Determine the reactions and bar forces that are created in the truss in Figure P9.30 when the top chords (ABCD) are subjected to a 50°F temperature increase. Given: AE is constant for all bars, A = 10 in. 2 , E = 30,000 kips/in. 2 , and ? = 6.5 × 10 ?6 (in./in.)/°F.




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