Not at all. If the value of alpha*crit (the critical buckling value without torsional stiffness) is displayed in red and thus amounts to "0", there is no reduction of the imperfection factor (European lateral-torsional buckling line). The basic value for the imperfection factor is used.
Question
I am performing an analysis according to General Method 6.3.4 EN 1993‑1‑1 and have activated the addition "Adapted Method According to Naumes". The critical factor α*crit is displayed in red. Should I be worried?
Use the "Independent mesh preferred" option in the FE mesh settings to create an independent FE mesh for the integrated objects. This allows you to generate a significantly more detailed and precise FE mesh for individual objects that are integrated into one another.
In the "Edit Section" dialog box, you can display the buckling shapes of the Finite Strip Method (FSM) as a 3D graphic.
In RFEM 6 and RSTAB 9, you have the option to enter "Visual Objects" as guide objects. You can import the file formats 3ds, stl, and obj.
These objects allow you to create a better reference to the dimensions.
Do you have individual column sections and angled wall geometries, and need punching shear design for them?
No problem. In RFEM 6, you can perform punching shear design not only for rectangular and circular sections, but for any cross-section shape.