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Theory of Structures - Engineering

Q1:

The yield moment of a cross section is defined as the moment that will just produce the yield stress in

A the outer most fibre of the section

B the inner most fibre of the section

C the neutral fibre of the section

D the fibre everywhere

ANS:A - the outer most fibre of the section

Yield moment: BM at which the first part of the section reaches yield stress.

Plastic moment: BM at which the entire cross section reaches yield stress.

So, always, PM>YM.