Stability Analysis and Design of Cantilever Retaining Walls with Regard to Possible Failure Mechanisms: An Upper Bound Limit Analysis Approach

2017 ◽  
Vol 35 (3) ◽  
pp. 1079-1092 ◽  
Author(s):  
Asadollah Ranjbar Karkanaki ◽  
Navid Ganjian ◽  
Faradjollah Askari
Keyword(s):  
Stability Analysis ◽  
Upper Bound ◽  
Limit Analysis ◽  
Failure Mechanisms ◽  
Retaining Walls ◽  
Analysis Approach ◽  
Analysis And Design ◽  
Cantilever Retaining Walls ◽  
Upper Bound Limit Analysis

scholarly journals Comparative study of material point method and upper bound limit analysis in slope stability analysis

2020 ◽  
Vol 2 (1) ◽  
pp. 44-57
Author(s):  
Lianheng Zhao ◽  
Nan Qiao ◽  
Zhigang Zhao ◽  
Shi Zuo ◽  
Xiang Wang
Keyword(s):  
Stability Analysis ◽  
Upper Bound ◽  
Limit Analysis ◽  
Slope Failure ◽  
Slip Surface ◽  
Material Point Method ◽  
Material Point ◽  
Critical Slip Surface ◽  
The Stability ◽  
Upper Bound Limit Analysis

Abstract The upper bound limit analysis (UBLA) is one of the key research directions in geotechnical engineering and is widely used in engineering practice. UBLA assumes that the slip surface with the minimum factor of safety (FSmin) is the critical slip surface, and then applies it to slope stability analysis. However, the hypothesis of UBLA has not been systematically verified, which may be due to the fact that the traditional numerical method is difficult to simulate the large deformation. In this study, in order to systematically verify the assumption of UBLA, material point method (MPM), which is suitable to simulate the large deformation of continuous media, is used to simulate the whole process of the slope failure, including the large-scale transportation and deposition of soil mass after slope failure. And a series of comparative studies are conducted on the stability of cohesive slopes using UBLA and MPM. The proposed study indicated that the slope angle, internal friction angle and cohesion have a remarkable effect on the slip surface of the cohesive slope. Also, for stable slopes, the calculation results of the two are relatively close. However, for unstable slopes, the slider volume determined by the UBLA is much smaller than the slider volume determined by the MPM. In other words, for unstable slopes, the critical slip surface of UBLA is very different from the slip surface when the slope failure occurs, and when the UBLA is applied to the stability analysis of unstable slope, it will lead to extremely unfavorable results.

Upper bound limit analysis of masonry retaining walls using PIV velocity fields

Meccanica ◽  
2017 ◽  
Vol 53 (7) ◽  
pp. 1661-1672 ◽  
Author(s):  
Benjamin Terrade ◽  
Anne-Sophie Colas ◽  
Denis Garnier
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Retaining Walls ◽  
Velocity Fields ◽  
Upper Bound Limit Analysis

scholarly journals A fast and general upper-bound limit analysis approach for out-of-plane loaded masonry walls

Meccanica ◽  
2017 ◽  
Vol 53 (7) ◽  
pp. 1875-1898 ◽  
Author(s):  
Andrea Chiozzi ◽  
Gabriele Milani ◽  
Nicola Grillanda ◽  
Antonio Tralli
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Analysis Approach ◽  
Masonry Walls ◽  
Out Of Plane ◽  
Upper Bound Limit Analysis

scholarly journals Upper Bound Limit Stability Analysis for Soil Slope with Nonuniform Multiparameter Distribution Based on Discrete Algorithm

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Zhen Wang ◽  
Xumeng Yang ◽  
Ang Li
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Upper Bound ◽  
Limit Analysis ◽  
Slip Surface ◽  
Open Pit ◽  
Calculation Error ◽  
Soil Slope ◽  
Stability Coefficient ◽  
Upper Bound Limit Analysis

Slope stability analysis is a core issue in geotechnical engineering. This paper proposes a method of upper bound limit stability analysis for a slope with multiparameter coordinated variation based on the comprehensive consideration of the nonuniform distribution of slope soil parameters. This method starts from the perspective of energy balance, establishes a slope failure mechanism which meets velocity separation requirements, deduces its calculation formula for external force power and internal energy dissipation power, develops a cycle program for the most dangerous slip surface searching and stability coefficient calculation through computer programming technology, and finally forms a calculation method of upper bound limit stability analysis for the soil slope with nonuniform multiparameter distribution. At the same time, this method takes a dump slope in an open-pit mine as the engineering background, considers the nonuniformity of density, cohesion, and internal friction angle of the slope soil under subsidence, applies upper bound limit analysis to analyze the slope stability, and evaluates the accuracy of analysis results by using the residual thrust method. The results show that upper bound limit analysis has highly accuracy in stability coefficient calculation; compared with the residual thrust method, the stability coefficient calculation result by upper bound limit analysis is a strict upper bound solution, and the calculation error is easy to be estimated and eliminated. Simultaneously, the most dangerous slip surface obtained by upper bound limit analysis can fully satisfy the velocity separation requirement and has a greater engineering reference value.

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