Question

Positive Bending Moment is also called as

• A. Sagging
• B. Hogging
• C. Bending stress
• D. Torsion

Answer 1

Answer:

A. Sagging

Positive bending moment is also known as sagging. When a simply supported beam is subjected to UDL, the bending moment will be positive. Sagging occurs when the upper layer of the beam experiences compressive stresses and the bottom layer experiences tensile stresses. Hogging, on the other hand, is negative bending moment where top fibres of the beam experience tension and the bottom layer experiences compression. Points of contra flexure are points of zero bending moment where the beam changes its curvature from hogging to sagging.