Strength of materials An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry ...
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Strength of materials An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry ...
13. An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry a compressive axial...
13. An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry a compressive axial force of 235,000 pounds. Assume the normal stress in concrete to be a uniform maximum of 3ksi and the normal stress in steel bars to be 20ksi, determine the minimum number of 0.25" diameter steel bars needed
13. An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry a compressive axial force of 235,000 pounds. Assume...
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...
The concrete post (Ec 3.6 x 10 psi and ac 5.5 x 10/F) is reinforced with...
The concrete post (Ec 3.6 x 10 psi and ac 5.5 x 10/F) is reinforced with six steel bars, each of-in. diameter (Es= 29 x 10 psi and as 6.5 x 10/F). Determine the normal stresses induced in the steel and in the concrete by a temperature rise of 60°F. 6 ft 10 in 10 in The normal stress in the steel is ksi. psi The normal stress in the concrete is
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...
Example CVEG 4303: Reinforced Concrete I One-Way Slabs A 5" thick concrete slab is reinforced for...
Example CVEG 4303: Reinforced Concrete I One-Way Slabs A 5" thick concrete slab is reinforced for tension with #4 bars spaced at 7". The effective depth is 4" Grade 60 bars and 8,ooo psi concrete will be used. 1.) Determine the design bending strength (фМп) of the slab. 2.) Check that ACI requirements for rebar strain, rebar spacing, and minimum reinforcement are met (ACI 7.3.3.1, ACI 24.3.2, and ACI 7.6.1.1 respectively). Note: Do not need to check temperature and shrinkage...
Qu estion 1: (25 points) The beam shown below has a span of 13 ft and is reinforced with bars tha...
Qu estion 1: (25 points) The beam shown below has a span of 13 ft and is reinforced with bars that ext end 8 inch beyond the face of the support. The centerline of the longitudinal bars nearest the side ace (i.e., the "outside bars") is 3.5 inch from, the side face as shown below. The concrete has a compressive strength of 3.0 ksi, and the reinforcement is Grade 60. The beam is loaded with a distributed live load (w)...
Design a square single column footing to support an 18 inch square interior column reinforced with...
Design a square single column footing to support an 18 inch square interior column reinforced with 8-#10 bars. The column carries an unfactored dead load of 245 Kips that includes weight of soil and weight of footing and an unfactored live load of 20 feet below finished grade. The footing is 10 feet by 10 feet and is 30 inches thick. The allowable soil pressure is 5000 psf, fe' 4000 psi and fy 60000 psi. Concrete used shall be sand...
For the same singly-reinforced (reinforcement in tension only) concrete section used in Homework 3, we want...
For the same singly-reinforced (reinforcement in tension only) concrete section used in Homework 3, we want to investigate the impact of using a parabolic semi-segment for the shape of the concrete stress-strain curve in the determination of the ultimate capacity of the beam. Note that steel stress-strain behavior will be modeled using elasto-plastic model. The properties of the materials are s"-4500 psi for the concrete and Jy -60 ksi for the reinforcement. Using this type of behavior leads to the...
Part A The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. The...
Part A The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. The column is subjected to an axial force of P 190 kip Each rod has a diameter of 1 in. For A992 steel Et 29.0(103) ksi, and for high-strength concrete Ee 4.20(10) ksi (Figure 1) Determine the average normal stress in the concrete and in each rod Express your answer to three significant figures and include appropriate units o,o.-1 Value Units | Submit Part B...
13. An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry a compressive axial force of 235,000 pounds. Assume the normal stress in concrete to be a uniform maximum of 3ksi and the normal stress in steel bars to be 20ksi, determine the minimum number of 0.25" diameter steel bars needed
13. An 8 inch by 8 inch reinforced concrete bar needs to be designed to carry a compressive axial force of 235,000 pounds. Assume...
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...
The concrete post (Ec 3.6 x 10 psi and ac 5.5 x 10/F) is reinforced with six steel bars, each of-in. diameter (Es= 29 x 10 psi and as 6.5 x 10/F). Determine the normal stresses induced in the steel and in the concrete by a temperature rise of 60°F. 6 ft 10 in 10 in The normal stress in the steel is ksi. psi The normal stress in the concrete is
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...
Example CVEG 4303: Reinforced Concrete I One-Way Slabs A 5" thick concrete slab is reinforced for tension with #4 bars spaced at 7". The effective depth is 4" Grade 60 bars and 8,ooo psi concrete will be used. 1.) Determine the design bending strength (фМп) of the slab. 2.) Check that ACI requirements for rebar strain, rebar spacing, and minimum reinforcement are met (ACI 7.3.3.1, ACI 24.3.2, and ACI 7.6.1.1 respectively). Note: Do not need to check temperature and shrinkage...
Qu estion 1: (25 points) The beam shown below has a span of 13 ft and is reinforced with bars that ext end 8 inch beyond the face of the support. The centerline of the longitudinal bars nearest the side ace (i.e., the "outside bars") is 3.5 inch from, the side face as shown below. The concrete has a compressive strength of 3.0 ksi, and the reinforcement is Grade 60. The beam is loaded with a distributed live load (w)...
Design a square single column footing to support an 18 inch square interior column reinforced with 8-#10 bars. The column carries an unfactored dead load of 245 Kips that includes weight of soil and weight of footing and an unfactored live load of 20 feet below finished grade. The footing is 10 feet by 10 feet and is 30 inches thick. The allowable soil pressure is 5000 psf, fe' 4000 psi and fy 60000 psi. Concrete used shall be sand...
For the same singly-reinforced (reinforcement in tension only) concrete section used in Homework 3, we want to investigate the impact of using a parabolic semi-segment for the shape of the concrete stress-strain curve in the determination of the ultimate capacity of the beam. Note that steel stress-strain behavior will be modeled using elasto-plastic model. The properties of the materials are s"-4500 psi for the concrete and Jy -60 ksi for the reinforcement. Using this type of behavior leads to the...
Part A The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. The column is subjected to an axial force of P 190 kip Each rod has a diameter of 1 in. For A992 steel Et 29.0(103) ksi, and for high-strength concrete Ee 4.20(10) ksi (Figure 1) Determine the average normal stress in the concrete and in each rod Express your answer to three significant figures and include appropriate units o,o.-1 Value Units | Submit Part B...
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