To what extent does RFEM consider the inserted reinforcement when determining the stress or internal forces? Is the entered reinforcement only taken into account by the RF‑CONCRETE Surfaces add-on module?


When determining surface stresses or surface internal forces in RFEM, the entered reinforcement is initially not taken into account.
In this case, RFEM applies the isotropic linear-elastic material model.

However, you can optionally use the RF‑CONCRETE NL add-on module to perform the nonlinear serviceability limit state design in the RF‑CONCRETE Surfaces add-on module. Here, you can define the provided reinforcement before the calculation.
The add-on module determines nonlinear stiffness, taking into account the applied reinforcement and the cracked state.

You can then optionally export this nonlinear stiffness to RFEM and activate it for a new calculation of the surface internal forces for the individual load cases and load combinations.


Concrete Nonlinear design Reinforcement Provided basic reinforcement CONCRETE NL RF-CONCRETE Surfaces Cracked state State II (cracked) Surface internal forces Export Linear-elastic

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RFEM Concrete Structures

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

Price of First License
810.00 USD
RFEM Concrete Structures

Add-on Module

Physical and geometrical nonlinear calculation of beam and plate structures consisting of reinforced concrete

Price of First License
1,300.00 USD