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A rectangular concrete beam measures 12 in. wide and has an effective depth of 18 in. Compression steel consisting of two No. 8 (No. 25) bars is located 2.5 in. from the compression face of the beam. If f. 60,000 psi, what is the design moment capacity of the beam, according to the ACI Code, for the following alternative tensile steel areas? (a) A, = three No. 10 (No. 32) bars in one layer, (b) A, = four No. 10 (No. 32) bars in two layers, (c) A, = six No. 9 (No. 29) bars in two layers. (Note: Check for yielding of com- pression steel in each case.) Plot M, versus p and comment on your findings. = 4000 psi and f, = %3D

A rectangular concrete beam measures 12 in. wide and has an effective depth of 18 in. Compression steel consisting of two No. 8 (No. 25) bars is located 2.5 in. from the compression face of the beam. If f. 60,000 psi, what is the design moment capacity of the beam, according to the ACI Code, for the following alternative tensile steel areas? (a) A, = three No. 10 (No. 32) bars in one layer, (b) A, = four No. 10 (No. 32) bars in two layers, (c) A, = six No. 9 (No. 29) bars in two layers. (Note: Check for yielding of com- pression steel in each case.) Plot M, versus p and comment on your findings. = 4000 psi and f, = %3D

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A rectangular concrete beam measures 12 in. wide and has an effective depth of 18 in. Compression steel consisting of two No. 8 (No. 25) bars is located 2.5 in. from the compression face of the beam. If f. 60,000 psi, what is the design moment capacity of the beam, according to the ACI Code, for the following alternative tensile steel areas? (a) A, = three No. 10 (No. 32) bars in one layer, (b) A, = four No. 10 (No. 32) bars in two layers, (c) A, = six No. 9 (No. 29) bars in two layers. (Note: Check for yielding of com- pression steel in each case.) Plot M, versus p and comment on your findings. = 4000 psi and f, = %3D
Transcribed Image Text:A rectangular concrete beam measures 12 in. wide and has an effective depth of 18 in. Compression steel consisting of two No. 8 (No. 25) bars is located 2.5 in. from the compression face of the beam. If f. 60,000 psi, what is the design moment capacity of the beam, according to the ACI Code, for the following alternative tensile steel areas? (a) A, = three No. 10 (No. 32) bars in one layer, (b) A, = four No. 10 (No. 32) bars in two layers, (c) A, = six No. 9 (No. 29) bars in two layers. (Note: Check for yielding of com- pression steel in each case.) Plot M, versus p and comment on your findings. = 4000 psi and f, = %3D
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