Applies To
	Product(s):	STAAD.Pro
	Version(s):	ALL
	Environment:	ALL
	Area:	Analysis Solutions
	Subarea:	Buckling Analysis
	Original Author:	Sye Chakraborty, Bentley Technical Support Group

 

How can I restrict STAAD.Pro to carry out buckling analysis for certain load cases only ?

By default, the program calculates buckling factor for all primary/REPEAT LOAD cases but you can insert a PERFORM ANALYSIS & CHANGE after the cases for which you do not need to carry out buckling analysis. After the CHANGE, specify the loads for which BUCKLING ANALYSIS us required. A sample piece of code is provided below.

LOAD 1
ELEMENT LOAD
41 TO 72 PR -1
LOAD 2
JOINT LOAD
11 33 FZ -20
22 FZ -100
...
LOAD 12
REPEAT LOAD
1 1.2 2 1.2
PERFORM ANALYSIS
CHANGE
LOAD 13
REPEAT LOAD
1 1.0 2 1.0
LOAD 14
REPEAT LOAD
1 1.2 2 1.4
PERFORM BUCKLING ANALYSIS
CHANGE

...

In the above example the BUCKLING ANALYSIS would only be carried out for cases 13 and 14 and will not be carried out for cases 1 to 12.