Question

What is the condition for equilibrium in plastic analysis?

(a) bending moment distribution defined by assumed plastic hinges must not be in static equilibrium with applied loads and reactions

(b) shear force distribution defined by assumed plastic hinges must be in static equilibrium with applied loads and reactions

(c) bending moment distribution defined by assumed plastic hinges must be in static equilibrium with applied loads and reactions

(d) shear force distribution defined by assumed plastic hinges must not be in static equilibrium with applied loads and reactions

I had been asked this question at a job interview.

This question is from Conditions of Plastic Analysis in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Right option is (c) bending moment distribution defined by assumed plastic hinges must be in static equilibrium with applied loads and reactions

Easiest explanation: The bending moment distribution defined by assumed plastic hinges must not be in static equilibrium with applied loads and reactions.