A New Approach for Dynamic Stability Analysis of the Slope

2011 ◽  
Vol 243-249 ◽  
pp. 2304-2309
Author(s):  
Run Lin Yang ◽  
Zhe Feng
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Potential Energy ◽  
Numerical Method ◽  
Iterative Process ◽  
Seismic Excitation ◽  
New Approach ◽  
Calculation Process ◽  
Practical Engineering ◽  
Slip Displacement

The slope stability analysis is of importance for the practical engineering, and has received widely attention. Generally, the calculation process of the traditional methods is complex. In this paper, a new method was presented to analyze stability of the simple homogeneous slope, in which the safety factor and the max slip displacement of the slope under seismic excitation can be derived based on the principle of the minimal potential energy. The proposed method was efficient and did not require any iterative process for calculation. In order to evaluate its performance, a numerical example was studied to analyze the slope stability. The numerical results show the proposed method is valid and feasible by comparing with the numerical method.

A new approach for the slope stability analysis

2001 ◽  
Vol 28 (6) ◽  
pp. 653-669 ◽  
Author(s):  
Hongjie Yang ◽  
Jianhua Wang ◽  
Yanqing Liu
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slope Stability Analysis ◽  
New Approach

Stability Analysis of Slope with Arbitrary Sliding Surface on Multi Strata Using Minimum Potential Energy Principle

2011 ◽  
Vol 250-253 ◽  
pp. 2588-2591 ◽  
Author(s):  
Shu Jie Wen ◽  
You Li ◽  
Xin Chen
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Potential Energy ◽  
Safety Factor ◽  
Sliding Surface ◽  
Minimum Potential Energy ◽  
Energy Principle ◽  
Potential Energy Principle ◽  
Minimum Potential ◽  
Minimum Potential Energy Principle

As a rule,the natural slope is not homogeneous,and its sliding surface is arbitrary. However,the common slope stability analysis methods used to assume shape of sliding surface and slope homogeneity,and the calculation process is so complex that accuracy of results is decreasing.In this study,the potential energy function of sliding body is established for slope with arbitrary sliding surface on multi strata.Using minimum potential energy principle, the displacement of sliding body can be got. Then based on Moore - Coulomb criterion and condition of force equilibrium in the sliding direction, the safety factor can be got directly. Case studies show: ①This slope stability analysis methods is valid.② Different definition of safety factor leads to different analysis result.

scholarly journals Three-Dimensional Analysis of Complex Rock Slope Stability Affected by Fault and Weak Layer Based on FESRM

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Yang Li ◽  
Ling Yu ◽  
Weidong Song ◽  
Tianhong Yang
Keyword(s):  
Stability Analysis ◽  
Stress Concentration ◽  
Slope Stability ◽  
Damage Zone ◽  
Three Dimensional ◽  
Rock Slope Stability ◽  
Open Pit ◽  
Structural Plane ◽  
Weak Layer ◽  
Practical Engineering

Slope stability analysis is the most important problem in slope engineering design and construction. Open-pit slope often spans several strata, many of which are relatively weak. There may be faults and weak layers across the whole rock. It is very necessary to study the instability mechanism and stability analysis of multistratigraphic slopes with faults and weak layers. In this paper, taking a complex three-dimensional slope with fault and weak layer as the research object, the evolution laws of the stress field and damage zone of the slope are analyzed by using the finite element strength reduction method. The results show that the fault and weak layer have different degrees of effect on the slope stability. The fault causes stress concentration and damage to nearby rock mass, and the weak layer causes stress concentration on the slope above it and forms a dangerous slip zone. Then the effect of the fault and weak layer on slope stability is discussed. Because the effect of horizontal structural plane on slope stability is greater than that of the vertical structural plane, the effect of weak layer on slope stability is greater than that of the fault in the slope. The research results can provide a theoretical guidance for the study of slope stability in practical engineering.

New Approach to Linear and Nonlinear Stability Analysis of Drill String

2010 ◽  
Author(s):  
Ali Asghar Jafari ◽  
Reza Kazemi ◽  
Mohammad Faraji Mahyari
Keyword(s):  
Stability Analysis ◽  
Potential Energy ◽  
Nonlinear Stability ◽  
Equilibrium Position ◽  
Continuous System ◽  
Drill String ◽  
Order Derivative ◽  
Nonlinear Stability Analysis ◽  
New Approach ◽  
Linear And Nonlinear

In this research, a new approach for stability analysis of drill string is investigated. To this goal, the potential energy of drill string for axial and lateral vibrations is written in an integral equation. In this equation, the effect of geometrical shortening, which causes nonlinear coupling between axial and lateral vibration, is considered. The work done by WOB force and weight of drill string is calculated. The finite element method is employed to convert the integral potential energy of the continuous system to a discrete one. The effects of stabilizers are modeled by dropping the nodes coincided with them. Dropping and considering third and fourth order tensor of potential energy lead to linear and nonlinear stability analysis, respectively. Taking the first order derivative of discrete potential energy, the equilibrium position of drill string can be found. Taking second order derivative, the stability of the equilibrium position can be analyzed. Illustrated results demonstrate that as the length of hole is increased, the differences between linear and nonlinear cases become larger. This analysis shows the working condition of drill string is stable or not. These results can be used to obtain safe working conditions in drilling progress.

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