FAQ 003514 EN-US

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

I obtain different results when comparing the deformation analysis in the RF‑CONCRETE add-on modules and another calculation program. What could be the reason for this?

Answer

The differences resulting from the determination of the deformation in the cracked state can have various causes. In the case of deviations, you should check the following points:

Is the same calculation method applied?
RF‑CONCRETE Deflect uses the analytical analysis approach according to EN 1992‑1‑1, 7.4.3.
RF‑CONCRETE NL uses the physically nonlinear analysis approach.
You can find more information about the calculation methods in Chapter 2.7 and Chapter 2.8 of the RF‑CONCRETE Surfaces manual.

Is the same initial structure available?
If considering the underlying structural system as equivalent, the results of the linear calculation can be considered in the best way. The linearly determined deformation of the underlying combination should be approximately equal. Possible differences in the linear deformation may be increased in the cracked state in connection with the deformation analysis.

Are the same effects taken into account?
When comparing, make sure that the same effects, such as creeping and shrinkage, are taken into account (Image 02).

Are the same initial values available?
In connection with the deformation analysis, you should further check if the same initial values are available. In this case, a special attention has to be paid to the fact whether the applied reinforcement (Image 03) and the lever arm or the concrete cover are the same.

If you cannot find the cause after the fundamental examination, please contact our hotline.

Keywords

Comparison Program comparison Deformation calculation State II (cracked) Nonlinear Differences Cause Frilo RIB D.I.E.

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RFEM
RFEM

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM
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Add-on Module

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

Price of First License
810.00 USD
RFEM
RF-CONCRETE Deflect

Add-on Module

Analytical deformation analysis of plate structures consisting of reinforced concrete

Price of First License
400.00 USD
RFEM
RF-CONCRETE NL

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
RSTAB
RSTAB

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD
RSTAB
CONCRETE

Add-on Module

Linear and nonlinear analysis of reinforced concrete members with reinforcement concept

Price of First License
810.00 USD