Convert the reactions to forces.
First explanation. The purpose is that one structure would work completely independent from another structure. For example I have the wood roof on the steel truss. In case the roof wood elements would be destroyed the truss will carry the loads from the roof. In one model the steel truss share the forces with wood element. That is why the idea is to apply to the steel truss reactions of the roof as forces.
Additional explanation. I need to replace the structure with forces. If I add the structure, this structure will carry (share) the forces. I do not need it. I need to see the impact of forces only. Without the wood beams the steel truss will get higher displacement and in the elements of the steel truss will be higher Fx forces in the steel elements of the truss.
Conclusion. I can apply the reactions as node loads. I did so and it works perfectly, but it takes time. I thought that there would be kinds of solution to do it faster and easier. Thank you.
