Shaking table test of dynamic response of a single pile under different thicknesses of soft soil layers in a strong earthquake area

ZHANG Cong; FENG Zhong-ju; WANG Fu-chun; KONG Yuan-yuan; WANG Xi-qing; MA Xiao-qian

doi:10.16285/j.rsm.2022.0700

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Shaking table test of dynamic response of a single pile under different thicknesses of soft soil layers in a strong earthquake area

更新时间：2026-06-25

- Shaking table test of dynamic response of a single pile under different thicknesses of soft soil layers in a strong earthquake area
- Vol. 44, Issue 4, Pages: 1100-1110(2023)
- 作者机构：
  
  1. 长安大学公路学院,陕西,西安,710064
  2. 海南省交通规划勘察设计研究院,海南,海口,570203
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2022.0700
  CLC： U443.15
- Online First：29 April 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
ZHANG Cong, FENG Zhong-ju, WANG Fu-chun, et al. Shaking table test of dynamic response of a single pile under different thicknesses of soft soil layers in a strong earthquake area[J]. 2023, 44(4): 1100-1110.
DOI：

ZHANG Cong, FENG Zhong-ju, WANG Fu-chun, et al. Shaking table test of dynamic response of a single pile under different thicknesses of soft soil layers in a strong earthquake area[J]. 2023, 44(4): 1100-1110. DOI： 10.16285/j.rsm.2022.0700.

摘要

为探明不同类型地震波作用下软弱土层差异厚度对单桩动力响应特性的影响，采用振动台试验，开展了不同软弱土层厚度变化下桩基础的加速度、水平位移、弯矩动力响应变化特性及桩基损伤分析。试验结果表明：地震波作用下，桩周土体的约束作用受软弱土层厚度的影响显著。桩身加速度在软弱土层中的放大效果最为显著，桩顶加速度放大系数与软弱土层厚度呈正相关；桩顶水平位移在软弱土层厚度最大时达到最大；桩身弯矩最大值出现在软弱土层中，随其厚度增大而增大。不同土层厚度下，桩身弯矩最大值均小于抗弯能力设计值，桩基完整性较好。桩基础抗震设计计算时，应重点加强桩基础在软弱土层中的抗震能力，并选择多种地震波进行抗震验算。

Abstract

In order to investigate the influence of the different thicknesses of soft soil layers on the dynamic response characteristics of a single pile under different types of seismic waves

the dynamic response characteristics of acceleration

horizontal displacement

bending moment

and pile foundation damage were analyzed by shaking table test. The test results show that under the seismic wave

the restraint behavior of soil around the pile is significantly affected by the thickness of the soft soil layer. The magnifying effect of pile shaft acceleration in soft soil is the most significant. The acceleration magnification factor of the pile top is positively correlated with the thickness of the soft soil layer. The horizontal displacement of the pile top reaches the maximum when the thickness of the soft soil layer is the maximum. The maximal bending moment of the pile appears in the soft soil layer and increases with its thickness. For different soil thicknesses

the maximal bending moment of the pile shaft is less than the design value of bending capacity

and the pile has good integrity. In the seismic design and calculation of pile foundation

the seismic capacity of pile foundation in soft soil layer should be strengthened

and a variety of seismic waves should be selected for seismic checking.

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