4.5   Point Loads

  • MacSlope allows an unlimited number of point loads to be applied to the ground surface of the slope geometry.
  • To create a point load, select Define Point Load from the Materials / Loads tab of the tool palette, select a line on the ground surface and click at the desired location.
  • You will be presented with a blue point marker representing the point load.
  • Click the marker for manual input of the location, or drag markers to move location above the selected line. Note that point loads do not snap.
  • Use the Select/Pan tool to edit the point load magnitude and inclination angle by selecting the point load and right clicking.
  • By default point loads are created normal to the selected ground surface line. Point loads can not be specified parallel to the ground surface line.
  • The units to define point loads are kN in Metric and lbf in Imperial.
  • MacSlope creates an external force acting at the top of the slice where the point load is acting, and at the specified inclination angle.
  • Once an analysis is complete, use the Inspector Tool and tap over a slice to view the slice forces and verify the point load has been modeled as expected.
  • Take care specifying point loads on a submerged ground surface. If the option "Include No Strength Regions in Slice" is enabled for submerged slopes, the point load will be applied to the top of a no strength region, which is not physically possible. In this case it is recommended to use the "Apply Hydrostatic Force to Top of Slice" option for submerged slopes.

Using the Select/Pan Tool to edit / delete a point load

  • Select the Select/Pan Tool in the Drawing tab of the tool palette, and click once on a point load in the drawing to select it. The point load will be highlighted to indicate it is selected. Now right click and a menu will be presented with the option to edit the point load magnitude/angle, or delete the point load.