When determining internal forces in RFEM, I obtain compression axial forces that do not arise in the design internal forces in the design in RF‑CONCRETE Surfaces. Why, what is the reason?

Answer

For the structural components that are mostly subjected to compression, the preset optimization of the design internal forces can result in the compression axial force being assigned to the stiffening concrete strut.

Figure 01 - Design Details with Optimization of Internal Forces

In such cases, it is recommended to deactivate the optimization of design internal forces and not to use the optimization of design internal forces.

Figure 02 - Selection for Optimization of 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.

Figure 03 - Design Details Without Optimization of Internal Forces

Keywords

Deep beam Axial force Compression Wall

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  • Updated 10 November 2020

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