Modelling wind bracing systems

Hi everyone,

I am trying to model this simple rectangular frame to analyze a wind bracing system.

The issue I have is that the wind bracing elements take part of the vertical load of the floor, which they souldn't because they're supposed to respond only to horizontal loads.

I think the problem is in the "beam-beam joint" modelling or maybe in the fact that I should use a "spring cross section" for the wind bracing elements.

Does anyone have some suggestion on how to solve this problem? I attach my .gh definition of the problem.

I thank you in advance,

Davide.