Beam \(A B C\) is supported by a three-bar truss at point \(C\) and at \(A\) by an elastomeric pad that is equivalent to a roller.

(a) Compute the vertical deflection of point \(B\) in Figure P8.39 due to the applied load.

(b) Compute the change in length of member \(D E\) required to displace point \(B\) upward \(0.75 \mathrm{in}\). Is this a shortening or lengthening of the bar? Given: \(E=29,000 \mathrm{kips} / \mathrm{in}^{2}\), area of all truss bars \(=1 \mathrm{in} .^{2}\), area of beam \(=16 \mathrm{in} .{ }^{2}, I\) of beam \(=1200 \mathrm{in} .{ }^{4}\).

Transcribed Image Text:

10'- P = 64 kips B 10'- DM 6 6 E T 8"