Investigations of Silty Soil Slopes under Unsaturated Conditions Based on Strength Reduction Finite Element and Limit Analysis

2021 ◽  
Author(s):  
An-Jui Li ◽  
Joram Wachira Mburu ◽  
Chao Wei Chen ◽  
Kuo-Hsin Yang
Keyword(s):  
Finite Element ◽  
Limit Analysis ◽  
Strength Reduction ◽  
Silty Soil ◽  
Soil Slopes

scholarly journals Stability Charts for Pseudostatic Stability Analysis of 3D Homogeneous Soil Slopes Using Strength Reduction Finite Element Method

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Chaowei Sun ◽  
Junrui Chai ◽  
Bin Ma ◽  
Tao Luo ◽  
Ying Gao ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Slope Failure ◽  
Strength Reduction ◽  
Seismic Load ◽  
Wide Range ◽  
Soil Slopes ◽  
Homogeneous Soil ◽  
Element Method

This paper uses the modified strength reduction finite element method to propose stability charts for pseudostatic stability analysis of three-dimensional (3D) homogeneous soil slopes subjected to seismic excitation. These charts are developed in a wide range of input parameters for purely cohesive slopes and cohesive-frictional slopes, respectively. Effect of the horizontal seismic load is approximately considered using the quasistatic approach. The stability charts allow to determine the factor of safety without any iterative procedure and identify the corresponding critical slope failure mechanism. A slope example is employed to illustrate the application and reliability of these stability charts.

Strength reduction finite-element limit analysis

2015 ◽  
Vol 5 (4) ◽  
pp. 250-253 ◽  
Author(s):  
K. Krabbenhoft ◽  
A. V. Lyamin
Keyword(s):  
Finite Element ◽  
Limit Analysis ◽  
Strength Reduction

scholarly journals Seismic Bearing Capacity of Strip Footings on Cohesive Soil Slopes by Using Adaptive Finite Element Limit Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Weihua Luo ◽  
Minghua Zhao ◽  
Yao Xiao ◽  
Rui Zhang ◽  
Wenzhe Peng
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Limit Analysis ◽  
Slope Failure ◽  
Slope Angle ◽  
Cohesive Soil ◽  
Upper And Lower Bounds ◽  
Adaptive Finite Element ◽  
Soil Slopes ◽  
Seismic Bearing Capacity

By employing adaptive finite element limit analysis (AFELA), the seismic bearing capacity of strip footing on cohesive soil slopes are investigated. To consider the earthquake effects, the pseudostatic method is used. The upper and lower bounds for the seismic bearing capacity factor (Nce) are calculated, and the relative errors between them are found within 3% or better by adopting the adaptive mesh strategy. Based on the obtained results, design tables and charts are provided to facilitate engineers use, and the effects of footing position, undrained shear strength, slope angle, slope height, and pseudostatic acceleration coefficient are studied in detail. The collapse mechanisms are also discussed, including overall slope failure and foundation failure.

Comparison of finite-element limit analysis and strength reduction techniques

Géotechnique ◽  
2015 ◽  
Vol 65 (4) ◽  
pp. 249-257 ◽  
Author(s):  
F. Tschuchnigg ◽  
H.F. Schweiger ◽  
S.W. Sloan ◽  
A.V. Lyamin ◽  
I. Raissakis
Keyword(s):  
Finite Element ◽  
Limit Analysis ◽  
Strength Reduction ◽  
Reduction Techniques

Calculating Stability Factor Using Linear Sliding Method is Not Suitable for all Sandy Soil Slopes

2014 ◽  
Vol 716-717 ◽  
pp. 252-255
Author(s):  
Wei Wei Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sandy Soil ◽  
Strength Reduction ◽  
Engineering Practice ◽  
Stability Factor ◽  
Sliding Method ◽  
Soil Slopes ◽  
Calculation Results ◽  
Element Method

To analyze the reasonable cohesion range of slope stability factor calculated using linear sliding method, different internal friction angles (20°,30°,40°) and cohesion (≤10kPa) of 36 slopes were calculated using linear sliding method, simplified Bishop method and strength reduction finite element method. The results show that, simplified Bishop method and the strength reduction finite element method are close to the stability factors; linear sliding method when cohesion is not considered is conservative, linear sliding method when cohesion is considered is partial to risk; calculating stability factor using linear sliding method is not suitable for all sandy soil slopes, only when the cohesion values not more than 1.5 kPa, the calculation results of linear sliding method are in accordance with engineering practice.

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