Prestressed beams in a slabsystem

Grasshopper Karamba3D
1

Hello everybody,

for my Master Thesis I want to create a slab 4x5m which is mainly hold by four prestressed beams. On top of the beams I planned to place the “refined” stresslines from the whole ceiling as a beam-grid structure.

I now tried to use Karmaba to get the right dimensions for the prestressed beams and if possible a optimized height for the top layer grid. I want to find the optimum dimension for my prestressed rope/cabel in the beam and the best height/width of the beam itself.

I have tried to adapt things from other topics about prestressing but my numbers for displacement stay the same when I change the prestressing strenght. I think something is wrong in my definition and I hope someone can help me out in this case. I´m also not sure how to later add the results of the prestressed beams to my “stressline grid” to find the best dimensions for the top layer, probably the right way is to run it together with the prestressed beams but first I need to get the prestress problem solved.

Here is my definition: 23-08-30 D01 dimension of beam and ceiling-1.gh (258.8 KB)

Any help is appreciated :slight_smile:

  • Anton