埋在天然粘土中的地埋桩基础的VHM失效包络：FELA和FPA-CatBoost优化算法

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2025-03-01 DOI:10.1016/j.oceaneng.2025.120779

Duy Tan Tran , Jim Shiau , Suraparb Keawsawasvong , Pitthaya Jamsawang

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引用次数: 0

摘要

本研究采用AUS破坏准则作为土体强度模型，对各向异性粘土中柱状地基的不排水破坏包络线进行了综合分析。研究了埋置深度（L/D）和各向异性强度（re）对复合加载条件下铲球性能的影响。通过（H/suTCA, M/suTCAD）和（V/ vault, H/suTCA, M/suTCAD）空间的三维有限元极限分析（3D FELA）推导出失效包络。该研究还阐明了spudcan地基的破坏机制，为在组合荷载（V， H， M）下设计各向异性粘土地基提供了有价值的见解。此外，还介绍了一种创新的软计算方法：一种集成了分类提升（CatBoost）和授粉算法（FPA）的机器学习模型，用于优化spudcan破坏包膜的预测。提出的FPA-CatBoost模型与数值FELA结果进行了验证，证明了强相关性，并为工程师提供了确定不同载荷条件下spudcan基础破坏包络的可靠工具。

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VHM failure envelopes of spudcan foundations buried in natural clay: FELA and FPA-CatBoost optimization algorithms

This study provides a comprehensive analysis of the undrained failure envelope for spudcan foundations in anisotropic clays using the AUS failure criterion as the soil strength model. The influence of embedment depth (L/D) and anisotropic strength (r_e) on spudcan behaviour under combined loading conditions is investigated. Failure envelopes are derived through three-dimensional finite element limit analysis (3D FELA) in both (H/s_uTCA, M/s_uTCAD) and (V/V_ult, H/s_uTCA, M/s_uTCAD) spaces. The study also illustrates spudcan foundation failure mechanisms, providing valuable insights for designing footings in anisotropic clays under combined loads (V, H, M). Additionally, an innovative soft-computing approach is introduced: a machine learning model that integrates categorical boosting (CatBoost) with the flower pollination algorithm (FPA) for optimized predictions of the spudcan failure envelope. The proposed FPA-CatBoost model is validated against numerical FELA results, demonstrating a strong correlation and offering engineers a reliable tool for determining spudcan foundation failure envelopes under varied loading conditions.

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来源期刊

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.