Bending Stresses (σb)
The stresses developed due to bending moment are
called as ‘Bending Stress’.
It is denoted by ‘σb’.
Where,
M = Moment developed due to eccentric loading at center
M = P.e;
I = Moment of inertia of column section;
It is denoted by ‘σb’.
Above fig. 2 shows a
column having cross section b (breadth) and d (width) is subjected to load ‘P’
at distance ‘e’ form Y- axis. Due to eccentric point load column is subjected
to direct and bending stress. But here we consider only bending stresses.
Now,
M =
Moment developed due to eccentric loading at center
M = P.e
We know that by
flexural formula,
Where,
M = Moment developed due to eccentric loading at center
M = P.e;
I = Moment of inertia of column section;
y = Max. centroidal
distance.;
Z = Section modulus =
I/y ;
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