Question: A rigid beam AB rests on the two short columns as shown in the figure below. A C is made of steel and has a

A rigid beam AB rests on the two short columns as shown in the figure below. AC is made of steel and has a diameter of 20 mm , and BD is made of aluminum and has a diameter of 40 mm . Determine the displacement of point F on AB if a vertical load of 90 kN is applied over this point. Take Est=200,000MPa,Eal=70,000MPa.
Structure I
A rigid beam AB rests on the two short columns as

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