Probabilistic analysis of top deflection of laterally loaded piles considering spatially variable soil stiffness

IF 6.2 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2025-09-08 DOI:10.1016/j.compgeo.2025.107592

Yongbo Gan , Yajun Li , Honghu Zhu , Bin Zhang

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引用次数: 0

Abstract

Pile foundations represent one of the most prevalent foundation types utilized in offshore geotechnical engineering for deep foundations. For the laterally loaded piles which primarily experience bending deformation, engineers are mainly concerned about the characteristics of the pile top deflection under the action of lateral load during the service period. Due to the spatial variability of soil properties, the pile top deflection may still exceed the design maximum allowable deflection under the requirements of Serviceability Limit State (SLS), and the probabilistic approach can address this issue. This paper investigates the failure probability of a single pile’s top deflection in consideration of the spatial variability of soil lateral stiffness. Using the random finite element method (RFEM), the statistical characteristics of the pile top deflection under different degrees of soil stiffness variability are analyzed. Based on the local average theory, an approximate analytical method is proposed. This method is verified by the Monte Carlo simulation (MCS) results of random finite element analysis. The results demonstrate that the analytical method can accurately predict the statistical characteristics and failure probability of the pile top deflection. It offers an alternative to the complicated Monte Carlo simulations, and provides a convenient tool for estimating the failure probability of pile top deflection for laterally loaded piles.

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考虑空间变土刚度的横向荷载桩顶挠度概率分析

桩基础是海洋岩土工程中最常用的深层基础形式之一。对于以弯曲变形为主的水平荷载桩，工程师主要关注的是在水平荷载作用下的桩顶挠度特征。由于土性的空间变异性，在可使用极限状态（SLS）要求下，桩顶挠度仍有可能超过设计最大允许挠度，概率方法可以解决这一问题。本文研究了考虑土体侧移刚度空间变异性的单桩顶挠度破坏概率。采用随机有限元法，分析了不同土体刚度变化程度下桩顶挠度的统计特征。基于局部平均理论，提出了一种近似解析方法。随机有限元蒙特卡罗模拟（MCS）结果验证了该方法的有效性。结果表明，该分析方法能较准确地预测桩顶挠度的统计特征和破坏概率。它为复杂的蒙特卡罗模拟提供了一种替代方法，为估算侧向荷载桩顶挠度破坏概率提供了一种方便的工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.