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5. For...
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength...
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength of fc 30 MPa, reinforced with 5-25 mm diameter steel bar at the effective depth of 500 mm. If is subjected to a moment, M 130 kN-m. Determine the following: Magnitude of the bending moment that cracks the singly-reinforced beam section. (10 pts) b. For the computed cracking moment, determine the maximum compressive stress in the concrete and the stress in the tension steel....
326 СНАРТER 6 BENDING EXAMPLE 6.18 The reinforced concrete beam has the cross-sectional area shown in Fig. 6-39a. If it...
326 СНАРТER 6 BENDING EXAMPLE 6.18 The reinforced concrete beam has the cross-sectional area shown in Fig. 6-39a. If it is subjected to a bending moment of M = 60 kip ft determine the normal stress in each of the steel reinforcing rods and the maximum normal stress in the concrete. Take Est = 29(10) ksi and Econc = 3.6(103) ksi SOLUTION Since the beam is made of concrete, in the following analysis we will neglect its strength in supporting...
Problem 2. A concrete beam is reinforced by three steel rebars placed as shown. The modulus...
Problem 2. A concrete beam is reinforced by three steel rebars placed as shown. The modulus of elasticity is 3x106 psi for concrete and 29x106 psi for steel. Find the tensile stress in rebars and maximum compressive stress in concrete under an external bending moment of (a) 80 kip.in and (b) 240 kip.in. Given the compressive strength of concrete fe' = 3 ksi and yield stress of rebars fy = 60 ksi, discuss the state of crack in concrete and...
Cracking Moment (Uncracked Concrete Stage) Problem 1) Problem 2.6 (page 55, McCormac and Brown, gth Ed.)...
Cracking Moment (Uncracked Concrete Stage) Problem 1) Problem 2.6 (page 55, McCormac and Brown, gth Ed.) Note: Modify the total depth of the beam from 24" to 26" and the depth of the steel rebars from 21" to 23". Transformed Area Method (Concrete Cracked- Elastic Stresses Stage) Problem 2) Problem 2.13 (page 56, McCormac and Brown, 8th Ed.) Note: Make the following changes: Change fe to 5 ksi use the values and dimensions shown in the figure below 1) 2)...
Answer the following questions for each cross-section below using the Equivalent Rectangular Stress Block (Whitney Stress...
Answer the following questions for each cross-section below using the Equivalent Rectangular Stress Block (Whitney Stress Block) for compressive stresses in the concrete. (72 total points) A. What is the nominal moment capacity of the beam (Ma)? [6 points) B. What is the distance from the top of the beam to the neutral axis (c)? [2 points] C. Assuming the concrete reaches a strain of 0.003, what is the strain in the extreme tension layer of reinforcing steel? Draw the...
5. For the beam and properties shown: Ec 4,030 ksi f=6ksi fy=60 ksi h-12" fr=530 psi...
5. For the beam and properties shown: Ec 4,030 ksi f=6ksi fy=60 ksi h-12" fr=530 psi E,-29,000 ksi 4-# 11 y = 150 pcf 2.5" b-18" Find: .Cracking moment based on gross section properties (10 pts) a b. Service moment corresponding to 0.45 fe, 0.4f, (10 pts) Nominal Flexural Strength (use Whitney Stress block) (10 pts) c. d. Does this beam satisfy ACI 9.6.1? (10 pts) e. If B 0.75, is the beam closest to a tension controlled or compression...
This is the answer please show work and steps. Question 2: A beam has a height...
This is the answer please show
work and steps.
Question 2: A beam has a height of 20 inch, width of 16 inch, a depth to the centroid of the steel of tension steel of 17 inch, and a depth to the centroid of the compression steel of 3 inch. The concrete has a compressive strength of 6 ksi, and the reinforcement is Grade 60. Determine the factored moment capacity (фМп), if the tension reinforcement is four #9 bars and...
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level...
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level moment M= 200 ft-k, use the procedures from Chapter 2 to find (20 pts) the following using linear-elastic analysis procedures and using transformed section a. properties: compressive stress in the concrete (fc) tension stress in the bottom steel (fs) compressive stress in the top steel (f's) What is the applicable moment of inertia of the concrete section if the (10 pts) service level moment...
Can you do #2 please 1. For the beam section presented here below, calculate the reduced...
Can you do #2 please
1. For the beam section presented here below, calculate the reduced nominal moment capacity O M and corresponding ultimate curvature 0u. The beam section is made of concrete with a compressive strength, fe 4,000 psi and reinforcement with a yield strength of fy 60 ksi. The beam has 4 No. 9 bars in tension side and the following number of bars are provided at the compression side of the beam section: 15" (a) A, (b)...
Problem 1 Reinforced Concrete T-Flanged Sections (50 pts.) You are required to analyze and design...
Problem 1 Reinforced Concrete T-Flanged Sections (50 pts.) You are required to analyze and design the propped cantilever t-section from HM 4 but for shear only. Draw shear V and moment M diagrams for uniformly distributed load throughout the 30ft span and equally concentrated loads at 10ft and 30ft. Recall that the connection at the left joint N1 is fixed. The connection at 20ft N3 is a roller. The right end node N2 is a free end. Use a concrete...
2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength of fc 30 MPa, reinforced with 5-25 mm diameter steel bar at the effective depth of 500 mm. If is subjected to a moment, M 130 kN-m. Determine the following: Magnitude of the bending moment that cracks the singly-reinforced beam section. (10 pts) b. For the computed cracking moment, determine the maximum compressive stress in the concrete and the stress in the tension steel....
326 СНАРТER 6 BENDING EXAMPLE 6.18 The reinforced concrete beam has the cross-sectional area shown in Fig. 6-39a. If it is subjected to a bending moment of M = 60 kip ft determine the normal stress in each of the steel reinforcing rods and the maximum normal stress in the concrete. Take Est = 29(10) ksi and Econc = 3.6(103) ksi SOLUTION Since the beam is made of concrete, in the following analysis we will neglect its strength in supporting...
Problem 2. A concrete beam is reinforced by three steel rebars placed as shown. The modulus of elasticity is 3x106 psi for concrete and 29x106 psi for steel. Find the tensile stress in rebars and maximum compressive stress in concrete under an external bending moment of (a) 80 kip.in and (b) 240 kip.in. Given the compressive strength of concrete fe' = 3 ksi and yield stress of rebars fy = 60 ksi, discuss the state of crack in concrete and...
Cracking Moment (Uncracked Concrete Stage) Problem 1) Problem 2.6 (page 55, McCormac and Brown, gth Ed.) Note: Modify the total depth of the beam from 24" to 26" and the depth of the steel rebars from 21" to 23". Transformed Area Method (Concrete Cracked- Elastic Stresses Stage) Problem 2) Problem 2.13 (page 56, McCormac and Brown, 8th Ed.) Note: Make the following changes: Change fe to 5 ksi use the values and dimensions shown in the figure below 1) 2)...
Answer the following questions for each cross-section below using the Equivalent Rectangular Stress Block (Whitney Stress Block) for compressive stresses in the concrete. (72 total points) A. What is the nominal moment capacity of the beam (Ma)? [6 points) B. What is the distance from the top of the beam to the neutral axis (c)? [2 points] C. Assuming the concrete reaches a strain of 0.003, what is the strain in the extreme tension layer of reinforcing steel? Draw the...
5. For the beam and properties shown: Ec 4,030 ksi f=6ksi fy=60 ksi h-12" fr=530 psi E,-29,000 ksi 4-# 11 y = 150 pcf 2.5" b-18" Find: .Cracking moment based on gross section properties (10 pts) a b. Service moment corresponding to 0.45 fe, 0.4f, (10 pts) Nominal Flexural Strength (use Whitney Stress block) (10 pts) c. d. Does this beam satisfy ACI 9.6.1? (10 pts) e. If B 0.75, is the beam closest to a tension controlled or compression...
This is the answer please show
work and steps.
Question 2: A beam has a height of 20 inch, width of 16 inch, a depth to the centroid of the steel of tension steel of 17 inch, and a depth to the centroid of the compression steel of 3 inch. The concrete has a compressive strength of 6 ksi, and the reinforcement is Grade 60. Determine the factored moment capacity (фМп), if the tension reinforcement is four #9 bars and...
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level moment M= 200 ft-k, use the procedures from Chapter 2 to find (20 pts) the following using linear-elastic analysis procedures and using transformed section a. properties: compressive stress in the concrete (fc) tension stress in the bottom steel (fs) compressive stress in the top steel (f's) What is the applicable moment of inertia of the concrete section if the (10 pts) service level moment...
Can you do #2 please
1. For the beam section presented here below, calculate the reduced nominal moment capacity O M and corresponding ultimate curvature 0u. The beam section is made of concrete with a compressive strength, fe 4,000 psi and reinforcement with a yield strength of fy 60 ksi. The beam has 4 No. 9 bars in tension side and the following number of bars are provided at the compression side of the beam section: 15" (a) A, (b)...
Problem 1 Reinforced Concrete T-Flanged Sections (50 pts.) You are required to analyze and design the propped cantilever t-section from HM 4 but for shear only. Draw shear V and moment M diagrams for uniformly distributed load throughout the 30ft span and equally concentrated loads at 10ft and 30ft. Recall that the connection at the left joint N1 is fixed. The connection at 20ft N3 is a roller. The right end node N2 is a free end. Use a concrete...
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