Sheer and bending moment diagrams

AI Thread Summary
For concentrated loads, the shear diagram remains constant, resulting in horizontal lines, while the bending moment diagram is linear. In contrast, evenly distributed loads produce a linear shear diagram and a quadratic bending moment diagram. The discussion suggests that with linearly distributed loads, the shear diagram would be quadratic and the bending moment diagram cubic. Participants express difficulty in visualizing these concepts and seek equations to clarify their understanding. The conversation emphasizes the complexity of analyzing shear and bending moment diagrams under varying load conditions.
fayan77
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ok so for concentrated loads the sheer diagram is constant meaning are straight horizontal lines and the bending moment diagram is linear. when there are evenly distributed loads sheer diagram is linear and bending moment diagram is quadratic. I am thinking that when there is a load distributed linearly like in the picture below the sheer diagram would be quadratic and the bending moment diagram cubic. I am kind of stuck on this problem all the variables make it harder to visualize what is happening I have done this so far but i got stuck when trying to find the bending moment.
 

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fayan77 said:
the sheer diagram is constant meaning are straight horizontal lines
I cannot make sense of that.
fayan77 said:
when there is a load distributed linearly like in the picture below the sheer diagram would be quadratic and the bending moment diagram cubic.
Seems reasonable. Can you write the equations?
 
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