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2019-04-08

Flexural Buckling Analysis with Multiple Sections and Materials

Is it possible to integrate several sections with different materials in the flexural buckling analysis, or how can I apply several sections together?


Answer:

It is possible to model any cross-section with SHAPE‑THIN and to perform a stress analysis within SHAPE‑THIN or, for example, with STEEL in RSTAB.

The FE‑LTB add-on module can be used for the stability analysis of general cross-sections. Add-on modules such as STEEL EC3 depend on the respective standard, which may cause problems for user-defined cross-sections. Such cross-sections are not covered by the standard, and the stability analysis is only valid for certain cross-sections.

For cross-sections consisting of several materials (hybrid cross-sections), you can also use FE‑LTB. The stiffness of a cross-section created in SHAPE‑THIN can be displayed in RFEM, but there are no options for the stress analysis. Therefore, the approach would be as follows:

  1. Create the cross-section in SHAPE-THIN.
  2. Import the cross-section into RFEM and set the reference material correctly.
  3. Calculate the internal forces with FE‑LTB.
  4. Perform the stress analysis in SHAPE‑THIN.

Author

Mr. Günthel provides technical support for our customers.

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