Forces

If you are performing a Probabilistic analysis with SWedge, the following forces can be defined as random variables:

• Water Pressure
• Seismic Force

Water Pressure (Probabilistic)

To define Ponded Water Pressure as a random variable in a probabilistic analysis:

1. Select Input Data and select the Ponded Water tab.
2. Select the Ponded Water Pressure check box.
   You can define the Ponded Water Depth as a random variable.
Joint Water Pressure Distribution Model is unavailable when the Pervious option is selected.

To define Joint Water Pressure as a random variable in a probabilistic analysis:

3. Select Input Data and select the Water tab.
4. Select the Joint Water Pressure check box.
5. Joint Water Pressure can be defined as a random variable if you are using the % Filled Fissures option or the Custom Pressure option.
• If the Type = % Filled Fissures slope type or Slope Face Type = Pervious, you can define the Percent Filled as a random variable
• If the Type = Custom Pressure, you can define the Joint1 Pressure and/or the Joint2 Pressure as random variable(s).

For details about the Water Pressure options see the Water Pressure topic.

Seismic Force (Probabilistic)

To define Seismic Force as a random variable in a probabilistic analysis:

1. Select Input Data and select the Seismic tab.
2. Select the Seismic check box.
• You can define the Seismic Coefficient as a random variable
• If the Direction = User Defined, you can define the Plunge and/or Trend as a random variable.

For details about the Seismic Force options see the Seismic Force topic.

External Force (Probabilistic)

At present, it is NOT possible to define an External force (i.e. point load) as a random variable in an SWedge probabilistic analysis. You can include constant External Force(s) in a probabilistic analysis, but you cannot define the force as a random variable.

For details about the External Force option see the External Force topic.