Unformatted text preview: Positive Negative SIGN CONVENTION OF SHEAR FORCE
AND BENDING MOMENT
The internal bending moment is considered positive if
it causes compression of the top fiber of the structural
member under consideration as shown below.
Negative other wise. Tension at Bottom Positive Moment Tension at top Negative Moment STEPS OF CONSTRUCTING SFD
1. Draw FBD and solve for support reactions
2. Calculate the shear force along the member from left to
right “Shear force due to distributed loading can be
calculated as the area underneath the load.
3. Draw SFD bas...
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