A. To specify a P-Delta analysis
To instruct the program to perform a second-order, P-Delta analysis, use the following procedure.
-
Either:
- select the Analysis page
- on
the
Analysis and Design ribbon tab, select the
Analysis Commands tool in the
Analysis Data group
The Analysis/Print Commands dialog opens. - Select the PDelta Analysis tab.
-
Select the P-Delta option to use for the analysis:
Option Details Use Large and Small Delta Used to include effects of member deflection (i.e., P-δ effects). This option is recommended. Use Large Delta Only Used to only consider effects of structure drift (i.e., P-Δ effects). Use Stress Stiffening effect of the KG matrix Used to include stiffening effects of the KG matrix. Refer to Notes for Stress Stiffening Matrix (Option 2) for details on this option. - Type the Number of Iterations to use.
- Select the Print Option you want to use.
-
Click
Add.
The PDetla Analysis command is added to the input file.