ID_PLOT_EXCESS_SINPLANE   Plot > Strength Factors > Δσip   Excess Stress

ID_PLOT_EXCESS_SINPLANE   Plot > Strength Factors > RCFip   Rock Wall Condition Factor

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Contours the strength for in-plane wall stress.

These components can be accessed via the Strength Factor Components toolbar as follows:

 

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This toolbar can be changed to a vertical orientation by dragging is against either the right or left hand edge of the main window.

It can be changed back to a horizontal orientation by dragging is against either the top or bottom edge of the main window.

 

Selecting the clip0306 button on the Contours toolbar activates the Strength Factor Components toolbar.

 

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To calculate the in-plane wall stress, the stress state at each point on the grid plane is reoriented to determine the maximum and minimum tangential stress parallel to the grid plane.

 

The maximum wall stress for a virtual circular excavation oriented perpendicular to the grid plane can then be determined as [ 3 σ1i - σ3i ].

Note that σip is oriented normal to the grid plane and parallel to the direction of a line grid. Also note that σip, σ1i and σ3i are perpendicular to one another.

 

dip direction is measured positive clockwise from the y-axis.

dip of the plane is measured positive down from the horizontal (i.e. the dip direction).

plunge of the normal is measured positive down (i.e. negative up) from the horizontal.

 

ID_PLOT_EXCESS_SINPLANE dSip Excess   can be determined as Δσip = [ 3 σ1i - σ3i ] - UCS

ID_PLOT_EXCESS_SINPLANE RCFip   can be determined as RCFip = [ 3 σ1i - σ3i ]/UCS

 

Strength parameters are set up using

 

ID_PLOT_MODIFY_IP Plot > Strength Factors > In-plane Parameters

 

Related topics:

 

ID_PLOT_STRESS_INPLANESHEAR Plot > Stress > Tip - In-plane Shear

 

ID_PLOT_STRESS_INPLANENORMAL Plot > Stress > Sip - In-plane Normal

 

ID_PLOT_STRESS_INPLANEMAX Plot > Stress > S1i - In-plane Maximum

 

ID_PLOT_STRESS_INPLANEMIN Plot > Stress > S3i - In-plane Minimum

 

ID_PLOT_FC_E ID_PLOT_FC_E_INV Plot > Strength Factors > SF-ub Strength/Stress

 

ID_PLOT_EXCESS_UB Plot > Strength Factors > dTub Excess

 

ID_PLOT_EXCESS_SUB Plot > Strength Factors > dSub Excess

 

ID_PLOT_NTUB Plot > Strength Factors > NSub Probability