Form: Punching Shear Design Overwrites
Use the Punching Shear Design Overwrites form to apply design overwrites for the selected joint object(s). These joints may be at a column, support, or load location. The various options on this form include the following:
Note: Joint objects may be displayed in the active window by clicking the View menu > Set Display Options command and checking Joint Objects on the Set View Options form.
Check Punching Shear drop-down list. Specify whether or not punching shear should be checked. When Program Determined is selected, punching shear will be checked and the following options will be available. Select No if punching shear is not to be checked – in this case, the following options will not be available.
Location Type (See Tooltip) drop-down list. Select the location of the column, i.e., whether it is an interior, edge, or corner column. Choose Auto from the drop-down list if the program is to determine the column location, otherwise choose one of the Interior, Edge, or Corner options. Location type affects the calculation of the allowable punching shear. A sketch illustrating the placement of the edges and corners will display by “hovering” the mouse cursor over the words Location Type.
Perimeter drop-down list. Specify how the perimeter for the punching shear calculation should be determined.
Auto. Select this option if the program is to determine the perimeter distance.
Specified Perimeter. Select this option and click the Specify button to input the perimeter coordinates using the Punching Shear Specified Perimeter form. Specify a segment as null in the spreadsheet if it is not to be used in the perimeter calculation (e.g., at a slab edge).
Specified Support/Load Size. Select this option and click the Specify button to input the support/load dimensions using the Punching Shear User Specified Support/Load Size form. The program calculates the punching shear perimeter from these values. Use the Counterclockwise Angle edit box to rotate the orientation of the rectangle defining the perimeter.
Effective Depth drop-down list. Specify how the effective slab depth should be determined.
Auto. Select this option to have the program determine the effective slab depth of the punching shear perimeter.
Specified. Select this option and then specify the effective slab depth of the punching shear perimeter in the Use Effective Depth Value edit box.
Openings drop-down list. Specify how openings are to be determined in the punching shear calculation.
Auto. Select this option to have the program determine if there are openings in the punching shear region.
Specified. Select this option and click the Specify button to input the geometry for either rectangular or circular openings on the Punching Shear Specified Openings form. On that form, click in the Opening Shape column in the area to select Rectangle or Circle, and then input location and size values in the other column edit boxes. Add additional openings in the same manner. These openings are used only in the punching shear calculations - they do not appear in the model.
Reinforcement Allowed drop-down list. Specify whether or not reinforcement will be allowed to supplement the concrete slab in the punching shear calculation.
No. Select this option to not allow reinforcement.
Rebar Ties. Select this option to allow rebar tie reinforcement. When this option is chosen, the reinforcement spacing is the spacing of single leg stirrups.
Stud Rails. Select this option to allow stud rail reinforcement. When this option is chosen, the reinforcement spacing is the spacing of the studs
Reinforcement Pattern drop-down list. If reinforcement is allowed, specify the pattern of the reinforcement, either Orthogonal or Radial.
Reinforcement Fy edit box. If reinforcement is allowed, specify the yield strength in the edit box.
Reinforcement Diameter. If reinforcement is allowed, specify the diameter in the edit box.
Reinforcement Spacing. If reinforcement is allowed, specify the spacing in the edit box
Access the Punching Shear Design Overwrites form as follows:
Select one or more joint object(s) to which the overwrites should be assigned.
Click the Design menu > Concrete Slab Design > View/Revise Punching Check Overwrite command.