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How can I perform a buckling check for a surface in RFEM?

Answer

If you want to perform a buckling analysis with shell elements, the add-on modules RF-STABILITY, RF-IMP, and RF-STEEL Surfaces are required.

Governing governing loading according to the linear static analysis.
The results of the governing CO are then used in RF-STABILITY to determine the lowest eigenmode (local deflection / buckling of surface).
With the result of RF-STABILITY, you can generate a pre-deformed structure in RF-IMP by scaling the mode shape to a maximum ordinate (maximum value of the initial deformation). The Maximum value of the initial deformation must be defined by the engineer.
Now, you copy the governing LC and dimension it according to the second-order analysis while considering the pre-deformed structure of RF-IMP.
The results are then used to perform a stress analysis with RF-STEEL Surfaces.

The attached video shows the general procedure once more.


There are already some very interesting technical articles on this topic on our website.

Keywords

Buckling Buckling Buckling Design Surface

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RFEM Other
RF-STABILITY 5.xx

Add-on Module

Stability analysis according to the eigenvalue method

Price of First License
1,030.00 USD
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
RFEM Steel and Aluminum Structures
RF-STEEL 5.xx

Add-on Module

Stress analysis of steel surfaces and members

Price of First License
1,030.00 USD