The display of internal forces for couplings (coupling members, rigid members) is deactivated by default in RFEM 6 / RSTAB 9. However, you can quickly enable the display of internal forces and deformations for these member types under the Navigator - Results - Members options by selecting the "Results on Couplings" checkbox.
Coupling or Rigid Member Result Display
How can I display the internal forces of a coupling member or rigid member in RFEM 6 / RSTAB 9?
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The coefficient θ is calculated as follows:$$\mathrm\theta\;=\;\frac{\displaystyle{\mathrm P}_\mathrm{tot}\;\cdot\;{\mathrm d}_\mathrm r}{{\mathrm V}_\mathrm{tot}\;\cdot\;\mathrm h}\;$$
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.
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Using the "Damper" member type, you can define a damping coefficient, a spring constant, and a mass. This member type extends the possibilities within the Time History Analysis.
With regard to viscoelasticity, the "Damper" member type is similar to the Kelvin-Voigt model, which consists of the damping element and an elastic spring (both connected in parallel).