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Determine for the doubly reinforced cross section. Assume Grade 60 steel with f, 3,500 psi. Be...
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is...
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is 20 N/mm2 and the steel grade, fyk is 500 N/mm2. Evaluate whether the beam has been designed as under reinforced section AND also determine if the section is able to resist an applied moment of 75 kN.m. [10 marks] 30 mm T 3H10 300 mm 5H12 30 mm 100 mm FIGURE Q2
Problem 2 Determine the nominal moment capacity for the reinforced concrete beam shown. The beam ...
Problem 2 Determine the nominal moment capacity for the reinforced concrete beam shown. The beam cross section has a width 10 inch and a depth 20 inch. The beam is reinforced with a tension steel reinforcement of 3#8 with an area of steel # 2.37 inch Assume grade 60 steel with a yield strss, Fy 60 ksi d 20 3#8 2.37/ 2 As B-10"
Problem 2 Determine the nominal moment capacity for the reinforced concrete beam shown. The beam cross...
10. A beam cross-section is limited to the size shown below. Determine the required area of...
10. A beam cross-section is limited to the size shown below. Determine the required area of reinforcement for service load moments Mp-430 ft-kip and M 175 ft-ki ksi. Note that the beam self weight is already included in the dead load moment. Assume that c 0.6c for the singly-reinforced part of the section (for your initial guess). Hint: first calculate the nominal moment resisted by the concrete section without compression steel. Check the strength only p.f -4,000 psi and f,-60...
Reinforced concrete 2 For the section in Problem i) determine the area of steel such that...
Reinforced concrete
2 For the section in Problem i) determine the area of steel such that the depth of the equivalent rectangular concrete stress distribution (block) is 4", and ii) determine the nominal moment strength and capacity if the steel area is 25% higher than balanced steel condition. Assume d 23.5", f.-3,000 psi, and f 60,000 psi. Hole 5-88 8 16
Two beams are shown below. The first is singly reinforced with 3-#8, the second is doubly...
Two beams are shown below. The first is singly reinforced with
3-#8, the second is doubly reinforced by adding 2-#7 both top and
bottom. The concrete compressive strength, f’c = 3000 psi and the
steel is grade 60.
For the doubly reinforced beam, what is the location of the
neutral axis, c, measured from the top of the beam?
3.9 in.
5.6 in.
5.0 in.
4.4 in.
14 2 -2-t17 1G 2 2-17
Problem 2 Assume normal weight concrete with fe' = 3,500 psi and steel bars of Grade...
Problem 2 Assume normal weight concrete with fe' = 3,500 psi and steel bars of Grade 60 (fy = 60,000 psi). For design loads assume dead load Po = 300 kips (including member self-weight) and live load P. = 400 kips. Design a short round spiral column for axial load only, assuming initially po = 4%. Form sizes are available in 2 in increments.
Reinforced concrete Problem #1 (40 points): A beam with x-section shown in the figure is made...
Reinforced concrete
Problem #1 (40 points): A beam with x-section shown in the figure is made out of concrete with compressive strength fc = 4000 psi and the steel reinfrocemnt is of Grade 60 (fy 60000psi). Determine 1 The maximum compressive stress in the concrete f and the tensils stress in the steel , if the section is subjected to a bending moment of 130 ft-k (assume n 8) N.A._ 23" 23-х 4 #10 (5.06 in. 3" 18"
3. A rectangular simply supported beam has to carry a 9,500,000o Ib-in including self-weight. T 14 in. x 26 in. Given: 6-14 23.5 in, psi; and & -60,000 psi (a) Compute the maximum moment carr...
3. A rectangular simply supported beam has to carry a 9,500,000o Ib-in including self-weight. T 14 in. x 26 in. Given: 6-14 23.5 in, psi; and & -60,000 psi (a) Compute the maximum moment carrying capac nal dimensions cannot exceed .i d-d-23.5 in, d'-2.5 in, h-26 in.f'-5,000 of this member as a singly The e reinforced section to satisfy tension-contro lled failure ubly reinforced mem (b) Does the beam need to be designed as a doubly reinforcein forced part (c)...
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...
For the singly-reinforced section (Section A), compute the area of steel corresponding to balanced conditions, As(bal)....
For the singly-reinforced section (Section A), compute the area
of steel corresponding to balanced conditions, As(bal).
22" Use fe 4500 psi and f 60 ksi 30" 5-#10 3" SECTION A
FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is 20 N/mm2 and the steel grade, fyk is 500 N/mm2. Evaluate whether the beam has been designed as under reinforced section AND also determine if the section is able to resist an applied moment of 75 kN.m. [10 marks] 30 mm T 3H10 300 mm 5H12 30 mm 100 mm FIGURE Q2
Problem 2 Determine the nominal moment capacity for the reinforced concrete beam shown. The beam cross section has a width 10 inch and a depth 20 inch. The beam is reinforced with a tension steel reinforcement of 3#8 with an area of steel # 2.37 inch Assume grade 60 steel with a yield strss, Fy 60 ksi d 20 3#8 2.37/ 2 As B-10"
Problem 2 Determine the nominal moment capacity for the reinforced concrete beam shown. The beam cross...
10. A beam cross-section is limited to the size shown below. Determine the required area of reinforcement for service load moments Mp-430 ft-kip and M 175 ft-ki ksi. Note that the beam self weight is already included in the dead load moment. Assume that c 0.6c for the singly-reinforced part of the section (for your initial guess). Hint: first calculate the nominal moment resisted by the concrete section without compression steel. Check the strength only p.f -4,000 psi and f,-60...
Reinforced concrete
2 For the section in Problem i) determine the area of steel such that the depth of the equivalent rectangular concrete stress distribution (block) is 4", and ii) determine the nominal moment strength and capacity if the steel area is 25% higher than balanced steel condition. Assume d 23.5", f.-3,000 psi, and f 60,000 psi. Hole 5-88 8 16
Two beams are shown below. The first is singly reinforced with
3-#8, the second is doubly reinforced by adding 2-#7 both top and
bottom. The concrete compressive strength, f’c = 3000 psi and the
steel is grade 60.
For the doubly reinforced beam, what is the location of the
neutral axis, c, measured from the top of the beam?
3.9 in.
5.6 in.
5.0 in.
4.4 in.
14 2 -2-t17 1G 2 2-17
Problem 2 Assume normal weight concrete with fe' = 3,500 psi and steel bars of Grade 60 (fy = 60,000 psi). For design loads assume dead load Po = 300 kips (including member self-weight) and live load P. = 400 kips. Design a short round spiral column for axial load only, assuming initially po = 4%. Form sizes are available in 2 in increments.
Reinforced concrete
Problem #1 (40 points): A beam with x-section shown in the figure is made out of concrete with compressive strength fc = 4000 psi and the steel reinfrocemnt is of Grade 60 (fy 60000psi). Determine 1 The maximum compressive stress in the concrete f and the tensils stress in the steel , if the section is subjected to a bending moment of 130 ft-k (assume n 8) N.A._ 23" 23-х 4 #10 (5.06 in. 3" 18"
3. A rectangular simply supported beam has to carry a 9,500,000o Ib-in including self-weight. T 14 in. x 26 in. Given: 6-14 23.5 in, psi; and & -60,000 psi (a) Compute the maximum moment carrying capac nal dimensions cannot exceed .i d-d-23.5 in, d'-2.5 in, h-26 in.f'-5,000 of this member as a singly The e reinforced section to satisfy tension-contro lled failure ubly reinforced mem (b) Does the beam need to be designed as a doubly reinforcein forced part (c)...
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...
For the singly-reinforced section (Section A), compute the area
of steel corresponding to balanced conditions, As(bal).
22" Use fe 4500 psi and f 60 ksi 30" 5-#10 3" SECTION A
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