海上风力机单桩基础水平受力简化分析方法

doi:doi:10.19912/j.0254-0096.tynxb.2024-0739

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海上风力机单桩基础水平受力简化分析方法

更新时间：2025-10-22

- 海上风力机单桩基础水平受力简化分析方法
- Vol. 46, Issue 9, Pages: 42-50(2025)
- 作者机构：
- 作者简介：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0739
  CLC： TU473
- Published Online：14 October 2025，
  
  Published：2025
- 稿件说明：
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[J]. 2025, 46(9): 42-50.
DOI：

[J]. 2025, 46(9): 42-50. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0739.

摘要

水平荷载作用下海上风力机单桩发生刚性转动变形模式

桩周竖向摩阻力形成桩身抗力矩

同时桩端土土体对桩端截面形成抗力作用。该文首先基于径向土压力分布函数得出桩身抗力矩的计算公式

建立桩端截面转动过程中竖向应力变化模型

推导桩端抗力矩的离散数值解和简化公式解。其次

基于线弹性-塑性摩阻力-位移模型

建立桩端水平剪力的计算公式。然后

根据刚性桩在水平荷载作用下的变形模式建立简化分析模型

通过与试验结果开展对比研究

验证了该文方法的合理性。最后

分析3种附加抗力在水平承载力的比例随桩直径、长径比、土内摩擦角的变化规律

结果表明：随着长径比增加

附加抗力在水平承载力的比例逐渐减小;随着直径增加

附加抗力在水平承载力的比例未显著变化;随着内摩擦角增加

桩身抗力矩在水平承载力的比例逐渐增加。

Abstract

Under the action of horizontal loads

a rigid rotational deformation mode occurs in the monopile foundation of offshore wind turbines. The vertical frictional resistance around the pile forms a resisting moment on the pile body

while the soil at the pile tip exerts a resisting force on the pile tip section. This paper first derives the formula for calculating the resisting moment on the pile body based on the radial distribution function of soil pressure

establishes a model of vertical stress variation during the rotation process of the pile tip section

and deduces the discrete numerical solution and simplified formula solution of the resisting moment at the pile tip. Secondly

based on the linear elastic-plastic frictional resistance-displacement model

a formula for calculating the horizontal shear force at the pile tip is established. Then

a simplified analysis model is established according to the deformation mode of rigid piles under horizontal loads. The reliability of the proposed analysis model is verified through comparative studies with experimental results. Finally

the variation pattern of the proportion of three additional resistances in horizontal bearing capacity with pile diameter

aspect ratio

and soil friction angle is analyzed. The results reveal that the proportion of additional resistance to horizontal bearing capacity decreases gradually with the increase of slenderness ratio

but shows no significant changes with the increase of diameter. As the internal friction angle increases

the proportion of pile shaft resisting moment in horizontal bearing capacity gradually increases.

关键词

Keywords

references

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