Simplified approximate approach to dynamic interaction between a cluster of piled structures
Simplified approximate approach to dynamic interaction between a cluster of piled structures
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DOI：
10.1007/s10518-023-01743-6
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发表时间：
2023-08
影响因子：
4.6
通讯作者：
Hong-lan Zou;Feng Xiong;Yang Lu;Huiqun Yan
中科院分区：
文献类型：
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作者：
Hong-lan Zou;Feng Xiong;Yang Lu;Huiqun Yan
城市中密集分布的建筑物和场地之间的地震相互作用，称为场地-城市相互作用（SCI），对于城市破坏评估和减灾具有重要意义。过去对SCI效应的研究主要集中在表面或浅埋基础上的结构。有必要建立一个简单的动力模型来分析桩结构的相互作用，以便将软土上的高层建筑纳入SCI分析。本研究探讨了考虑SCI效应的桩基结构间的相互作用。首先，分析模型，提出了模拟相邻桩结构之间的动力相互作用理想化为简单的振荡器上的桩。然后，SCI的影响进行了量化，通过频率响应分析，使用一些参数，包括桩土刚度比，结构桩质量比，结构间距，桩细长。结果表明，SCI效应可以放大或减小桩和结构的位移和内力幅值，在某些情况下，可以显着突出。该模型可用于预测城市建筑群中桩基的SCI效应，为此类建筑群的前期设计提供参考。
Seismic interaction between densely distributed buildings and sites in cities, known as site-city interaction (SCI), can be momentous for urban damage assessment and mitigation. Past studies on SCI effects have mainly focused on structures on surface or shallow-embedded foundations. There is a need for a simple dynamic model for analyzing the interaction of piled structures so that high-rise buildings on soft soils can be included in an SCI analysis. This study addresses the interaction between piled structures considering SCI effects. First, analytical models are proposed to simulate dynamic interactions between adjacent piled structures idealized as simple oscillators on monopiles. Then, SCI effects are quantified through frequency response analyses using a number of parameters, including pile-soil stiffness ratio, structure-pile mass ratio, structural spacing, and pile slenderness. It is shown that SCI effects can amplify or reduce displacement and internal force amplitudes of piles and structures and, in some cases, could be significantly prominent. The proposed models can be used to predict SCI effects in urban building clusters involving pile foundations, which provides a reference for designing these buildings at a preliminary stage.