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Workshop_6_SOLUTION_Nov_12_09

# Workshop_6_SOLUTION_Nov_12_09 - c'=4 ksi f y =f yt =60ksi b...

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Name: _ SOLUTION _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CE 441 Reinforced Concrete Design – Workshop 6 Thursday November 12, 2009 Due at the end of class a) Design a rectangular tied column with five reinforcement bars on each side as shown. The following service loads and moments are to be considered: P= 100 k DL + 80 k LL and M=50 k-ft DL + 90 k-ft LL. At the critical section for shear V= 10 k DL +30 k LL. The width of the column is set as b =14.0 in. Use the provided strength interaction diagrams from pages 1066 and 1067 of the text by Wight and MacGregor (copy included with this workshop) to obtain a design. Assume 3.0 inches from the center of longitudinal bars to surface of member as shown. Select the cross-section total depth h in full inch increments. Select the steel ratio to gross cross section ρ g in the range of 0.025 to 0.045 for your final design. Determine also the maximum tie spacing using #3 ties. f

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Unformatted text preview: c '=4 ksi, f y =f yt =60ksi. b) Design a circular spiral column having symmetrical reinforcement to carry the same service loads and moments P= 100 k DL + 80 k LL and M=50 k-ft DL + 90 k-ft LL. At the critical section for shear V= 10 k DL +30 k LL. Use the provided strength interaction diagrams from pages 1075 and 1076 of the text by Wight and MacGregor (copy included with this workshop) to obtain a design. Assume 3.0 inches from the center of longitudinal bars to surface of member as shown. Select cross-section diameter in full inch increments. Select the steel ratio to gross cross section ρ g in the range of 0.025 to 0.045 for your final design. Determine also the maximum spiral pitch (spacing of adjacent loops) for #3 spiral reinforcement. f c '=4 ksi, f y =f yt =60ksi. A Family of Design Interaction Diagrams from Wight and MacGregor: f c ’=4ksi, f y =60 ksi 11-12-2009...
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Workshop_6_SOLUTION_Nov_12_09 - c'=4 ksi f y =f yt =60ksi b...

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