Question

The effective width of cold-formed steel sections is given by

(a) be/b = (fcr/fy)[1-0.22√(fcr/fy)].

(b) be/b = (fcr/fy)[1+0.22√(fcr/fy)].

(c) be/b = (fy/fcr)[1-0.22√(fcr/fy)].

(d) be/b = (fcr/fy)[1+0.22√(fy/fcr)].

This question was posed to me in an interview for job.

I want to ask this question from Behaviour and Ultimate Strength of Plates and Possible Failure Modes in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Correct option is (a) be/b = (fcr/fy)[1-0.22√(fcr/fy)].

Best explanation: The effective width based on tests on cold-formed steel sections is given by be/b = (fcr/fy)[1-0.22√(fcr/fy)]. This formula was first adopted in AISC specification for light gauge cold-formed sections.