[1] XU Chengshun, WANG Bo, EL NAGGAR M. Hesham, LI Shuo, et al. Soil-pile interaction and evolution of soil pressure in an inclined liquefiable site-pile group-superstructure system [J]. Journal of Southeast University (English Edition), 2025, 41 (4): 401-411. [doi:10.3969/j.issn.1003-7985.2025.04.001]

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Soil-pile interaction and evolution of soil pressure in an inclined liquefiable site-pile group-superstructure system()

倾斜可液化场地-群桩基础-上部结构体系桩-土相互作用及土压力演化规律分析

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

41

Issue:

2025 4

Page:

401-411

Research Field:

Civil Engineering

Publishing date:

2025-11-30

Info

Title:

Soil-pile interaction and evolution of soil pressure in an inclined liquefiable site-pile group-superstructure system

倾斜可液化场地-群桩基础-上部结构体系桩-土相互作用及土压力演化规律分析

Author(s):

XU Chengshun¹, WANG Bo¹, EL NAGGAR M. Hesham², LI Shuo¹, JIA Xiaofang¹, ZHANG Zhengzhe¹

1.State Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, China
2.Department of Civil and Environmental Engineering, Western University, London N6A3K7, Canada

许成顺¹, 王博¹, EL NAGGAR M. Hesham², 李硕¹, 贾肖芳¹, 张正哲¹

1.北京工业大学桥梁工程安全与韧性全国重点实验室, 北京 100124
2.Department of Civil and Environmental Engineering, Western University, London N6A3K7, Canada

Keywords:

pile-soil interaction;  liquefaction;  circumferential soil pressure;  group pile effect;  shaking table tests;  OpenSees numerical simulation

桩–土相互作用; 液化; 径向土压力; 群桩效应; 振动台试验; OpenSees数值模拟

PACS:

TU435

DOI:

10.3969/j.issn.1003-7985.2025.04.001

Abstract:

This study presents a numerical simulation of large-scale shaking table tests on a superstructure supported by a pile group installed in an inclined liquefiable site, focusing on nonlinear interactions between piles and the soil. A three-dimensional finite element model of a soil-pile-superstructure system is developed using OpenSeesMP. The temporal and spatial evolution of the radial soil pressure around the pile is evaluated in both liquefied and nonliquefied sites. Results show that the soil pressure around the pile is significantly influenced by site inclination and soil lateral spreading. In liquefied sites, the soil pressure in the extruded zone of the upstream pile is significantly higher than that in the diffused zone. However, higher pressure occurs in the diffused zone for nonliquefied sites. Correspondingly, the liquefaction state significantly influences the force characteristics of the pile group system. Additionally, the group effect is more pronounced in liquefied sites. The results also indicate that the soil pressure distribution around the piles is closely related to the relative pile-soil displacement and reveals different on-pile force mechanisms under varying site conditions. These findings offer valuable insights into the seismic design of pile foundations in inclined liquefied sites.

基于数值模拟复现的倾斜可液化场地-群桩基础-上部结构大型振动台试验，重点研究了桩与土体之间的非线性相互作用。采用OpenSeesMP平台建立了场地-群桩-上部结构的三维有限元模型，分析了液化和非液化场地中桩周径向土压力随时间与深度的演化规律。结果表明：桩周土压力显著受场地倾斜和土体侧向扩展的影响；液化场地中，上游桩挤压区土压力显著高于扩散区，而非液化场地则表现为扩散区压力相对更高。这表明液化状态显著影响群桩体系的受力特征，液化场地中的群桩效应更加明显。此外，研究还表明，桩周土压力的分布与桩土间相对位移密切相关，揭示了不同场地条件下桩基础的受力机制。本研究可为倾斜液化场地的桩基础抗震设计提供科学依据。

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Memo

Memo:

Received 2025-04-23,Revised 2025-06-30.
Biography:?XU Chengshun (1977─), female, doctor, professor, xuchengshun@bjut.edu.cn.
Foundation item: The National Science Fund for Distinguished Young Scholars (No. 52225807).
Citation:XU Chengshun,WANG Bo,EL NAGGAR M. Hesham,et al.Soil-pile interaction and evolution of soil pressure in an inclined liquefiable site-pile group-superstructure system[J].Journal of Southeast University (English Edition),2025,41(4):401-411.DOI:10.3969/j.issn.1003-7985.2025.04.001.DOI:10.3969/j.issn.1003-7985.2025.04.001

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