Question

Which of following statement is correct?

(a) elastic buckling stress may be decreased by using longitudinal stiffeners

(b) elastic buckling stress may be decreased by using intermediate stiffeners

(c) elastic buckling stress may be increased by using intermediate  transverse stiffeners

(d) elastic buckling stress is not affected by intermediate or longitudinal stiffeners

I have been asked this question in an interview.

I would like to ask this question from Local Buckling of Plates topic in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Right choice is (c) elastic buckling stress may be increased by using intermediate  transverse stiffeners

The best I can explain: The elastic buckling stress may be increased by using intermediate transverse stiffeners (which will decrease the aspect ratio L/d, thus increasing the value of buckling coefficient), or by using longitudinal stiffeners to decrease the depth-thickness ratio.