Hi
I am working to Eurocode EN 1993-1-6 and I can see that I need to check for buckling Limit State
I was wondering if the buckling analysis in STAAD giving the buckling factors are similar to the elastic critical buckling ratio rRcr as defined in cl. 8.6.2 of EN 1993-1-6
Also, the standard further says that I need to find Plastic reference ration (rRpl) ( there is a formula in standard) by materially non-linear analysis...
Based on these two I can calculate overall buckling reduction factor and then calculate rRd which shall be greater than or equal to 1 to satisfy buckling limit state check..
Can some one please help me if
1. I am rightly interpreting elastic critical buckling ratio rRcr as load factor from buckling analysis of STAAD
2. How I can get Plastic reference ration (rRpl)
3. Can I do the imperfect analysis for the tolerances defined in Eurocode using STAAD?
Thanks for help in advance....
Regards
Paresh