problem 1 25 points in the configuration shown all members are at a un
Problem 1 (25 points)
In the configuration shown, all members are at a uniform
temperature and ABCD is vertical. Then the horizontal
bars are subjected to different temperature changes: AT1=
-50 K for EB and AT2=75 K for FC. The bars EB and FC
have the same length L = 1.5 m, thermal expansion
coefficient a = 12 x 10-6/K, cross-sectional area = 50 mm²
and Young's modulus E = 200 GPa. Assuming that the
vertical bar ABCD is rigid, find the displacement at point
D and the forces in bars EB and FC. The length of the
rigid bar ABCD is 3 m.
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