Hydrostatic pressure on a half circle
A small example that shows how to model hydrostatic pressure on a circular structure in SOFiPLUS(-X).
It is important to define the free line load of Type Pz = load local z. The z-axes of the beams have to point to the center of the circle. As direction of projection choose "Projected in Y-Z (XX)".
If you have a larger model, it might be necessary to reference the load to the structural lines and also the appropriate group numbers.