Failure Mode Filter

The Failure Mode Filter option allows you to filter analysis results (include or exclude) according to various possible wedge failure modes.

To use the Failure Mode Filter:

1. Select the Failure Mode Filter option from the Analysis menu.
2. Select Apply Failure Mode Filter checkbox at the top of the dialog.
3. Use the checkboxes to specify the failure mode(s) you wish to exclude from the analysis, by clearing the desired checkboxes.
4. Select OK.

Notes:

• By default, all possible failure mode outcomes are always considered. Only use the Failure Mode Filter if you wish to focus the analysis results on a particular failure mode (e.g. sliding on one plane, sliding on two planes) or if you wish to exclude analysis outcomes such as stable, sliding upslope or contact loss.
• Failure modes or wedges which you exclude from the analysis results will be considered as "invalid wedges". By applying the failure mode filter, this may affect computed analysis results such as Probability of Failure. For example, this allows you to determine the probability of failure for individual sliding modes (e.g. joint 1, joint 2 or both planes).
• The Failure Mode Filter also affects the output of statistical graphs (e.g. histograms, scatter plots), exported statistical data and other relevant analysis output (e.g., Info Viewer).

Failure Mode Filter Options

The Failure Mode Filter options include:

• Allow Sliding on Both Joint #1 and Joint #2: Accounts for wedges which slide simultaneously on both joint planes (i.e., along the line of intersection of Joint 1 and Joint 2)
• Allow Sliding on Joint #1 Only: Accounts for wedges sliding only on Joint #1
• Allow Sliding on Joint #2 Only: Accounts for wedges sliding only on Joint #2
• Allow Infinitely Stable Wedges: An infinitely stable wedge is defined as a wedge with an infinite Factor of Safety. To exclude such wedges clear this checkbox
• Allow Wedges to Slide Upslope: Allows wedges to slide upward. To exclude these clear this checkbox
• Allow Wedges to Lose Contact with Joint Planes: Allows wedges to lose contact with sliding planes due to upwards forces, without sliding on a certain joint plane. To exclude these clear this checkbox