Mesoscopic mechanism for enhancing the liquefaction resistance of fiber-reinforced sand

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

Computers and Geotechnics Pub Date : 2025-09-13 DOI:10.1016/j.compgeo.2025.107634

Yuan Ding, Bin Ye, Jiazhi Zhu, Chuangji Lin

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引用次数: 0

Abstract

The addition of fibers to sand has been demonstrated to effectively increase soil liquefaction resistance. In this study, discrete element method (DEM) simulations of undrained cyclic triaxial tests on clean sand and fiber-reinforced sands were conducted to investigate the mechanism by which the liquefaction resistance of fiber-reinforced sand is increased. First, the different mechanical behaviors of clean sand and fiber-reinforced sands with different fiber contents were compared at the macroscopic level. The evolution of the mechanical coordination number, internal tension of the fibers, contact force of between the soil and fibers, and fabric of the fiber-reinforced sand were subsequently studied to clarify the mesomechanical mechanisms involved in enhancing the liquefaction resistance of the fiber-reinforced sand. Finally, a quantitative evaluation of the network constructed by strong soil-fiber contact was conducted. The simulation results demonstrate that fiber inclusion can substantially augment the liquefaction resistance of sand, with the effect being more pronounced at higher fiber contents within a specific range.

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增强纤维增强砂抗液化能力的细观机理

在砂土中加入纤维可以有效地提高土壤的抗液化能力。采用离散元法（DEM）对洁净砂和纤维加筋砂不排水循环三轴试验进行模拟，探讨纤维加筋砂抗液化能力提高的机理。首先，从宏观层面比较了不同纤维含量的洁净砂和纤维增强砂的力学行为差异；研究了纤维增强砂的力学配位数、纤维内部张力、土与纤维之间的接触力以及纤维增强砂结构的演化，阐明了增强纤维增强砂抗液化能力的细观力学机制。最后，对土-纤维强接触所形成的网络进行了定量评价。模拟结果表明，纤维包裹体可以显著增强砂土的抗液化能力，在一定范围内纤维含量越高，其作用越明显。

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.