FAQ 002248 EN-US

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

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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  • Updated 11/08/2020

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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