Question

Determine the normal force, shear force, and moment at point C.  

Answer 1

First find the vertical reactions at supports A and B

Consider equations of static equilibrium H=0;V=0; M=0

Now use at B to find the vertical reactions at support at A

Now use

Shear force at just left of support of A: (Sum of all forces either to the right side of section or to the left side of section)

Shear force at just right of support of A:

Shear force at C:

Overall SFD:

Bending Moment at A & B =

Bending Moment at C

Overall BMD:

Since the force acting on the beam is vertical and no horizontal , there horizontal reaction at support B= 0,

Therefore normal force at C= 0 kips