12 September 2019

FAQ 003583 EN

Gerhard Rehm



An apparently insufficiently supported member does not lead to instability of the entire system. What is the reason for this?


The cause may consist in the definition of member eccentricities. For a better overview, the origin lines are automatically hidden for eccentric members. In some cases, it may appear that a member end is not sufficiently supported (see Figure 01, left). However, the meshed line acts in the background. This can clearly be displayed by hiding the members in the Display navigator (see Figure 01, right).

In Figure 01, the line at the common node has not been geometrically separated. For this reason, there is no graphical connection line representing the eccentricity, which would result in this case. However, because of the setting displayed in Figure 02, the node is still meshed with the vertical member.

To visualize the graphical connection line, it is recommended to divide the member or line at this node (see Figure 03).


Eccentricity Unstable Support


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RFEM 5.xx

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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

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