Q. Write down the basic formula for maximum bending moment in some ideal cases.
Sol.:
Berm together with nature of load
Maximum B.M.
Section when maximum B.M. occurs
1.
Cantilever loaded with 1 point load wat the free end.
WL
It occurs at fixed end.
2.
Cantilever loaded with U.D.L. over entire length.
WL^{2}
2
here
W = total value of U.D.L.
20 × l
w/unit length
3.
Boam loaded with 1 point load at the mid-span.
4
where
W = point load placed at mid-span.
If occurs at mid-span.
4.
8
= 20 × l.
l