4.2 Using ACI requirements, a. Find the minimum required number of #8 bars for an ultimate...
4.2 Using ACI requirements,
a. Find the minimum required number of #8 bars for an ultimate applied moment Mu = 300 kip-ft, a beam width b = 15", effective depth d = 26". Use ?? ′ = 5,000 ???, and, ?? = 50,000 ???.
b. Find the minimum effective depth d for an ultimate applied moment Mu = 600 kip-ft, a beam width b = 18", and a reinforcement ratio ρ = 0.5ρmax. Use ?? ′ = 4,000 ???, and, ?? = 60,000 ???.
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4.2 Using ACI requirements,
a. Find the minimum required number of #8 bars for an ultimate...
What is the ultimate moment capacity (Mu) of a reinforced concrete beam with b = 20",...
What is the ultimate moment capacity (Mu) of a reinforced concrete beam with b = 20", d = 46", 4-#8 bottom bars, f'c = 4000 psi, fy = 60,000 Psi? Assume depth of stress block a = 9.2" 588.7 ft-kip 603.1 ft-kip 670.1 ft-kip 704.8 ft-kip
2. A beam with the following cross section has to be designed to resist factored positive...
2. A beam with the following cross section has to be designed to resist factored positive moment demand, Mu, equal to 1500 kip-in. Due to architectural reasons, the dimensions of the section are pre-defined as below. Also, only #8 and #9 bars can be used as longitudinal reinforcement and #4 bars as transverse reinforcement. The specified cover is 2". The compressive strength of the concrete is 4000 psi and grade 60 is used for the steel bars. The cross section...
Problem 1. (40 pts) Here is a design for a beam as shown in Figs Check...
Problem 1. (40 pts) Here is a design for a beam as shown in Figs Check if this section can resist the following loading conditions in the beam according to ACI-318. Use fc -4000 psi and fy - 60,000 psi. Assume that the clear cover is 1.5" (typical) for all and the vertical spacing between #8 bars is 1 inch. Both End (L Center (L2) #8 bars #8 Stirrup #3@ 8" 8#8 bars 20 in Stirrup: 6# 8 bars Pu=15...
HELP! Problem 6 Development Length (30 pts.) The required reinforcement steel area "As" for the lightweight reinforced concrete beam of figure 3 is 2.88 si. The No. 8 top bars are uncoated. C...
HELP!
Problem 6 Development Length (30 pts.) The required reinforcement steel area "As" for the lightweight reinforced concrete beam of figure 3 is 2.88 si. The No. 8 top bars are uncoated. Compute the development length (d), İffy 60,000 psi and fc 3.500 psi. a) Use the simplified equation Table 8-1) b) Use the ACI Equation 25.4.2.3a (Equation 8-10) c) Use the ACI Equation 25.4.2.3a with Ktr 0 (Equation 8-10) 18 3" 3@4 123 3" 448 bars 3.14 in2 26...
pls show work 2. Find the effective moment of inertia for the following concrete sections (f....
pls show work
2. Find the effective moment of inertia for the following concrete sections (f. = 4000 psi) when cracked moment to applied moment ratio is (a) 0.9 (b) 0.7 and (c) 0.5. Note: values are not from an actual beam. Calculate the applied moment if the beam span is 8 ft and (a) the central point load is 8 kip and (b) a UDL of 1 kip/ft is applied. Calculate the deflection due to a point load of...
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The...
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The centroid of the tension rebars is located 4 inches from the tension surface of the beam. Use fy = 60 ksi f’c = 3 ksi, compressive failure strain of concrete = 0.003. (A) Find the required tension rebars As to carry Mu = 5,700 kips-in. Show that the steel ratio does not meet the ACI requirements. (B) What can you do to meet ACI...
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)...
Based on tributary load analysis, the dead and live loads, wd and wų, respectively, acting on...
Based on tributary load analysis, the dead and live loads, wd and wų, respectively, acting on a beam in a vertical load resisting system are shown below. The concrete is normalweight with compressive strength f=5000 psi. Note that the given dead load includes the self-weight of the beam and slab. Section wp=1.2 kip/ft, wu=1.5 kip/ft be-45 inch 5 inch 1 30 inch B A 10 inch In=10 ft 1. Design and detail the beam for positive flexure at section A....
Please answer the question. The beam should be 35 ft. long for both pictures. (disregard the...
Please answer the question. The beam should be 35 ft. long for
both pictures. (disregard the 25 ft. length. it should be 35 ft.)
thank you
Reinforced Concrete
6-18%20(1).pdf Due: 06 March 2018 The beam shown in the figure is subjected to a uniformly distributed dead load (without including self-weight) equal to 0.5 kip/ft, and a uniformly distributed live load of 1.3 kip/ft. You may initially estimate the beam weight to be about 0.3 kip/ft, but you must verify and...
A beam having b=12in, d=21.5in and h=24in is reinforced with three No.11 (No.36) bars. Material strengths...
A beam having b=12in, d=21.5in and h=24in is reinforced with three No.11 (No.36) bars. Material strengths are fy=60,000 psi and fc'=4,000 psi. It is used on a 28 ft simple span to carry a total service load of 2430 lb/ft. For this memeber the sustainted loads include self-weight of the beam plus additional superimposed dead load of 510 lb/ft, plus 400 lb/ft representing that part of the live load that acts more or less continuously, such as furniture, equipment, and...
What is the ultimate moment capacity (Mu) of a reinforced concrete beam with b = 20", d = 46", 4-#8 bottom bars, f'c = 4000 psi, fy = 60,000 Psi? Assume depth of stress block a = 9.2" 588.7 ft-kip 603.1 ft-kip 670.1 ft-kip 704.8 ft-kip
2. A beam with the following cross section has to be designed to resist factored positive moment demand, Mu, equal to 1500 kip-in. Due to architectural reasons, the dimensions of the section are pre-defined as below. Also, only #8 and #9 bars can be used as longitudinal reinforcement and #4 bars as transverse reinforcement. The specified cover is 2". The compressive strength of the concrete is 4000 psi and grade 60 is used for the steel bars. The cross section...
Problem 1. (40 pts) Here is a design for a beam as shown in Figs Check if this section can resist the following loading conditions in the beam according to ACI-318. Use fc -4000 psi and fy - 60,000 psi. Assume that the clear cover is 1.5" (typical) for all and the vertical spacing between #8 bars is 1 inch. Both End (L Center (L2) #8 bars #8 Stirrup #3@ 8" 8#8 bars 20 in Stirrup: 6# 8 bars Pu=15...
HELP!
Problem 6 Development Length (30 pts.) The required reinforcement steel area "As" for the lightweight reinforced concrete beam of figure 3 is 2.88 si. The No. 8 top bars are uncoated. Compute the development length (d), İffy 60,000 psi and fc 3.500 psi. a) Use the simplified equation Table 8-1) b) Use the ACI Equation 25.4.2.3a (Equation 8-10) c) Use the ACI Equation 25.4.2.3a with Ktr 0 (Equation 8-10) 18 3" 3@4 123 3" 448 bars 3.14 in2 26...
pls show work
2. Find the effective moment of inertia for the following concrete sections (f. = 4000 psi) when cracked moment to applied moment ratio is (a) 0.9 (b) 0.7 and (c) 0.5. Note: values are not from an actual beam. Calculate the applied moment if the beam span is 8 ft and (a) the central point load is 8 kip and (b) a UDL of 1 kip/ft is applied. Calculate the deflection due to a point load of...
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)...
Based on tributary load analysis, the dead and live loads, wd and wų, respectively, acting on a beam in a vertical load resisting system are shown below. The concrete is normalweight with compressive strength f=5000 psi. Note that the given dead load includes the self-weight of the beam and slab. Section wp=1.2 kip/ft, wu=1.5 kip/ft be-45 inch 5 inch 1 30 inch B A 10 inch In=10 ft 1. Design and detail the beam for positive flexure at section A....
Please answer the question. The beam should be 35 ft. long for
both pictures. (disregard the 25 ft. length. it should be 35 ft.)
thank you
Reinforced Concrete
6-18%20(1).pdf Due: 06 March 2018 The beam shown in the figure is subjected to a uniformly distributed dead load (without including self-weight) equal to 0.5 kip/ft, and a uniformly distributed live load of 1.3 kip/ft. You may initially estimate the beam weight to be about 0.3 kip/ft, but you must verify and...
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