Arc Failure Surface

 

 

Create Circular Failure Surfaces in Slope Stability Analysis (SAM, LEM).

Applicable Modules:

Ground image233.gif

Slope image68.gif

Soft Ground image237.gif

Foundation image236.gif

Seepage image235.gif

Dynamic image238.gif

 

 

 

From the Main Menu, select Limit Equilibrium Method > Boundaries > Arc Failure Surface image97.jpg

From the Command Line, type 'CircularSurface'

 

 

 

2016-01-12_14-30-20.png     Boundary Set

Select the Boundary Set under which the Circular Failure Surface Boundary has to be assigned . If boundary set which is predefined does not exist, click image78.gif to invoke the Define Boundary Set dialog to generate boundary set.

 

Grid Data

Specify the grid range within which the centers of arcs will be located.

Direct draw method

Grid Spacing

Input spacing of grids.

 

Method of using Table

Specify Grid location coordinates directly. (But, Grid contour will not output. It is possible to define more than or equal to 1.)

 

Radius Data

Specify the range of radius.

Method of using Arc Tangent Lines

Generate reference lines which will become the tangents to arcs.

 

Arc radius increment

Enter the increment for generating arc radius.

 

Number of Arc

Specify the number of incremental tangents. From the grid points, shortest lines to the tangents are generated.  

 

Change Tangent Direction

Rotate the tangent direction by 90 degrees.

 

2016-01-12_14-41-23.png

Method of using Arc Radius and Length

Specify the range of radius and length.

 

Method of searching First Arc Radius

Specify arc radius which is used first.

 

Shortest Radius

Use the shortest arc radius.

 

Passage Point

Define a point through which the arc will pass and use arc radius.

 

Arc radius increment

Specify the increment of arc radius to be increased from the first arc radius.

 

Number of Arc

Specify the number of incremental tangents. From the grid points, shortest lines to the tangents are generated.

 

Layer Set Limiting Passage

Specify a layer set through which no arcs will be generated.

 

 

Method of using Table

Specify one pair  of location coordinates of radius to the left and right side respectively.

                 < Define Arc Failure Surface >

 

Click 2016-01-12_14-01-12.png to reset the dialog box.

Click image73.gif, After creating the boundary conditions, the dialog box will be closed upon clicking.

Click image79.gif or press the ESC key to close the dialog box.

Click apply.gif to generate boundary conditions. After boundary condition is generated, the work process will switch to entering of name.