A two-step dynamic FEM-FELA approach for seismic slope stability assessment

IF 5.6 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2024-11-18 DOI:10.1007/s11440-024-02443-4

Christoph Schmüdderich, Charlotte Herz, Alischa Albared, Jan Machaček, Luis Felipe Prada-Sarmiento, Patrick Staubach, Torsten Wichtmann

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引用次数: 0

Abstract

The determination of the factor of safety (FoS) of slopes during seismic excitation can be complex if the relevant effects of pore water pressure accumulation, nonlinear material response and variable shear strength are duly accounted for. A rational two-step approach to tackle this task based on a hydro-mechanically coupled dynamic simulation and finite element limit analyses is henceforth introduced. To ensure accurate transfer of the hydro-mechanical soil state, a mapping concept is presented, accounting for spatial distributions of stresses, excess pore water pressures, inertial forces and shear strength. The proposed approach is compared to limit equilibrium method (LEM) for the case of a large-scale water-saturated open cast mine slope subjected to seismic loading. In comparison with LEM, the new approach to assess seismic slope stability proves to be simpler in its implementation and straightforward, which could be an important asset for practitioners.

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地震边坡稳定性评价的两步动态FEM-FELA方法

如果充分考虑孔隙水压力累积、非线性材料响应和变抗剪强度的相关影响，则边坡在地震作用下的安全系数的确定可能是复杂的。因此，本文介绍了一种基于水-机械耦合动态仿真和有限元极限分析的合理的两步方法来解决这一问题。为了保证土的水力学状态的准确传递，提出了一种映射概念，考虑了应力、超孔隙水压力、惯性力和抗剪强度的空间分布。将该方法与极限平衡法（LEM）进行了比较，并对地震荷载作用下大型饱和水露天矿边坡进行了分析。与LEM相比，评估地震边坡稳定性的新方法在实施上更简单，更直接，这对从业者来说是一项重要的资产。

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

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.