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Problem 3 Three steel rods (with E-200 GPa, Cla = 1 1.7x10-6/oC) support a 45 kN load P. Each of the rods AB and CD has a 200 mm cross-sectional area, and rod EF has a 575 mm2 cross sectional area. The horizontal bar BED may be treated as rigid. The distance BE along the horizontal bar from pin B to pin E is 450 mm, and the distance ED along the horizontal bar from pin E to pin D is also 450 mm. Load P is applied at a point 200 mm to the right of pin B. In addition, rods AB and CD (but not EF) are subjected to a temperature increase of ΔΤ-400C. Determine the resulting axial force in rod AB. Final Answer: 8.52 kN) 500 mm 400 mm

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