T.2 Specifying the analysis type

The analysis type for this structure is called P-Delta.

Since this problem involves concrete beam and column design per the ACI code, second-order analysis is required and has to be done on factored loads acting simultaneously. The factored loads have been created earlier as cases 4 and 5. Now is the time to specify the analysis type.

The STAAD input file commands generated are:

PDELTA ANALYSIS SMALLDELTA

On the Analysis and Design ribbon tab, select the Analysis Commands tool in the Analysis Data group.

The Analysis/Print Commands dialog opens.

Tip: If the Analysis/Print Commands dialog does not open automatically, then click Define Commands in the Analysis - Whole Structure dialog.
Select the PDelta Analysis tab.

Note: Leave the parameters on this page as their default values and options.
Click Add.
Click Close.

Tip: Remember to save your work by either click Save on the File ribbon tab , the Save tool, or pressing <CTRL+S>.