Simple Steel Lifting Frame Analysis. Please Help!

Hi there,

I am trying to model what would appear to be a simple steel lifting frame with 1 bracing member. I have so far created a model but I am getting quite a few warnings when attempting to analyse about zero stiffness in members etc. (I think this is due to using tension only members for the cables). I have attached the Staad file and the CAD drawing of what I am trying to model. All I am trying to do is model a frame with all pinned connections held in place by tension cables to determine all forces and moments acting on the structure to make sure that it matches my hand calculations. The lifting frame is meant to hold up a force of 240kN from the crane hook (the node at the top) or a force of 60kN at each of the corner frame nodes. I applied 60kN to the corner nodes and just put a pinned support at the crane hook. I would love to be able to get this model working.

Any assistance would be greatly appreciated. Steel Lifting Frame_edited.std

Parents Reply Children
No Data