Question: A wide-flange beam ABC rests on three identical spring supports A, B and C (see figure). The flexural rigidity of the beam is EI =

A wide-flange beam ABC rests on three identical spring supports A, B and C (see figure). The flexural rigidity of the beam is EI = 6912 x 106 1b-in.2 and each spring has stiffness k = 62,500 1b/in. The length of the beam is L = 16 ft.

If the load P is 6000 1b, what are the reactions RA, RB, and RC? Also, draw the shear-force and bending-moment diagrams for the beam, labeling all critical ordinates.

Rc 2 4 4

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