RISA - Diverging Error Message 1

[jchi]

I am designing a 30' tall 17'x17' square tower to support a loadout bin (245k DL+LL). Problem is that my model keeps diverging under DL+LL and load cases with wind perpendicular to drive through dimension. The structure is braced on all sides with x-bracing except where it is open for the truck drive. I tried bracing all sides full height across truck drive and the model is still and diverging, which does not make sense since it is full braced all sides. The biggest quesion is why am I diverging under DL+LL. This model is being run with W12x79 columns - not little columns.

Any suggesttions??? I'm stumped. I could forward my model if interested in looking at it in detail.

Thanks,
Jeff

 

[DWHA]

If your cross bracing is set as tension only, change it to euler buckling.

 

[jchi]

DWHA

That was the problem, THANKS FOR THE HELP!!!

Jeff