COLUMN DESIGN

[sudu]

In case of column design can anyone tell me what does ,lower stress but lower buckling load suggest regarding behavior of column

 

[apsix]

As 'load = stress x area' I don't understand why you ask 'lower stress but lower buckling load'.

Some more explanation may help.

 

[demayeng]

Maybe it suggests that the effective length is longer? Depends what context as apsix says..

 

[Lion06]

It suggests it's not an efficient section to use.

 

[slickdeals]

I think it might be too slender as well.

 

[Lion06]

I'm re-reading your post (because it didn't quite make sense to me the first time around). Do you mean you are comparing two sections (to resist a given load) and one has a lower actual stress, but that same section also has a lower buckling stress?

If that's the case, it means that even though your total area increased (to get the lower actual stress), your least radius of gyration decreased (resulting in a lower buckling mode).

It also suggests that the section is in an area of elastic buckling and the stresses are being governed by that and not yielding of the section. If you have smaller kL/r values, the critical stress approaches the yield stress and small changes in L or r don't make as big of a difference in the critical stress.