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4.10. Determine the nominal moment capacity of the section in Fig. 4.1b using the reinforcement areas from Problem 4.2. f, = 60,000 psi.

4.10. Determine the nominal moment capacity of the section in Fig. 4.1b using the reinforcement areas from Problem 4.2. f, = 60,000 psi.

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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4.1. Compare the cracking moment based on the gross section properties and the transformed section properties with four No. 11 (No. 36) bars in Figure P4.1a based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with two No. 10 (No. 32) bars in Figure P4.1b based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with four No. 9 (No. 29) bars in Figure P4.1c based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with two No. 11 (No. 36) bars in Figure P4.1d based on a concrete tensile capacity of 7.5 Vf. 4.5. 4.2. 4.3. 4.4. Determine the cracking moment based on the gross section properties in Figure P4.1d if the section is prestressed such that there is a 300 psi compression stress in the extreme tension zone and the concrete tensile capacity is 7.5 Vf.. 4.6. Determine the service level moment capacity of the section in Figure P4.1a if the allowable stress for concrete is 0.45 f and the allowable stress for the rein- forcement is 30,000 psi. Use the areas of reinforcement from Problem 4.1. -28" 36" -12"-| 36" 2-½" 24" typ 36" 36" 2-2" typ 8" (a) f = 4000 psi (b) = 5000 psi (c) = 6000 psi (d) = 3000 psi FIGURE P4.1 FLEXURAL ANALYSIS AND DESIGN OF BEAMS 127 Determine the service level moment capacity of the section in Figure P4.1b if the allowable stress for concrete is 0.45 f' and the allowable stress for the reinforcement is 30,000 psi. Use the areas of reinforcement from Problem 4.2. 4.7. 4.8. Determine the service level moment capacity of the section in Figure P4.1c if the allowable stress for concrete is 0.45 f, and the allowable stress for the reinforcement is 30,000 psi. Use the areas of reinforcement from Problem 4.3. Determine the nominal moment capacity of the section in Fig. 4.1a using the reinforcement areas from Problem 4.1. f, 4.9. = 60,000 psi. 4.10. Determine the nominal moment capacity of the section in Fig. 4.1b using the reinforcement areas from Problem 4.2. f, = 60,000 psi.
Transcribed Image Text:4.1. Compare the cracking moment based on the gross section properties and the transformed section properties with four No. 11 (No. 36) bars in Figure P4.1a based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with two No. 10 (No. 32) bars in Figure P4.1b based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with four No. 9 (No. 29) bars in Figure P4.1c based on a concrete tensile capacity of 7.5 Vf. Compare the cracking moment based on the gross section properties and the transformed section properties with two No. 11 (No. 36) bars in Figure P4.1d based on a concrete tensile capacity of 7.5 Vf. 4.5. 4.2. 4.3. 4.4. Determine the cracking moment based on the gross section properties in Figure P4.1d if the section is prestressed such that there is a 300 psi compression stress in the extreme tension zone and the concrete tensile capacity is 7.5 Vf.. 4.6. Determine the service level moment capacity of the section in Figure P4.1a if the allowable stress for concrete is 0.45 f and the allowable stress for the rein- forcement is 30,000 psi. Use the areas of reinforcement from Problem 4.1. -28" 36" -12"-| 36" 2-½" 24" typ 36" 36" 2-2" typ 8" (a) f = 4000 psi (b) = 5000 psi (c) = 6000 psi (d) = 3000 psi FIGURE P4.1 FLEXURAL ANALYSIS AND DESIGN OF BEAMS 127 Determine the service level moment capacity of the section in Figure P4.1b if the allowable stress for concrete is 0.45 f' and the allowable stress for the reinforcement is 30,000 psi. Use the areas of reinforcement from Problem 4.2. 4.7. 4.8. Determine the service level moment capacity of the section in Figure P4.1c if the allowable stress for concrete is 0.45 f, and the allowable stress for the reinforcement is 30,000 psi. Use the areas of reinforcement from Problem 4.3. Determine the nominal moment capacity of the section in Fig. 4.1a using the reinforcement areas from Problem 4.1. f, 4.9. = 60,000 psi. 4.10. Determine the nominal moment capacity of the section in Fig. 4.1b using the reinforcement areas from Problem 4.2. f, = 60,000 psi.
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