I have generated a pre-deformed equivalent model using RF‑IMP by means of a pre-deformed FE mesh. Is the equivalent model considered for all load combinations nov, or do I have to make further settings?


A pre-deformed equivalent model is not automatically activated for load combinations. You have to set this manually in the calculation parameters of the load combination. There, select the "Extra options" check box and activate the "Initial Deformation from Module RF-IMP" option.

To activate the option in several load combinations at the same time, use the option to select several load combinations.

The calculation with the pre-deformed FE mesh is performed if the corresponding load combinations will be calculated according to the second-order or the large deformation analysis.


Imperfection Pre-deformed FE mesh Load combination Calculation parameters Special setting

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RFEM Main Program
RFEM 5.xx

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
RSTAB Main Program
RSTAB 8.xx

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
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RFEM Other
RF-IMP 5.xx

Add-on Module

Generation of equivalent geometric imperfections and pre-deformed initial structures for nonlinear calculations

Price of First License
760.00 USD