what is binding moment ? what is its aplication ? intruduce me to its diagram also?

Bending moment:

Bending Moment is the torque that keeps a beam together (anywhere along the beam).
It is found by cutting the beam, then calculating the MOMENT needed to hold the left (or right) half of the beam stationary.
If this is done for the other (left) side you should get the same answer - but opposite direction.

 

 

Bending Moment and Shear diagrams are always used by structural engineers or anyone dealing with forces in materials. In steel beam design, bending moment tells the structural engineer what is the lightest shape I can use to carry this bending moment. Shear strength of steel beams are high and typically can be overlooked if there isnt and special loading condition that warrents a look such as a column sitting at the middle of a beam or near the support. At the support, the shear stresses are at its highest and any load near this point would raise a red flag to check the capacity of the steel beam. In concrete, everything has to be checked because concrete is design for bending and the internal couple within the beam must resist the external bending moment placed on it. In addition, the shear in concrete has to be check to make sure it has the capacity and if it doesnt, stirrups are used to raise the shear capacity to at or above the ultimate strength design of the section. In any case, steel stirrups are always placed in concrete beams. Also, if a engineer is doing a moment frame in concrete or steel, they have to understand how bending moments and shear should look like in the frame. In todays world, the structural engineer uses software to do all the calculation but if they do not know what a bending moment or shear diagram looks like in a loading condition, the analysis is null. Bending moment and shear diagrams are used all the time by engineers design bridges, buildings, boats, cars, planes and any type of structure that has to resist forces.