液化土中桩基础动力反应试验研究

Study on dynamic response of pile in liquefied soil layer

本文设计完成了包括三种密度饱和砂土和非液化干砂的多工况桩-土相互作用振动台动力试验,研究液化对土体和桩-承台动力反应的影响。通过试验和分析,得到了液化和非液化土层中土体水平加速度、侧向位移和桩-承台的水平加速度、侧向位移、桩身弯矩等指标的反应过程和模式,对比了液化和非液化条件对这些指标的影响方式,提出了各因素影响大小的分析结果。

The multi-case shaking table tests of a pile in the liquefied and non-liquefied sand layers are conducted to investigate the effect of liquefaction on the dynamic response of soil and pile. The time dependent processes of the horizontal acceleration, the lateral displacement of soil and pile as well as the bending moment of pile in liquefied and non-liquefied sand layers are obtained. Comparisons of the effect of liquefied and non-liquefied soil layer on these factors are made and the results of parameter analysis are presented.