Shearing/Bending diagrams, forces acting on beam

[togo]

Homework Statement

- Compute the reactions at the supports
- Draw complete shearing force and bending moment diagrams
- Determine magnitude and location of maximum absolute value of shearing force and bending moment
- Use free body diagram approach to determine internal shearing force and bending moment at any specified point in a beam
- Write equations for all segments of shearing force and bending moment diagrams

Homework Equations

M = FD

The Attempt at a Solution

I didn't attempt to finish it since I sort of got stuck. I was looking for examples in the book for how to do this and can't seem to find. Am I even close to correct on either the shearing or bending diagram? thanks

 

[OldEngr63]

Your loading diagram shows two point loads, yet your shear diagram shows three discontinuities. Why?

Think this one through, and when you do, you should be on the way to a solution.

 

[togo]

alright, so when you have a beam tacked onto a wall as in this example, is it treated the same way as though it was just sitting on a pivot on that end? thanks

 

[togo]

an improvement I hope, still don't know how to approach the bending diagram of moments.

 

[OldEngr63]

Your shear diagram shows a pair of steps, so there should be two different slopes evident on your bending moment diagram. I can't really tell if you tried to show that or not, but it is not very clear on your diagram. The left most slope should be quite a bit higher (magnitude) than the one of the right.

The built-in end does support a moment, unlike the pined end, and that is why the moment diagram does not go to zero on the left end. It comes out at the wall moment value.