Despite no support, some nodes generate reactions
Question:
I came across an issue while modelling a cable bridge. I found that the reactions calculated from Midas and the calculation made by hand was inaccurate. I have given a few point loads on the bridge. But though I didn’t give any support reactions some forces are shown on z direction. You will notice it when you look at the model. Please be kind enough to clarify them
Answer:Dear User,
The nodal loads ( Fz) are assigned on the truss elements in transverse direction.
Truss elements can resist loads only when loaded along the longitudinal direction. ( i.e axial direction).
Hence you get reactions in FZ direction for load case LL .
Also the nodes do not intersect the element on which they are present. This again would affect the analysis.
You can divide them using Node/Element > Divide option.
I came across an issue while modelling a cable bridge. I found that the reactions calculated from Midas and the calculation made by hand was inaccurate. I have given a few point loads on the bridge. But though I didn’t give any support reactions some forces are shown on z direction. You will notice it when you look at the model. Please be kind enough to clarify them
Answer:Dear User,
The nodal loads ( Fz) are assigned on the truss elements in transverse direction.
Truss elements can resist loads only when loaded along the longitudinal direction. ( i.e axial direction).
Hence you get reactions in FZ direction for load case LL .
Also the nodes do not intersect the element on which they are present. This again would affect the analysis.
You can divide them using Node/Element > Divide option.