![]() If we start on the left, the reaction forces push up on the beam. ![]() One creates the shear diagram by analyzing the forces acting on the beam from one side to the other. The value of the force at each reaction is equates to the load at the center:įor the case of the concentrated load at the center, the shear stress ( V) has the same value as the reaction force ( R=V). The first case is concentrated load ( P), which acts on the beam at its center. If they were fixed, the shear and moment forces would react differently (explained later). This affects how the loads will react with supports in terms of shear and it’s bending moment. These supports or reactions ( R) are not fixed, hence they are free to move. The simple beam has two supports at each end. Simple Beam The simple beam above has two supports and a center load.
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