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The shear force diagram for a simply supported beam of a span L is shown in the figure. The maximum bending moment in the beam is:

The shear force diagram for a simply supported beam of a span L is shown in the figure. The maximum bending moment in the beam is: Correct Answer Wa

Resultant force at point D,

FD – W = 0

FD = W

At point C,

FD + FC = 0

FC = -W,

Similarly,

FA = W and FB = -W

Therefore, the beam with the loading and its bending moment diagram is shown in the figure below:

[ alt="13 2" src="//storage.googleapis.com/tb-img/production/19/03/13_2.PNG">

Hence, the maximum bending moment of the beam is (W × a).

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