Shear force and bending moment diagrams

AI Thread Summary
The discussion focuses on drawing shear force and bending moment diagrams for a simply supported beam. The user seeks assistance in determining the greatest shear force, bending moment values, and the specific bending moment at point D. A suggestion is made to take moments from point A to find the bending moment at D, using the formula that incorporates the area under the shear force diagram. Labeling points on the shear force diagram (SFD) is recommended for clarity. The conversation emphasizes the importance of accurately calculating and representing these values in structural analysis.
Stacyg
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Hi. The question is:
Draw the shear force and bending moment diagrams for the simply supported beam shown below. State the values of the greatest shear force and bending moment, and the bending moment at D.
The diagram is attached as is my attempt at the answer. I hvae not stated the values of greatest shear force, bending moment or shown the bending moment at D as I am not sure how to do this.
Also with my Bending moment diagram I am not sure if I have started it right.
Any help would be great thanks.
 

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It's been awhile since I've done this but hopefully I can help a little.

I can't read your SFD too well, but to solve for the bending moment at D..

Take moments from point A

Ma = 0 kn . mm
Mb = 0 + (Length x Width on your SFD)

The bending moment at D will be Mc + (Bound area from C-D)

Labeling the points on your SFD should help you out with this.
 

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