Multiple parts Reinforcement profile analysis

[GoncaloPT]

Hello!
I'm having some issues analyzing the structural integrity of sliding window when subjected to wind pressure perpendicular to the glass panes.
I have two glass panels supported by some aluminium frameworks profiles with a steel reinforcement bar ( see image bellow). I can take the area moment of inertia for each component individually, but i'm not sure on what to consider for the global inertia as the connection between the two aluminum profiles isn't rigid and allows for rotation between them.
I would like to get a proper deflection for the framework.

I'm also not sure on how to evaluate the maximum bending moment allowable for the assembly of the two aluminum parts and the steel bar.

Can anyone please give me some guidelines on how to proper analyse a situation like this? Any help is much welcomed.

 

[KootK]

I can take the area moment of inertia for each component individually, but i'm not sure on what to consider for the global inertia as the connection between the two aluminum profiles isn't rigid and allows for rotation between them.

1) I wouldn't normally assume that the two aluminum profiles, in two different lites, share a common load.

2) Like you, I would assume that aluminum profile #1 and the steel bar do not behave compositely because there isn't much of a mechanism for longitudinal shear transfer between the two. So your stiffness is just the sum of the local Ix values. I know that some curtain wall guys will rely on friction for this but I'm not sold on the idea.

I'm also not sure on how to evaluate the maximum bending moment allowable for the assembly of the two aluminum parts and the steel bar.

3) Apportion your load to the various cross sections according the ratio [Ix_part / SUM (Ix_parts)]

4) Remain cognizant that different parts of the different cross sections may reach their respective yield / buckling loads at different points in the load history of the combined member.