RAM Structural System Help

Detailed Design Steps with Sample RSS Model

This section provides the user with detailed steps in using the RAM Concrete Wall module utilizing a sample RAM Structural System model. The model ShearWallDemo.rss, which is included with the product installation, is used in this Section.

  1. Start the RAM Structural System: Open the model ShearWallDemo.rss in the Data directory.
  2. Select a Reinforcing Bar Table: From the RAM Manager, go to Criteria > Concrete Tables. For the purposes of this demonstration, we will use ASTM reinforcing.
  3. Design the model: Run RAM Steel Beam, RAM Steel Column, and RAM Frame to establish sizes for all unsized members.
  4. Enter the RAM Concrete Wall Module: See Step 0 in the previous Section. Note that for this model, the stoplight for RAM Frame is green, indicating that the RAM Frame analysis has been performed and thus design forces are ready to be used by the RAM Concrete Wall module.
  5. Modify Display Settings: This step is not necessary but will make the walls in your model easier to see and work with during your session in the RAM Concrete Wall module.

    Go to View...Members. Go to the Gravity Beam tab and uncheck the Display button (upper left corner). Go to the Gravity Column tab and perform the same action. Select OK.

  6. Select the Design Code: See Steps in the previous Section. For the purposes of this demonstration, we will select ACI 318-05.
  7. Review the Design Code Parameters: See Steps in the previous Section. For the purposes of this demonstration, we will leave the settings as they are.
  8. Create Wall Design Groups: Select Assign…Wall Design Groups. Select Add Fence. Rubber band the “west”-most stack of walls in the model as shown below.

    Right click the mouse to bring the Assign Wall Design Groups dialog back. Note that the Wall Design Group number has now changed to 2, indicating that the next assignment will default to Wall Design Group number 2. The "new" indicated in parentheses denotes that no walls are currently assigned to Wall Design Group 2.

    In the same manner as above, assign the central "C"-shaped wall core to Wall Design Group 2 by rubber banding the entire core of walls. Assign the "east"-most stack of walls to Wall Design Group 3. Note that you may also assign walls one a time by using the Single command.

    You can review the assignments you have made by toggling the View Wall Design Groups located in the toolbar at the top of the main screen.

  9. Create Section Cuts: Click on the Elevation View button in the toolbar.

    Select Wall Design Group 1 (west-most group). Select Assign…Section Cuts…Add Automatic. Select the options shown in the figure below.

    Select Single, and select the Wall Design Group. You should see Section Cuts appear on the screen (see figure below). Select Close.

    Click on the 3D View button in the toolbar. Right click the mouse to bring back the Auto Generated Section Cuts dialog.

    Select Single, and select Wall Design Group 2.

  10. Create Bar Pattern Templates: Select Assign…Bar Pattern Template, then select Edit Templates at the bottom of the dialog. Note that you can also get to this menu by selecting Edit Bar Pattern Templates directly from the Assign menu. Specify the settings shown in the figure below.

    Select Add. You will see the Bar Pattern Template appear in the list at the bottom of the dialog. Select OK. You should now be back in the Assign Bar Pattern Template menu. Select the Bar Pattern Template that was added. Select Single. Click on each Wall Design Group that was created. Right click the mouse to bring the dialog back to the screen. Select Close.

    Review the Bar Pattern Template assignments by toggling the Bar Pattern display button in the toolbar.

  11. Create Load Combinations for Design: Select Combinations…Generated. Select IBC2003 in the Code for Combinations dropdown. Make sure the check box for each load case is selected. For the Rho parameter, select Use Calculated. Click the Generate button. Click OK.

    Verify that the check boxes for all the Load Combinations in the load combo list are selected.

  12. Design Wall Design Group 1: Select Process…View/Update. Select Wall Design Group 1 (west-most wall group).

    The View/Update dialog should appear shortly after issuing the command, populated with the completed design information.

  13. Review Axial-Flexural Design Results: Make sure you are on the Axial-Flexural tab within the upper-right corner of the View/Update dialog.

    Note the toolbar below the 3D view window on the left hand side of the View/Update dialog. Select the option to display the Section Cut labels (see red arrow in figure below).

    In the top, left corner of the View/Update dialog (above the 3D view window), select the Mouse Selects Section Cut option.

    You should notice that the cursor has turned to a set of cross-hairs. Select any Section Cut in the 3D view window. You will notice that the axial-flexural design results for the selected Section Cut are displayed in tabular form in the screen to the right within the Results tab. Each row in the spreadsheet corresponds to a load combination. Select one of the rows in the spreadsheet. You should see the locally (Mumaj, Mumin) and globally (Muxx, Muyy) oriented required moments for the selected load combination appear immediately below the spreadsheet.

    Select the Interaction Surface tab. The axial versus flexural plot that appears corresponds to the angle resulting from Mumaj and Mumin for the selected load combination, referred to as the β angle.

  14. Review Shear Design Results: Select the Shear tab in the upper-right corner of the View/Update dialog. Select any Section Cut in the 3D view window. Note that the information in the spreadsheet area is updated each time a new section is selected.
  15. Modify the Design: Change the design by trying a new Bar Pattern in one of the Wall Panels.

    Select the elevation view button in the toolbar above the 3D view window (see figure below).

    Select the Wall Design Group in the 3D view to bring up the elevation view of the Wall Design Group. Using the zoom command buttons above the 3D view, zoom in on the lower left pier at the first level. Select the bottom-most Section Cut.

    Change to Reinforcing select mode by using the drop down menu shown in the figure below.

    Select the vertical reinforcing bar at the far left end of the Wall Panel.

    Note that the corresponding bar is highlighted in the vertical reinforcing spreadsheet.

    Change the bar size to #11. Note that the Section Cuts for the Wall Panel to which the bar belongs have turned yellow, indicating that the design is not current and needs to be run again.

    Make the same change in bar size to the next four cells directly below. Note when a new cell is selected, the bar is highlighted in the 3D view window. Select the vertical bar at the far right end of the pier.

    Again, change the bar size to #11. Again, change the sizes of the adjacent four bars to #11 also. Select Analyze in the upper right corner of the View/Update dialog.

  16. Review the Design Results: Select any Section Cut and choose View Summary in the upper right hand corner of the View/Update dialog.