Hello,
I am currently trying to compare the results in STAAD.Pro to an example provided by the AISC Guide 28 (Example 3.2). I am able to match the results of the axial load, but the moments in the beam-to-column and midspan of the beam are significantly different. I have noticed that the notional load has a significant effect on the moment and I am wondering if this may be the source of the error. Does anyone have any experience with this? Here is how I defined the Direct Analysis Method:
MATERIAL STEEL ALL
DEFINE DIRECT ANALYSIS
FLEX 1 ALL
FYLD 7200 ALL
NOTIONAL LOAD FACTOR 0.002
END
Then in each load combination I specified the notional load in the following way:
LOAD 103 COMB3 = 1.4(D) + NY
REPEAT LOAD
1 1.4
NOTIONAL LOAD
1 X 0.002
Finally, I gave the perform direct analysis command.
PERFORM DIRECT ANALYSIS LRFD ITERATION 15 PDITER 15
And I printed the results like so,
LOAD LIST 103
PRINT MAXFORCE ENVELOPE LIST 1 2
PRINT SECTION DISP LIST 1
Is this the correct way to read the results?
If someone could provide some type of guidance that would be much appreciated. Also, if you would like to take a look at my input code please let me know. Thank you!
Lauren