Hi there, please I am working on a steel frame design that includes OWSJ in the model. I have tried various forms of releases for the joist members like assigning truss parameter to the diagonals and verticals, releasing moments at the ends etc. but when I run the analysis I get the following errors – member design failed for member xxx, Load case xxx has infinite or nan values and it doesn’t show utilization results too
I have looked through the forum and it looks like it has to do with the member releases but I’m still not able to solve this. Can you please look through my attached model to see if I’m doing anything wrong? Your response will be very much appreciated. Thanks.
The attached model has not been run yet as it takes some time to run but maybe you could take a look at my code file (loading, releases etc.) prior to running to see if I missed anything.
Frame model release variation1.STD
ok thanks for your help
Yes, but if you release them at the top and bottom that's fine.
You mean for the x bracing?
That sounds okay. If it makes you sense you might want to consider going with 2 members that cross without connecting.
Thanks for your response. You pointed out a huge error on my part. Node 2329 is not useful and should have been deleted. It was my master node when I used master-slave specification to model diaphragm but apparently I forgot to delete the node or merge the members.
When you say I can't have x bracing where all four members are truss members what would be an alternative?
I agree with you those members need not be truss members. I will release the moments at the top ends of the member and remove the truss specification for those members. Let me know if you disagree or have any other suggestions. Thank you!