Question

Which of the following buckling does not occur in beam?

(a) lateral buckling of whole beam

(b) local buckling of web

(c) local buckling of flanges

(d) longitudinal buckling of web

I have been asked this question during an internship interview.

My enquiry is from Introduction to Beams topic in section Design of Beams of Design of Steel Structures

Answer 1

The correct answer is (b) local buckling of web

To elaborate: Buckling may take place in many ways : (i) lateral buckling of whole beam between supports, (ii) local buckling of flanges, (iii) longitudinal buckling of web and buckling in depth direction under concentrated loads.