Reactions that don't make sense

[Anonymous]

Hello guys, 

At the moment I'm working on a building, and there is a column which is loaded by beams from two directions. The reaction of the column deviates with approx 200 kN from what I get in my hand-calculations. 

I then tried to split the area in two models where: 

Model 1 only contains the beam from the y-axis. 

Model 2 only contains the beam from the x-axis.

When I sum up the reactions obtained in model 1 and 2, I get the exact same reaction as I did in my hand calculation.

My question is: Why does the reaction from the 'whole' model not match the sum of the reactions in the split models?  

The reaction in the 'whole' model is in node no. 228, and the reactions in the split models are in nodes 324 and 7940. 

All three models are in one file attached to this post. (I know my decks aren't meshed, but that is how I need them to be in this project).

[Artur.Kosakowski · Accepted solution]

Hi @Anonymous

The distribution of forces is based on the structure deformation rather than tributary area therefore you may expect differences comparing to the other two models you created.

If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

[saclovitzky]

Try to modify the stiffness factor for rc beam, columns and walls.