Question

Which of the following is not true about moment coefficient?

(a) for torsionally simple supports the moment coefficient is greater than or equal to unity

(b) for torsionally simple supports the moment coefficient is less than unity

(c) moment coefficient accounts for the effect of differential moment gradient on lateral torsional buckling

(d) it depends on type of loading

The question was posed to me by my school principal while I was bunking the class.

Origin of the question is Lateral Torsional Buckling in chapter Design of Beams of Design of Steel Structures

Answer 1

Correct choice is (b) for torsionally simple supports the moment coefficient is less than unity

Easy explanation: The moment coefficient accounts for the effect of differential moment gradient on lateral torsional buckling and depends on type of loading. For torsionally simple supports the moment coefficient is greater than or equal to unity.