Steel Structure Analysis in RFEM 6 and RSTAB 9

[@BoZhaoengineering]

RFEM 6 is improved, compared to RFEM5. The graphic input is relatively the same. However the structural concept of effective length and buckling load is set to more visual in the current version.

[@DlubalEN]

Hi, @BoZhaoengineering! Thanks for your positive comment. We are always working on improving our software :)

[@mr.d3916]

I've learned so much in this webinar. Especially about concepts of critical buckling load and effective length. Usually the lateral buckling effective length governs and not the bending about the other principal axis. My question in the stability analysis why the software still gives the effective length of this other principal axis longer than the member length when in fact its effective length must be only equal to the member length because of the restraints of the web members? Like in this video, the presenter used k equal to 1.0 to this other principal axis. Does the program always compute the effective length of both principal axis based on the critical buckling load not on the buckling shape?

[@DlubalEN]

Hi, MR.! the critical load and the effective length are actually calculated for each member and for each direction, because the program cannot decide whether these are relevant or not. Iin the background, the stability analysis only determines the critical load factor for the entire model and from this the further results are determined.

[@mr.d3916]

@@DlubalEN Thank you very much for the response. For me this is the best webinar of Dlubal with regards to the concept of critical buckling load and effective length including their applications to the software. Kudos! Indeed RFEM is the best for steel design.

[@DlubalEN]

Hi, MR.! Thanks a lot for your great feedback :-)