A Fundamental Study on Dynamic Cross Interaction of Adjacent Structures Supported on Pile Foundations
A Fundamental Study on Dynamic Cross Interaction of Adjacent Structures Supported on Pile Foundations
复制标题
桩基础相邻结构动态交叉相互作用的基础研究
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
H. Adachi
中科院分区：
文献类型：
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作者：
Y. Shimomura;Kaiji Oshima;Y. Ikeda;R. Kondo;Mistukazu Nakanishi;H. Adachi
核电站中密密麻麻地建造了庞大的建筑物，即反应堆、涡轮机和其他建筑物。因此，不仅考虑土与结构之间的动力相互作用效应，而且考虑相邻结构之间的动力相互作用效应，对于详细了解这些建筑的反应是必不可少的。其中一些建筑物可能会因发电厂地盘的泥土情况限制而须以桩基承托。在动力相互作用(DCI)的研究中，邻近结构通常位于土体表面，而与桩基结构动力相互作用相关的研究还很少见。首先，本文提出了考虑相邻结构影响、动力相互作用(DCI)效应的桩基数值分析方案。然后通过对四个模型桩基础的现场水平激励试验进行了数值分析，并进行了讨论。四个桩基模型中的一个在试验中受到水平激振力，并记录了每个基础的响应位移。采用三维薄层土模型，对试验结果进行了模拟分析。无论是直接受激励的基础，还是相邻基础的计算结果，都与试验结果吻合较好。此外，通过与振源所在地基的数值计算结果的比较，发现DCI效应的差异可以忽略不计。最后，进行了考虑DCI影响的地震反应分析。结果表明，与强迫振动试验结果相比，相邻结构的影响对模型地震反应的影响更大。
Massive structures, that is, reactor, turbine and other buildings, have been closely constructed in nuclear power plants. Therefore the consideration of the dynamic interaction effects not only between soil and structure but also among adjacent structures is indispensable to understanding the response of these buildings in detail. Some of these buildings might have to be supported on pile foundations due to the restriction of soil condition at power plant sites and so on. In some studies on the dynamic cross interaction (DCI) the adjacent structures have normally rested on the soil surface, and studies related to DCI of structures supported on pile foundation have been rarely seen. First, this paper proposes the numerical analysis scheme for foundations supported on piles considering with the influence of the adjacent structures, effects of the dynamic cross interaction (DCI). Then some discussions are presented through the numerical analysis of field horizontal excitation tests of four mock-up pile foundations. One of the four pile foundation models has been subjected to horizontal exciting forces in the tests, and the response displacement of each foundation has been recorded. Using the 3-dimensional thin layer soil model, the simulation analysis for the test results has been carried out. The numerical result of the foundations, not only the foundation subjected to excitation directly but also the adjacent foundations, shows a good agreement with the test result. Further, it is found that the difference of the effects of DCI was negligibly small through a comparison with the numerical result of the foundation on which the vibration generator lies. Finally, the earthquake response analysis, which considered the effects of DCI, has been also conducted. It is concluded that the influence of the adjacent structures more strongly affects the response of models subjected to earthquakes than that obtained by forced vibration tests.