Shear and Bending Moment Diagrams

Example: Use Method 1 to calculate the shear and bending moment

along the beam

Strategy: Pass sections along the beam where distributed loads, concentrated loads and/or concentrated moments occur in order to calculate the shear and bending moment in each section by summing forces and summing moments about the end point of the section.

Calculate the shear and bending moment diagram for the symmetrically loaded simply supported (pin at A and roller at C) beam shown below.

Pass two sections as shown below.

Next construct a FBD for each section starting with section 1 and sum forces and moments about the end point for the section.

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