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Unformatted text preview: Problem 2) The concrete column shown to the left is reinforced with several steel bars. The load applied to the column is 300 kips. Econcrete = 4,500 ksi, and Esteel = 29,000 ksi. There are 8 solid steel bars with diameters of 1.5 inches, and the column has an outside diameter of 10 inches. Determine the stress in the steel bars. Problem 3) Draw a shear and moment diagram for the beam shown to the right. The uniform load is 2 k/ft, the concentrated load is 20 kips. Problem 4) For the 20 foot long bar shown below, determine at what temperature the stress in the steel will reach 30 ksi. The bar was installed at a temperature of 70 degrees F, at which time the bar was exactly 0.1 inch shorter than the distance between the walls (i.e. there was a 0.1 gap between the end of the bar and the wall). The thermal coefficient of expansion of the bar is 6.5x10E6 in/in/degree F. E for the bar is 30xE10+6 psi and G is 10.5xE+6 psi....
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 Spring '08
 Gardoni

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