3D failure envelope of rigid inclusion reinforced foundations

IF 5.6 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Acta Geotechnica Pub Date : 2024-04-16 DOI:10.1007/s11440-024-02309-9
Ramon Alcala-Ochoa, Zheng Li, Panagiotis Kotronis, Giulio Sciarra
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Abstract

The paper focuses on the identification of the 3D failure envelope of a shallow foundation on soft soil reinforced by rigid inclusions. A nonlinear 3D finite element model is first validated against literature results and novel centrifuge experimental data. The failure envelope, defined in the vertical force (V), bending moment (M) and horizontal force (H) space, is then constructed using numerical swipe tests. Analytical formulas are introduced to describe the 3D failure envelope shape and inclination, considering the influence of the coverage area, the thickness, and the friction angle of the load transfer platform. Finally, the efficiency of a rigid inclusion foundation is highlighted by comparing its failure envelope to that of the same foundation without rigid inclusions. The proposed analytical failure envelope can be used by engineers to quantify the bearing capacity of rigid inclusion foundations and by researchers to develop novel macroelements submitted to complex coupled loads.

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刚性包络加固地基的三维破坏包络
本文的重点是识别由刚性夹杂物加固的软土上浅层地基的三维破坏包络。首先根据文献结果和新型离心机实验数据验证了非线性三维有限元模型。然后利用数值刷卡试验构建了在垂直力(V)、弯矩(M)和水平力(H)空间定义的破坏包络。考虑到载荷传递平台的覆盖面积、厚度和摩擦角的影响,引入分析公式来描述三维破坏包络的形状和倾斜度。最后,通过比较刚性内含物地基与无刚性内含物地基的破坏包络,突出了刚性内含物地基的效率。所提出的分析破坏包络可供工程师用于量化刚性内含物地基的承载能力,也可供研究人员用于开发可承受复杂耦合荷载的新型宏观构件。
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来源期刊
Acta Geotechnica
Acta Geotechnica ENGINEERING, GEOLOGICAL-
CiteScore
9.90
自引率
17.50%
发文量
297
审稿时长
4 months
期刊介绍: Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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