Notice that simply fixing the ends of a beam reduces |
 |
the bending moment by a factor of two to three. The |
graph to the right shows that Mmax is the greatest in |
the middle of a uniformly loaded, simply supported |
beam since this is the farthest point from the supports. |
From there it gradually reduces to zero at the ends, |
which can rotate slightly and thus do not experience a |
bending moment. Of course a beam can be loaded
|
Fig. 144 - Bending moment |
non-uniformly which will affect the bending moment. |
diagram of a uniformly loaded, |
Only beams loaded in the middle or uniformly are |
simply supported beam |
treated in this lesson since they are the
simplest cases. |
|