3
Shear Force and Bending Moment
SHEAR FORCES AND BENDING MOMENTS
Shear force. The shear force S at any cross-section of a horizontal beam is the algebraic sum of the vertical projection of all forces (including reactions) to the left of the given cross-section (where, in the sum, the projection of a force is positive if its direction is upward and negative if its direction is downward).
Bending moment. The bending moment M at any cross-section of a horizontal beam is the sum of the moments about the given cross-section of all the forces (including support reactions) to the left of the cross-section (where, in the sum, a clockwise moment is positive and an anticlockwise moment is negative).
Consider a simply supported beam AB subjected to various ...
Get Engineering Mechanics now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
