[Ex. 04] Uniformly Distributed Load Shear Moment Diagram

Let's take a look at drawing the shear and moment diagram for a uniformly distributed load on a simply-supported beam! Graphically!
This video is part of the 'Shear Moment Diagram Examples' playlist:
• [Ex. 01] Shear Moment ...
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[@davispatel9110]

Thanks man! I am doing my final assignment at 2am and this is what I was looking for!!! Perfect!

[@robertbischoff2412]

That was a good refresher. I hadn't worked with these diagrams since 1982/83.

[@akielallen565]

Thank you so much for the bending explanation, for the life of me I could not fully understand it and you broke it down into the simplest form better than my actual professor. Please continue to spread your knowledge for us, you are appreciated!

[@SimmySigma]

Thank you so much! I really appreciate the kind words and I’m so glad that these videos have helped you 😊

[@Hitenp0301]

So quick question, how would you get a moment value at 1ft? where your shear is 30 ?

[@jameslila2254]

Sir cant we use the area of shear in drawng out the moment diagram?somehow^^

[@jzwillows]

Actually, If the load is a rigid solid their is no shear or moment since the load is transferred to the supports without causing deflection! For example, a steel bar supported by a steel bar

[@jakepettitt8719]

hello, from my first thoughts on this, I would say that you are correct to a certain extent, but I'm sure the point of these shear and bending moment diagrams are for idealized calculations without involving material compositions. If the load bar specifications are known and a material for the support bar needs to be determined , I imagine the shear/moment values calculated here would come in handy to promote proper factor of safety in the structure. An example that comes to mind is a simple bridge with two supports where the distributed load can be equated to some sort of upper layer of a different material. The correct length and properties of beam material need to be selected in order to prevent the bridge from collapsing, especially when a significant bridge length has to resist deflecting about its centroid. I found a quick article that exemplifies the simply supported steel beam being loaded with another bar where deflection about the center is calculated on the second page. www.raeng.org.uk/publications/other/15-beam-deflection
Please correct me if I am assuming anything wrong, your comment is interesting to an engineering student trying to figure things out :)

[@spnzl2400]

on the shear and moment diagram, why does it looks like its only 6 meters in length not 7 meters?

[@SimmySigma]

Great point! Please don’t take that diagram to scale. I only wanted to use various points along the span to show how the shear values dictate the slope and curvature of the moment diagram at different points. You could very well have used more or less points. Hope that helps!