Incorporating the AUS criterion into the limit equilibrium method to study the undrained seismic bearing capacity of strip footings on anisotropic slopes

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

Computers and Geotechnics Pub Date : 2025-08-23 DOI:10.1016/j.compgeo.2025.107577

Amin Keshavarz , Shabnam Shirazizadeh , Majid Beygi , Jie Li

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Abstract

This study employed the limit equilibrium method (LEM) to assess the undrained seismic bearing capacity of strip footings adjacent to anisotropic slopes. A pseudo-static approach was employed, incorporating horizontal and vertical acceleration coefficients to simulate seismic forces. The anisotropic undrained shear strength (AUS) criterion was adopted for capturing anisotropy in shear strength; however, its application within the LEM introduced some complexity. This complexity arose from the need to solve a system of nonlinear equations. As a result, the Newton method was used to solve the equations efficiently, ensuring accurate results while maintaining computational stability. The results showed a strong correlation between the failure mechanisms predicted by the Finite Element Limit Analysis (FELA) method and the predefined failure mechanisms in the present study. Additionally, the findings emphasise the significant impact of anisotropy ratio on undrained seismic bearing capacity, with reductions of up to 33% observed in some cases.

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将AUS准则引入极限平衡法研究各向异性边坡条形基础不排水抗震承载力

本文采用极限平衡法（LEM）对各向异性边坡相邻条形基础的不排水抗震承载力进行了评价。采用拟静力法，结合水平和垂直加速度系数来模拟地震力。采用各向异性不排水抗剪强度（AUS）准则来捕捉抗剪强度的各向异性；然而，它在登月舱中的应用引入了一些复杂性。这种复杂性来自于需要解决一个非线性方程组。因此，采用牛顿法高效地求解方程，在保证计算结果准确的同时保持了计算的稳定性。结果表明，有限元极限分析（FELA）方法预测的破坏机制与本研究中预先确定的破坏机制具有较强的相关性。此外，研究结果强调了各向异性比对不排水地震承载能力的重大影响，在某些情况下可降低33%。

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.