Progressive Failure Mechanism of Sensitive Clay Slopes: Insights From Stabilized Smoothed Particle Finite Element Analysis of the 2010 Saint‐Jude Landslide

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-07-11 DOI:10.1002/nag.70011

Wei‐Hai Yuan, Ren‐Yuan Xing, Ming Liu, Ding Wang, Bei‐Bing Dai, Wei Zhang

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引用次数: 0

Abstract

Modeling landslides in sensitive clay has long been a challenging issue. In sensitive clays, the shear strength significantly decreases during plastic deformation, leading to the progressive failure of the slopes. Sensitive clays exhibit complex mechanical behavior, and even a small slope failure can often trigger massive landslides. This necessitates a numerical approach capable of handling large deformations, as well as a suitable constitutive model to accurately capture the intricate behavior of these clays. In this study, a novel viscosity‐based hourglass‐control algorithm is proposed to stabilize the node integration in smoothed particle finite element method (SPFEM), and two verification examples are given to demonstrate the efficacy of the proposed method. Then, the proposed stabilized SPFEM is employed to reconstruct the 2010 Saint‐Jude landslide in Quebec, Canada. The method successfully reproduces the progressive failure processes of the Saint‐Jude landslide and quantitatively compares the final run‐out distances and retrogression distances with the field survey data, showing a good agreement.

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敏感黏土边坡的递进破坏机制：来自2010年圣犹达滑坡稳定光滑颗粒有限元分析的启示

长期以来，在敏感粘土中模拟滑坡一直是一个具有挑战性的问题。在敏感粘土中，塑性变形过程中抗剪强度显著降低，导致边坡逐渐破坏。敏感粘土表现出复杂的力学行为，即使是一个小的边坡破坏也常常会引发大规模的滑坡。这就需要一种能够处理大变形的数值方法，以及一个合适的本构模型来准确地捕捉这些粘土的复杂行为。本文提出了一种基于黏度的沙漏控制算法来稳定光滑粒子有限元（SPFEM）中的节点积分，并通过两个算例验证了该算法的有效性。然后，将所提出的稳定SPFEM应用于2010年加拿大魁北克省Saint‐Jude滑坡的重建。该方法成功地再现了圣犹达滑坡的递进破坏过程，并将最终跑出距离和倒退距离与实地调查数据进行了定量比较，结果显示出良好的一致性。

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

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

CiteScore

6.40

自引率

12.50%

发文量

160

审稿时长

9 months

期刊介绍： The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.