Karamba - structral analysis doesn't seem right

Dear all

I’m new to Grasshopper and Karamba. I have created a twisted bridge design in Grasshopper and wanted to do a structural analysis to find the displacement. However, the result didn’t seem correct and was ridiculous. Could anyone help me with this, please?
I’ve attached a Grasshopper file and a Rhino file for you to have a look. Thank you very much for your help.
Model.gh (80.4 KB)
Model Rhino.3dm (2.4 MB)

Hi @jamie.2211

it seems that your polylines are not exploded nor split at their intersections. All lines need to be split at their intersections otherwise Karamba does not recognise that these elements are connected.