SAP2000 SAP2000 Web Tutorial 1

Step 9: Assigning Frame End Releases
We will release the M3 and M2 moment at the ends of all non-moment frame girders, and release
M3, M2 and torsional moment at the ends of all braces.
1. Click in the window labeled X-Y Plane @ Z=24 to make sure it is active. Note when the
window is active, its title bar will be highlighted.
2. From the Select menu select Select and then Groups… from the submenu. This will display
the Select Groups dialog box.
3. Click on the group name ROOF once to highlight it, then, holding down the Ctrl key, click
on the Group Named 2ND to add it to the selection. Click the OK button.
4. From the Select menu select Deselect and then Groups… from the submenu. This will
display the Select Groups dialog box.
5. Click on the group name FRMGIRD once to highlight it and then click the OK button.
6. From the Assign menu select Frame and then Releases… from the submenu. This will
display the Frame Releases dialog box.
Note: The end releases will be applied incorrectly to the roof beams at the braced frames as
a result of this selection. We will fix that in items 8 through 18.
7. In this dialog box:
Check the Start and End boxes for Moment M22 (Minor) and Moment M33 (Major).
Click the OK button to apply the releases.
8. Note that releases are applied at the center of the braced frame roof beams. This is not
correct since the braced frame roof beams are continuous over the top of the chevron brace.
9. Click the Set Elements button on the main toolbar (or select Set Elements… from the
View menu). This displays the Set Elements Dialog box.
10. In this dialog box check the Local Axes box and the Labels box in the Frames area and click
the OK button. The local axes arrows appear as shown in Figure C-16.
SAP2000 Web Tutorial 1 48