Question:
When determining internal forces in RFEM, I obtain compression axial forces that do not arise in the design internal forces when designing in RF‑CONCRETE Surfaces. What is the reason?
Answer:
For structural components predominantly subjected to compression, the preset optimization of the design internal forces can result in the compressive axial force being assigned to the stiffening concrete strut.
In such cases, we recommend deactivating and not using the optimization of design internal forces.
With this setting, the internal forces are not optimized and the compression force arises in the design internal forces. In the example shown, the compression force is absorbed by concrete in both situations.