A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory

LU Feng; QIU Wen-ge

doi:10.16285/j.rsm.2020.0435

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A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory

更新时间：2026-06-25

- A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory
- Vol. 42, Issue 2, Pages: 547-557(2021)
- 作者机构：
  
  1. 西南交通大学交通隧道工程教育部重点实验室,四川,成都,610031
  2. 西南交通大学土木工程学院,四川,成都,610031
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.0435
  CLC： TU457
- Online First：09 February 2021，
  
  Published：2021
- 稿件说明：
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LU Feng, QIU Wen-ge. A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory[J]. 2021, 42(2): 547-557.
DOI：

LU Feng, QIU Wen-ge. A multiparameter non-proportional shear strength reduction method for slope stability analysis based on energy evolution theory[J]. 2021, 42(2): 547-557. DOI： 10.16285/j.rsm.2020.0435.

摘要

边坡的破坏是一个渐进的过程，在失稳过程中，不同力学参数或不同材料对维持边坡稳定性发挥的贡献是不同且动态变化的，对综合安全系数的贡献也不同。因此，研究不同力学参数间或不同材料间非等比例折减的安全系数求解方法具有重要意义。首先基于能量演化理论，分析了边坡破坏过程中的能量演化机制。然后在参照边坡的安全系数定义框架下，以力学参数在折减过程中对耗散能演化的贡献为权重，提出了一种考虑参数折减过程相关性的多参数非等比例折减的安全系数求解方法。此方法可以求解安全系数随折减路径的全过程演化规律，并具有明确的物理意义。随后通过算例分析了求解方法的合理性。最后讨论了采用该方法进行安全系数计算时，折减步长和折减路径对计算结果的影响。

Abstract

In the failure process of slopes

the contribution of different mechanical or material parameters to the stability is different and dynamic. In the context of shear strength reduction method (SRM) for stability analysis

it is of great significance to determine the factor of safety (FOS) by considering non-proportional reduction for these different mechanical or material parameters. This study firstly examines the mechanism of energy evolution in the process of slope failure. Then

the contribution of different mechanical parameters to dissipated energy evolution is weighted in conducting SRM

based on which we proposed a new method to calculate the FOS with multiparameter non-proportional reduction of shear strength parameters. This method can reflect the characteristic of FOS following the whole reduction path of different shear strength parameters. Subsequently

the proposed method is verified by examples. Finally

the influence of the reduction step and reduction path of the non-proportional reduction factors on the calculated FOS results is discussed.

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