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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Stand-Alone Steel Structures
CRANEWAY 8.xx

Stand-Alone Program

Design of crane runway girders according to EN 1993-6 and DIN 4132

Price of First License
1,480.00 USD
RSTAB Steel and Aluminium Structures
FE-LTB 8.xx

Add-on Module

Lateral-torsional buckling analysis of members according to the second-order analysis (FEM)

Price of First License
900.00 USD
RFEM Steel and Aluminium Structures
RF-FE-LTB 5.xx

Add-on Module

Lateral-torsional buckling analysis of members according to the second-order analysis (FEM)

Price of First License
900.00 USD