We have tried to compare the results of V22.04.00.40 & V22.05.00.131 prior to shift to the latest update - same STAAD file (no modifications).
As shown in the snapshot, significant post-processing output differences were found.
The largest differences noted were on the Wind Load Cases.
The STAAD Generated Wind Load values, however, were found to be the same.
So it must be a change in the calculation/routine that caused the significant difference.
Can anyone please clarify the wind load calculation procedure for Update 5?
To further clarify, since attached link was focused on temperature load, the bug is actually due to the TRUSS specification, correct?
Can you also inform when the next version release would most likely be?
Thanks!
Yes, the issue is related to TRUSS specification and some loadings on it. The current plan is to release the next version in March.
I tried the member release workaround you suggested, I also removed the Temperature load to eliminate its effect.
However, I still get significant differences for the Wind Load Cases ONLY. (snapshot is for the Beam End Forces output).
I have sent another excel file with tabs for the trials I have made.
a) No Truss specification, only member release.
b) No Temperature Load but with Truss Specification
c) No Truss Specification, No Temperature Load.
I think besides the TRUSS Specification bug, the issue here is really with the wind load routine. Please advise.
It seems that wind load generated between both models is slightly different. I will try to figure out why this happens. However, is a difference of about 0.3% really so significant?
It's the effect of this difference in the output that is significant especially under Direct Analysis. Members that passed in Update4 are now failing in Update5. We are still taking a look at what else could have changed but your help would be great to hasten the investigation. This is actually the first time we encountered significant differences in the output of STAAD versions.