CIVIL TUTOR

1.1 Shear force and Bending moment: When a beam is subjected to a set of loads and reactions, as a result of which the internal forces and moments tend to setup within the beam This internal force is the shear force  and the internal moments are the bending moments.  For illustration,  consider a beam with a given set of loading supported at two points A &  B giving rise to reactions at the two supports.                        (fig.  1.1) Let's cut the beam into two parts &  let's assume that the resultant of loads (F) and reactions to the left of section xx is vertically upwards.                         (fig.  1.2) For equilibrium of the section, the resultant of loads and reactions to the right of section xx has to be equal to ''F" but vertically downwards. This force is known as shear force...