Centrifugal model tests on lateral cyclic loading behavior 
of large-diameter monopiles in soft clay

GAO Lu-chao; DAI Guo-liang; ZHANG Ji-sheng; WAN Zhi-hui; YAO Zhong-yuan; WANG Yang

doi:10.16285/j.rsm.2023.1503

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Centrifugal model tests on lateral cyclic loading behavior of large-diameter monopiles in soft clay

更新时间：2026-06-25

- Centrifugal model tests on lateral cyclic loading behavior of large-diameter monopiles in soft clay
- Vol. 45, Issue 8, Pages: 2411-2420(2024)
- 作者机构：
  
  1. 华能国际电力江苏能源开发有限公司清洁能源分公司,江苏,南京,210003
  2. 河海大学海岸灾害及防护教育部重点实验室,江苏,南京,210098
  3. 东南大学土木工程学院,江苏,南京,211189
  4. 南京工业大学交通运输工程学院,江苏,南京,211816
  5. 山东理工大学建筑工程与空间信息学院,山东,淄博,255000
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.1503
  CLC： TU473.1
- Online First：12 August 2024，
  
  Published：2024
- 稿件说明：
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GAO Lu-chao, DAI Guo-liang, ZHANG Ji-sheng, et al. Centrifugal model tests on lateral cyclic loading behavior of large-diameter monopiles in soft clay[J]. 2024, 45(8): 2411-2420.
DOI：

GAO Lu-chao, DAI Guo-liang, ZHANG Ji-sheng, et al. Centrifugal model tests on lateral cyclic loading behavior of large-diameter monopiles in soft clay[J]. 2024, 45(8): 2411-2420. DOI： 10.16285/j.rsm.2023.1503.

摘要

为研究软黏土中大直径单桩水平循环受荷响应，开展了不同循环加载形式（单向和双向）下软黏土中大直径单桩离心模型试验，对比分析了大直径单桩变形特性、刚度弱化、桩身弯矩、循环p-y曲线以及桩周孔隙水压力变化规律。试验结果表明：单桩荷载-位移曲线表现出明显的非线性滞回耗能与位移累积特性，相比单向循环，双向循环引起桩顶产生较大的累积位移，累积位移与循环次数和加载幅值有关；桩顶累积位移由可恢复的弹性变形和不可恢复的塑性变形组成，塑性变形与循环次数和加载应力水平有关；双向循环荷载造成桩顶刚度弱化明显，引起桩身产生更大的弯曲效应；桩周孔压累积与循环次数和加载幅值有关，双向循环下桩周孔压累积更为显著。

Abstract

To study the lateral cyclic loading response of large-diameter monopiles in soft clay

the centrifugal model tests of large-diameter monopiles in soft clay under different cyclic loading forms (one-way and two-way) were carried out. The deformation characteristics of large-diameter monopiles

stiffness weakening

bending moment

cyclic p-y curves and excess pore-water pressure were relatively analyzed. The test results show that the load-displacement curves show obvious nonlinear retardation energy consumption and displacement accumulation properties. Compared with the one-way cycle loading

the two-way cycle loading causes a significant cumulative displacement

which is influenced by both the number of cycles and the loading amplitude. The cumulative displacement consists of recoverable elastic deformation and unrecoverable plastic deformation

which is related to the number of cycles and loading stress level. The two-way cycle loading causes the weakening of pile-top stiffness

thereby enhancing the bending effect of the pile. The accumulation of excess pore-water pressure is related to the cycle number and loading amplitude

with a more pronounced effect observed under two-way loading conditions.

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