1. (a) Draw the influence lines for reactions R B , R D , and R F of the beam in Figure P12.5 and…

1. (a) Draw the influence lines for reactions RB, RD, and RF of the beam in Figure P12.5 and the shear and moment at E. (b) Assuming that the span can be loaded with a 1.2 kips/ft uniform load of variable length, determine the maximum positive and negative values of the reactions.

2. For the beam in Figure P12.6, draw the influence lines for reactions at B, C, E, and G, and moments at C and E. If a uniform load of 2 kips/ft is applied over the entire length of the beam, compute the reactions at B, C, D and E, moments at C and D.

 

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