unexpected results on a static analysis


Hello,
I am a master degree student and i'm currently try to solve a finite element problem for a school project.
I want to run a a static analysis about a structure that is supporting concrete blocs. I've linked a picture of the problem to this message.
The concrete blocks contact with the structure is not continuous. I have linked a picture of my Hypermesh model with the contact highlighted in white.
I use a pressure reparted on this white area to model the actions of the concrete blocks on the structure. The concrete bloc is not deformable.
The third picture coresspond to my simulation results.
I am not sure these results represent the reality because as I mentionned before, the concrete block is not deformable so the structure is not supposed to bend that much in the middle area. I suppose the software consider that these pressures are independent, so how should I proceed to make Hyperwork understand that all these pressures belong to a same solid in order to see the 'pillars' of the structure being deformed instead of the middle area ?
For this type of loading (mass that has a complex contact with the structure) should I run a multi-body simulation instead ?
I don't know if my questions are clear, feel free to ask me some more details if you don't understand it.
(i've linked in 4th picture the constraints in the structure)
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