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I am trying to manually check the deformations from the CRANEWAY add-on module. However, I obtain great deviations. How to explain the differences?

Answer

The internal forces and deformations are determined according to the second-order analysis for torsional buckling, taking into account 7 degrees of freedom. For a linear calculation of deformations, a vertical/horizontal load only results in one vertical/horizontal deformation. Since the internal forces refer to the deformed structure and there is a nonlinear analysis, this is not valid for the second-order torsional buckling analysis.

In RFEM and RSTAB, you can check the deformations in the shear center by using the RF‑/FE‑LTB add-on module (see Figure 02). The deformations that additionally result from the displacements or rotations can only be checked with a surface model in RFEM.

Keywords

Deformation Horizontal displacement Second-order torsional buckling analysis Deviation

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  • Updated 8 November 2020

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