FAQ 003562 EN

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

In the RF‑/STEEL EC3 add-on module, I have selected two bracings with the same size as the shear panel type in the "Parameters" window for a beam to be designed. Thus, the beam should be supported laterally in the middle. Why is the eigenvector arbitrary anyhow?

Answer

The term "shear panel" indicates that the translational spring, which is created along the beam length by means of the shear panel type including the corresponding parameters, is smoothed, see Image 01.

This is also the case of the "Bracing" shear panel type, so that the mode shape always seems to be arbitrary at this location, see Image 02.

In order to obtain the exact results, it is recommended to manually define the lateral support by using a nodal support according to the general method (Image 03) or to define the effective lengths according to the equivalent member method, including intermediate lateral restraints, if necessary. Thus, a mode shape with the visible lateral restraint is created in the mid-span (Image 04).

Keywords

Shear panel Bracing Lateral restraint Mode shape

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  • Updated 16 June 2021

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RFEM
RF-STEEL EC3 5.xx

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RSTAB
STEEL EC3 8.xx

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD