leading to the exploitation of building sites close to sources of ground-borne vibration, such as railways and busy roads. Piled foundations can provide a significant vibration transmission path into a building, which can then cause disturbance to occupants and sensitive equipment. There is a strong need to develop numerical models that can capture the essential dynamics of a piled foundation, over the frequency range associated with ground-borne vibration, to help practising engineers decide on appropriate countermeasures. In this paper, a piled foundation is modelled as a pile-group embedded in a homogeneous half-space. Previous research has explored the dynamics of pile-groups to inertial loading at relatively low frequencies, over the seismic range. Here, an iterative approach is developed using a source-receiver boundary-element model to account for the wave-scattering effect that becomes more significant at higher frequencies. Predictions of the dynamic interaction factors, which describe the pile-soil-pile interaction, show very good agreement with a standard boundary-element model for a range of geometric and material parameters. The results show that using uncoupled source-receiver models can account effectively for the interaction between piles without resorting to fully coupled models, even at frequencies well above those of previously published results.

中文翻译：

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桩群中的惯性相互作用：通过迭代波散射方法研究耦合的影响

摘要 城市人口的增加导致对靠近地面振动源的建筑工地的开发，如铁路和繁忙的道路。桩基可以为建筑物提供显着的振动传输路径，然后会对居住者和敏感设备造成干扰。迫切需要开发能够在与地基振动相关的频率范围内捕捉桩基基本动力学的数值模型，以帮助实践工程师决定适当的对策。在本文中，桩基被建模为嵌入均匀半空间的桩组。先前的研究已经探索了桩组在地震范围内相对较低频率下惯性载荷的动力学。这里，使用源-接收器边界元模型开发了一种迭代方法，以说明在较高频率下变得更加显着的波散射效应。描述桩-土-桩相互作用的动力相互作用因子的预测显示与一系列几何和材料参数的标准边界元模型非常吻合。结果表明，使用非耦合源-接收器模型可以有效地解释桩之间的相互作用，而无需求助于完全耦合的模型，即使频率远高于先前公布的结果。显示与一系列几何和材料参数的标准边界元模型非常吻合。结果表明，使用非耦合源-接收器模型可以有效地解释桩之间的相互作用，而无需求助于完全耦合的模型，即使频率远高于先前公布的结果。显示与一系列几何和材料参数的标准边界元模型非常吻合。结果表明，使用非耦合源-接收器模型可以有效地解释桩之间的相互作用，而无需求助于完全耦合的模型，即使频率远高于先前公布的结果。