Question

Which method is used when mechanism is applied to structures with sloping members?

(a) method of instantaneous centre

(b) method of centre

(c) method of seismic centre

(d) method of metacentre

I got this question by my school principal while I was bunking the class.

The origin of the question is Plastic Design of Portal Frames, Effect of Axial and Shear force on Plastic Moment Capacity topic in section Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Right choice is (a) method of instantaneous centre

The best explanation: When mechanism is applied to structures with sloping members, the determination of displacements in the direction of applied forces is required. It is done using method of instantaneous centre or centre-of-rotation technique.