Question

The check for moment capacity of plastic section for V > 0.6Vd is given by

(a) Mdv ≥ 1.2Zefy/γm0

(b) Mdv ≤ 1.2Zefy/γm0

(c) Mdv > 1.2Zefy/γm0

(d) Mdv = 2.2Zefy/γm0

The question was asked during an interview for a job.

Enquiry is from Design Strength of Laterally Supported Beams topic in chapter Design of Beams of Design of Steel Structures

Answer 1

Correct choice is (b) Mdv ≤ 1.2Zefy/γm0

The explanation is: The check for moment capacity of plastic section for V > 0.6Vd is given by Mdv ≤ 1.2Zefy/γm0, where Ze = elastic section modulus of whole section, fy = yield stress of material, γm0 = partial safety factor.