Joint yield


In my model shell and beams are connected. i wanna set joint yield force, like in the pic.
When T reaches 36.75KN this connection have to yield. Can i do something like this in karamba?
I tried beam joint agent component, but when i tried, something occurs and beam viem says null vector in displacement and utilization of element says Max value. this means stress is too big right?!
analysis.help5|690x435 (93.3 KB)