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Add Load

1. Introduction

This tutorial will demonstrate how a distributed load can be added to a specific surface area of the model. In Slide3 2017, users were required to imprint geometry to add a load to a specific area; Slide3 2019 no longer requires that loads be imprinted on geometry using a polyline. Loads are now defined using two different menu options: 1) Add Loads, and 2) Add Loads to Selected (first select face, edge, vertices, or entity). This tutorial will provide step-by-step instructions for adding a load using the new and improved Add Loads option.

2. Add Load

Loading and Support Tab

Select File > Recent > Tutorials and read in the file Add Loads – starting file from the installation folder.

Add Load Icon Select: Loading > Add Loads

Begin by defining the load Shape and Properties under the Shape/Property tab:

Enter the following parameters:

  • Shape = Rectangle
  • Width (m) = 10
  • Height (m) = 20
  • Load Type = Uniform Load
  • Magnitude = 200
  • Leave the Basepoint as the default

Add Load Dialog

Select the Surface tab Before selecting OK. .

(In case if you accidently pressed OK, before moving to next tab, you can always return to load settings by clicking edit beside Applied Property in Properties pane.Properties Dialog)

Select Projected on Terrain as the surface that the load will be applied to.

Add Load Dialog - Surface Tab

Finally, select the Location tab.

Notice that the load can be placed on the model using either freehand manipulation or by entering X, Y coordinates.

Enter (75, 50) for the (X, Y) coordinates. This will place the load on the model, with the basepoint (defined in the Shape/Property tab) at the coordinates entered. The load will now appear on the model. Select OK to finalize the placement of the load.

Add Load Dialog - Location Tab

The final model with the load added should now appear.

Final Model with Load Added View

3. Results

Calculator IconSave the file and Compute.

Select Interpret>Show Contours or select Show Contours Contoured Model Icon from the toolbar. You should see the following results (Grid Search, spherical surfaces). The Bishop safety factor is about 1.1. You can clearly see the effect of the load on the normal stress contours for the global minimum slip surface.

Results Model View of Effect of Load

4. Search Options

In the Slip Surface Options dialog turn on the Surface Altering Optimization search method.

Slip Surface Options Dialog

Select Compute to re-run the analysis.

5. Results

With Surface Altering Optimization you obtain a much lower safety factor. Compared to the spherical surface search, the Bishop safety factor is now 0.701.

Results Model View

This concludes the Add Loads tutorial.

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