Question

What is the value of imperfection factor for buckling class a?

(a) 0.34

(b) 0.75

(c) 0.21

(d) 0.5

The question was asked by my college professor while I was bunking the class.

My question is based upon Design of Compression Members in chapter Design of Compression Members of Design of Steel Structures

Answer 1

Right option is (c) 0.21

To explain: The value of imperfection factor, α for buckling class a is 0.21. The imperfection factor considers all the relevant defects in real structure when considering buckling, geometric imperfections, eccentricity of applied loads and residual stresses.