Hello

I have this small arch bridge that is going to be filled with soil to distribute the loads. What is the best way to model this in SOFiSTiK? Can i use line constraints? Or is there another way?

Hi,

one option could be to fill the gap with BRIC elements. These elements distribute the load, have a self weight and solve your problem. Please note it is not possible to create BRIC elements in a graphical way, e.g. with SOFiPLUS.

Using the picture above you can add a PROG SOFIMSHA; SYST REST in your file. With different commands you can create the volumen mesh. See also TEDDY examples SOFiMSHA - volume meshing.

Hope that helps.

Thank you very much. Will check it out.

Perhaps there is a difficulty: the brics have their own stiffness (like real soil also). This may lead to different quadresults then expected. Thats why the bric-stiffness should be low (AQUA-material or ASE-GRUP or …).

For simple deadload-geometry it might be enough to use VOLU in SOFILOAD. For the nonlinear-quad-ASE-example “arch_bridge.dat” for instance:

`+prog sofiload $ test VOLU-Lasten`

let#soilweigth 19; let#soil_archcrown 1.00

lc 902 titl ‘soil’; volu qgrp 0 type pzp z -(16+#soil_archcrown) p1 #soilweigth

end

But by variabel quadthickness, inclined road and so on is a exactly load not so simple.

It would be best to use some analytic method to distrubute point load (at level of road surface) by boussinesq subspace method in sofiload