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首页> 外文期刊>International journal of geotechnical engineering >Effects of soil nonlinearity and liquefaction on seismic response of pile groups
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Effects of soil nonlinearity and liquefaction on seismic response of pile groups

机译：土的非线性和液化对群桩地震反应的影响

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The seismic behavior of pile groups is very complicated if piles are passing through liquefiable soil. In this paper, the effects of soil nonlinearity and liquefaction on seismic response of pile groups are investigated. A three-dimensional finite element soil-pile model was developed with Kelvin elements for simulating radiation conditions at infinity. The effect of soil nonlinearity was investigated considering work-hardening plastic cap model for the soil. The liquefaction of the soil medium was simulated using two parameter volume change model.Seismic responses of a single pile and pile groups were examined considering soil nonlinearity and liquefaction. The study was performed for range of frequency of excitation. Finally analysis is carried out for real time earthquake motion. A significant effect of soil nonlinearity and liquefaction of the soil medium on the seismic response of pile groups was observed and it was also noticed that this effect is very much dependent on peak ground acceleration and frequency characteristics of the input motion.
机译：如果桩穿过可液化土壤，桩组的抗震性能将非常复杂。本文研究了土壤非线性和液化对群桩地震反应的影响。利用开尔文单元建立了三维有限元土桩模型，用于模拟无限远处的辐射条件。考虑工作硬化的塑料盖模型，研究了土壤非线性的影响。使用两个参数的体积变化模型模拟了土壤介质的液化。考虑了土壤的非线性和液化作用，研究了单桩和桩组的地震反应。对激励频率范围进行了研究。最后对实时地震运动进行了分析。观察到土壤非线性和土壤液化对桩组地震响应的显着影响，并且还注意到该影响在很大程度上取决于峰值地面加速度和输入运动的频率特性。

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