STR02 Shear Force and Bending Moment Diagrams w Example 01

Drawing Shear Force and Bending Moment Diagrams.
In this presentation we will introduce shear force and bending moment diagrams that are used for the design of members. We’ll start off with a discussion of the sign conventions that are used for internal shear forces and bending moments, then use a method of sections to plot the internal shear force and bending moment over the length of an example beam. Next, we’ll examine theoretical relationships between applied loads, internal shear forces, and internal bending moments by evaluating equilibrium equations associated with a differential beam element. After that, we’ll introduce a set of rules that can be used to draw shear force and bending moment diagrams more quickly than by using the method of sections and finally, we’ll conclude by using those rules to draw the shear force and bending moment diagrams for the example beam.
0:54 - Sign Convention for Internal Actions
4:42 - Example SF and BMD using Method of Sections
15:38 - Differential Beam Segment
19:20 - Rules for Drawing Shear Force and Bending Moment Diagrams
24:53 - Example SF and BMD using Jimbo’s Rules
31:34 - Finding the Location of an Inflection Point