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20世纪60年代以来,流动地基中的桩基础的震害现象和抗震设计受到了工程师和研究者的广泛关注。对侧向流动地基中桩基础的一些典型震害现象和其可能震害原因的归纳和分析,显示目前研究仍不能完全解释侧向流动地基中桩基础的震害现象。选取新泻地震中昭和大桥桩基础破坏案例采用p-y方法进行计算,分析地基侧向流动引起的桩基础破坏的影响因素。计算结果显示,合理地描述液化砂土的p-y曲线模型在侧向流动地基桩基础分析中起到关键作用。对于侧向流动地基中桩基础的震害机制的进一步理解和抗震设计,有赖于更为合理和有效地液化砂土中的p-y模型的发展。
Since the 1960s, seismic damage and seismic design of pile foundations in mobile foundations have drawn the attention of engineers and researchers. Some typical seismic damage phenomena and possible causes of damage to pile foundations in lateral flow foundations can not fully explain the seismic damage of pile foundations in laterally flowing foundations. The p-y method was used to calculate the failure of pile foundation of Showa Bridge in Niigata earthquake, and the influencing factors of pile foundation failure caused by lateral flow were analyzed. The calculated results show that the p-y curve model of liquefied sandy soil can be reasonably described as playing a key role in the analysis of pile foundation of lateral flow foundation. Further understanding and seismic design of the earthquake damage mechanism of pile foundations in laterally flowing ground depends on the more reasonable and efficient development of p-y models in liquefied sandy soils.