Experimental study of single pile-soil interaction under 
horizontal low-cycle reciprocating displacement

HUANG Fu-yun; CHEN Han-lun; DONG Rui; SHAN Yu-lin

doi:10.16285/j.rsm.2019.0723

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Experimental study of single pile-soil interaction under horizontal low-cycle reciprocating displacement

更新时间：2026-06-25

- Experimental study of single pile-soil interaction under horizontal low-cycle reciprocating displacement
- Vol. 41, Issue 5, Pages: 1625-1634(2020)
- 作者机构：
  
  1. 福州大学土木工程学院福建省工程结构重点实验室,福建,福州,350108
  2. 福州市城乡建设发展有限公司,福建,福州,350007
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2019.0723
  CLC： TU473.1
- Online First：07 July 2020，
  
  Published：2020
- 稿件说明：
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HUANG Fu-yun, CHEN Han-lun, DONG Rui, et al. Experimental study of single pile-soil interaction under horizontal low-cycle reciprocating displacement[J]. 2020, 41(5): 1625-1634.
DOI：

HUANG Fu-yun, CHEN Han-lun, DONG Rui, et al. Experimental study of single pile-soil interaction under horizontal low-cycle reciprocating displacement[J]. 2020, 41(5): 1625-1634. DOI： 10.16285/j.rsm.2019.0723.

摘要

整体式桥台无伸缩缝桥梁（以下简称整体桥）桩基应设计为柔性桩，以保证较好的抗水平变形能力。但是，我国相关规范中判别柔性桩的算法主要应用于单向水平受荷桩，可否沿用至整体桥桩基还有待验证。为此，根据一种特殊设计的桩身变形测量方法，对3根埋深不同的混凝土模型桩进行了低周水平往复位移下的拟静力试验，研究单桩-土体系的抗震性能和相互作用机制。研究表明，水平往复位移下混凝土桩在埋深为3D～6D（D为桩径）范围内开裂；桩的埋深越大，桩身挠曲程度越大、变形特征点位置也越深、桩-土体系的抗弯刚度也越大、水平极限承载力也越高、抗震性能也越强。研究还表明，桩-土体系进入弹塑性阶段后，柔性桩的水平工作性状将逐渐向刚性桩退化。另外，在判别整体桥桩基的水平工作性状时，我国相关规范中的规定偏不安全。实际工程中，建议以Broms方法进行参考计算。

Abstract

To ensure better horizontal deformation resistance

the pile foundation of integral abutment jointless bridges (IAJBs) should be designed as flexible pile. However

the calculation algorithm of flexible pile in relevant codes in China is mainly applied to the laterally loaded pile

and whether it can be used to identify the flexible pile for IAJBs remains a tricky issue to be studied. Therefore

in order to study the aseismic performance and interaction mechanism of the single pile-soil system

three concrete model piles with different lengths were tested under horizontal low-cycle reciprocating displacement based on a specially designed pile deformation measurement method. The result shows that the earliest cracking position of concrete pile is between 3~6 times of pile diameter. The deeper the pile is buried

the better the effect of pile-soil interaction with a deeper location of the deformation characteristic point. Meanwhile

stiffness of pile-soil system

horizontal ultimate bearing capacity and aseismic performance is improved with burial depth increased. The result also indicates that

when the pile-soil system reach the elastoplastic stage

the flexible performance of the pile will gradually degenerate from the elastic pile to the rigid pile. Furthermore

the provisions in relevant codes in China are not safe enough when evaluating the flexural performance of the pile foundation of integral abutment jointless bridges. Hence

it is recommended to use the Broms method for the benchmarking calculation in practical engineering.

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