EASIEST METHOD TO FIND SFD BMD FOR SIMPLY SUPPORTED BEAM WITH CENTRAL POINT LOAD
EASIEST METHOD TO
FIND SFD BMD FOR SIMPLY SUPPORTED BEAM WITH CENTRAL POINT LOAD
At the ends of a simply supported beam the bending moments are zero.At the wall of a cantilever beam, the bending moment equals the moment reaction. At the free end, the bending moment is zero.
Beams – SFD and BMD
• Draw the SFD and BMD.
• Cut beam at C and
consider member AC, V = + P 2
M =
+
Px 2
• Cut beam at E and
consider member EB, V = -P 2 M
=
+
P(L
-
x)
2
• for a beam subjected to concentrated loads,
shear is constant between loading points and moment varies linearly
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