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2016-02-04

Critical Load Factor of Tapered Steel Frame 3: FE Model and RF-STABILITY

This post verifies the determined mode shapes or critical load factors of the previous beam structures using an FE model in RFEM (surface elements) and RF‑STABILITY.

You can create a model like this quickly in RFEM due to effective modeling tools ("Generate Surfaces from Members" here) and the well-arranged graphical user interface.

Critical load factors and the corresponding stability modes can be determined in RF‑STABILITY. For this, you can use the linear eigenvalue solver or nonlinear stability analysis.

In our example, the linear eigenvalue solver (Lanczos method) determines the critical load factor of 2.26, which corresponds to the previous models of the structure.

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