Problem 1. The column cross section shown in Fig. 1 is cast with f: =4,000 psi and reinforced with steel off, = 60,000 p

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Problem 1 The Column Cross Section Shown In Fig 1 Is Cast With F 4 000 Psi And Reinforced With Steel Off 60 000 P 1 (65.93 KiB) Viewed 13 times

Problem 1 The Column Cross Section Shown In Fig 1 Is Cast With F 4 000 Psi And Reinforced With Steel Off 60 000 P 2 (31.97 KiB) Viewed 13 times

Problem 1. The column cross section shown in Fig. 1 is cast with f: =4,000 psi and reinforced with steel off, = 60,000 psi. The total amount of reinforcement, Au = 11.32 in', comprised of 2 No. 11 + 2 No. 10 at each end of the section. The reinforcement ratio, A./A, = 0.03 or =0.03. h = 20 yn = 15" A = 4 No. 11+ 4 No. 10 b = 18" оос No. 4 tie Bending axis E-6-50-0.75 40 7h 0.1 - 60 3.5 0.08 -0.75 -02 -0.00 30 0.03 olh03 25 -0.02 e-04 Pg-0.01 20 05 0.7 15 0.51 10 Como Cont Limit Tons. Cont Limit 0.5 0 0.2 0.4 0.6 12 14 16 0.6 M Fig. A Nondimensional interaction diagram for recaptarted colome with horsies of 000 indy-0.75 . For clearer version of the Interaction diagram, refer to Fig. A-6b in Wight's Reinforced Concrete, Pg. 1095 Fig. 1 - Problem 1.
(f) (10 points) If the column acts like a beam (.e., pure bending condition), determine the maximum required axial force (P.) and moment (M.) that it can be carried. (E) (10 points) Explain/define/describe the "balanced" condition in the context of reinforced concrete. Determine the maximum required axial force (P.) and moment (M) that can be carried by the column under the "balanced" condition. (h) (10 points) Re-do or re-calculate P, and M for part (e) for the column, however, instead of being reinforced with 4 No. 11 + 4 No. 10, the column is being reinforced with a total amount of 6 No. 11+6 No.5 rebars (or 3 No. 11 + 3 No. 5, each end),