SLIDING STABILITY FOR CONCRETE STRUCTURES
Design Process
Determining Foundation Strength Parameters
Methods of Analysis
Analytical Techniques for Multi-wedge Systems
Design Considerations - ETL-1110-2-2560007
Figure 1. Sign Convention for Geometry
Figure 2. Geometry of the Typical ith Wedge and Adjacent Wedges
Figure 3. Distribution of Pressures and Resultant Forces Acting on a Typical Wedge
Figure 4. Free Body Diagram of the ith Wedge
Figure 5. Derivation of the General Equation
Figure 6. Derivation of the General Equation
Figure 7. Derivation of the General Equation (cont)
Figure 8. Force Polygon for a Typical Wedge
Figure 9. Force Polygons for Upward and Downward Sliding
Notes for Figure 8 and 9
The effects of seepage froces should be included in the sliding analysis
Seismic Sliding Stability
Figure 10. Uplift Pressures
Required Factors of Safety
Figure 11. Seismically Loaded Gravity Dam
List of Symbols
List of Symbols (cont)
General - ETL-1110-2-2560025
Background - ETL-1110-2-2560026
Problems with Previous Design Criteria
Shear-Friction
List of Symbols for Inclosure 1
Examples
Example 1: Single Wedge
Example 2: Multiple Wedges
Free Body Diagram of Wedges
Sign Convention for General Equation
Example : Five Wedge System
Example : Five Wedge System (cont)
Example : Five Wedge System (cont)
Summary: Wedge Forces for Trial Safety Factors
Graphical Solution for Safety Factor
Alternate Method of Analysis
Case 1: Single-Plane Failure Surface
Use of Equations and Limitations of Analytical Techniques
Case Two: Multiple-Plane Failure Surface
Figure 3-1. Single Plane Failure Mode
Figure 3-2. Multiple Plane Failure Mode in the Simplist Form of Two Planes
Figure 3-3. Plot of nα and α for Values of tanφ/FS
ETL 1110-2-256
Design Process
Determining Foundation Strength Parameters
Methods of Analysis
Analytical Techniques for Multi-wedge Systems
Design Considerations - ETL-1110-2-2560007
Figure 1. Sign Convention for Geometry
Figure 2. Geometry of the Typical ith Wedge and Adjacent Wedges
Figure 3. Distribution of Pressures and Resultant Forces Acting on a Typical Wedge
Figure 4. Free Body Diagram of the ith Wedge
Figure 5. Derivation of the General Equation
Figure 6. Derivation of the General Equation
Figure 7. Derivation of the General Equation (cont)
Figure 8. Force Polygon for a Typical Wedge
Figure 9. Force Polygons for Upward and Downward Sliding
Notes for Figure 8 and 9
The effects of seepage froces should be included in the sliding analysis
Seismic Sliding Stability
Figure 10. Uplift Pressures
Required Factors of Safety
Figure 11. Seismically Loaded Gravity Dam
List of Symbols
List of Symbols (cont)
General - ETL-1110-2-2560025
Background - ETL-1110-2-2560026
Problems with Previous Design Criteria
Shear-Friction
List of Symbols for Inclosure 1
Examples
Example 1: Single Wedge
Example 2: Multiple Wedges
Free Body Diagram of Wedges
Sign Convention for General Equation
Example : Five Wedge System
Example : Five Wedge System (cont)
Example : Five Wedge System (cont)
Summary: Wedge Forces for Trial Safety Factors
Graphical Solution for Safety Factor
Alternate Method of Analysis
Case 1: Single-Plane Failure Surface
Use of Equations and Limitations of Analytical Techniques
Case Two: Multiple-Plane Failure Surface
Figure 3-1. Single Plane Failure Mode
Figure 3-2. Multiple Plane Failure Mode in the Simplist Form of Two Planes
Figure 3-3. Plot of nα and α for Values of tanφ/FS
ETL 1110-2-256
