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FIGURE Q2 shows cross-section of a rectangular doubly reinforced concrete beam. The concrete grade, fck is...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
Reinforced concrete. Needed answer SECTION A : ANSWER ALL QUESTIONS A1. Explain the term “moment redistribution”....
Reinforced concrete. Needed answer
SECTION A : ANSWER ALL QUESTIONS A1. Explain the term “moment redistribution”. Then, discuss the implications in the design of reinforced concrete structures. (8 marks) A2. Prove (with the aid of diagram) that the depth of the neutral axis of a balanced reinforced concrete section is equal to 0.617d for steel strength, fyk = 500 N/mm² and concrete strength, fck = 30 N/mm². (10 marks)
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load...
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load as shown in Figure 3. The following data are given: The ultimate load, wu is 60 kN/m; characteristic strength of concrete, fck is 30 N/mm²; characteristic strength of reinforcement, fyk is 500 N/mm2. The effective depth, d is 650 mm. Take the link diameter, w as 10 mm, main bar diameter, o as 20 mm and concrete cover as 30 mm. Design the shear...
1. A cross section of a RC beam is described in a below figure. Three No....
1. A cross section of a RC beam is described in a below figure. Three No. 29 reinforcing bars are located at the bottom of the section. The area of a #29 reinforcing bar is 645 mm2 while the yield strength of the steel bar is 420 MPa. The tensile strength of concrete is 2.7 MPa, and the compressive strength of concrete is 21 MPa. In addition, n= E/Eis selected as 8. (1) Compute the maximum compressive and tensile stresses...
I designed and detailed the beam in problem 3 as you see. Redesign the reinforced concrete...
I designed and detailed the beam in problem 3 as you see.
Redesign the reinforced concrete beam of problem 3, If the value of
factored bending moment increased to 1,600 k.ft where the section
needs to be designed as a doubly reinforced beam.
3) Design and detail the reinforced concrete beam shown below if it is subjected to a factored bending moment of 1,100 k.ft f'=4,800psi fx=60 ksi. Include skin steel. 36" 15" 2#6 36 24 kino f's = 4800...
all parts A simply supported concrete beam is to be designed to span 8m. The beam...
all parts
A simply supported concrete beam is to be designed to span 8m. The beam is required to resist a dead load of 40 kN/m (which includes an allowance for self-weight) and an imposed load of 20 kN/m Calculate the ultimate design load that the beam will be required to resist and hence calculate the ultimate design moment. (10 Marks] b) Choose an appropriate depth and width of the beam. [5 marks] c) Calculate an appropriate amount of reinforcing...
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment...
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment of 200 kip ft. Knowing that the modulus of elasticity for the concrete and the steel are respectively Ec= 3.75 X 10 psi and Es = 30 x 10 psi, determine the tensile stress in [ksh] that develops in the steel bars. 20 in 1 in diameter 72.5 in 12 in-
Figure 3 shows the cross-section of a reinforced concrete beam which incorporates a services duct on...
Figure 3 shows the cross-section of a reinforced concrete beam which incorporates a services duct on the compression side. The concrete has the following properties: f'c =32 MPa, y = 0.82, and Ec = 28,500 MPa. Calculate the ultimate moment, Mu, for this section from first principles. Please note that the reinforcement yield stress for this question is 460 MPa and Ast = 4800mm. You may use the usual equivalent rectangular stress block and the limiting strain criterion (EU =...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead l...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead load (DL) gf 100 KN/m (excluding its own weight) and upiform live load LL) of 40KN/m. The beam is reinforced with 025 longitudinal rebars with 40mm cleat cover to the stirrups. Material properties: fy 420 MPa, fe 25 MPa. Beam dimension b 400mm and h 600mm....
A typical cross-section of a reinforced concrete beam is shown in Figure 1. The unit weight...
A typical cross-section of a reinforced concrete beam is shown in Figure 1. The unit weight the beam concrete along with the embedded reinforcement is estimated to be 150 lbs/ft3. 72 6 6 24" 8 48 12 18 Figure 1. Typical Beam Section All Dimensions are in Inches The beam has uniform cross-section throughout its entire length and simply supported over a span (L) of 30 ft. Calculate the following due to self-weight only: (a) Self weight of the beam...
2.4 A rectangular reinforced concrete beam 300 x 550 mm (b x d) is provided with 4H20 bars as compression steel. Determine the area of tension steel needed for the beam to attain its full moment capacity. Calculate the corresponding ultimate moment of resistance. Assume fck = 30 N/mm2 and fyk = 500 N/mm2.
Reinforced concrete. Needed answer
SECTION A : ANSWER ALL QUESTIONS A1. Explain the term “moment redistribution”. Then, discuss the implications in the design of reinforced concrete structures. (8 marks) A2. Prove (with the aid of diagram) that the depth of the neutral axis of a balanced reinforced concrete section is equal to 0.617d for steel strength, fyk = 500 N/mm² and concrete strength, fck = 30 N/mm². (10 marks)
A simply supported reinforced concrete beam of 8 m span is subjected to uniformly distributed load as shown in Figure 3. The following data are given: The ultimate load, wu is 60 kN/m; characteristic strength of concrete, fck is 30 N/mm²; characteristic strength of reinforcement, fyk is 500 N/mm2. The effective depth, d is 650 mm. Take the link diameter, w as 10 mm, main bar diameter, o as 20 mm and concrete cover as 30 mm. Design the shear...
1. A cross section of a RC beam is described in a below figure. Three No. 29 reinforcing bars are located at the bottom of the section. The area of a #29 reinforcing bar is 645 mm2 while the yield strength of the steel bar is 420 MPa. The tensile strength of concrete is 2.7 MPa, and the compressive strength of concrete is 21 MPa. In addition, n= E/Eis selected as 8. (1) Compute the maximum compressive and tensile stresses...
I designed and detailed the beam in problem 3 as you see.
Redesign the reinforced concrete beam of problem 3, If the value of
factored bending moment increased to 1,600 k.ft where the section
needs to be designed as a doubly reinforced beam.
3) Design and detail the reinforced concrete beam shown below if it is subjected to a factored bending moment of 1,100 k.ft f'=4,800psi fx=60 ksi. Include skin steel. 36" 15" 2#6 36 24 kino f's = 4800...
all parts
A simply supported concrete beam is to be designed to span 8m. The beam is required to resist a dead load of 40 kN/m (which includes an allowance for self-weight) and an imposed load of 20 kN/m Calculate the ultimate design load that the beam will be required to resist and hence calculate the ultimate design moment. (10 Marks] b) Choose an appropriate depth and width of the beam. [5 marks] c) Calculate an appropriate amount of reinforcing...
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment of 200 kip ft. Knowing that the modulus of elasticity for the concrete and the steel are respectively Ec= 3.75 X 10 psi and Es = 30 x 10 psi, determine the tensile stress in [ksh] that develops in the steel bars. 20 in 1 in diameter 72.5 in 12 in-
Figure 3 shows the cross-section of a reinforced concrete beam which incorporates a services duct on the compression side. The concrete has the following properties: f'c =32 MPa, y = 0.82, and Ec = 28,500 MPa. Calculate the ultimate moment, Mu, for this section from first principles. Please note that the reinforcement yield stress for this question is 460 MPa and Ast = 4800mm. You may use the usual equivalent rectangular stress block and the limiting strain criterion (EU =...
simply supported reinforced concrete beam of rectangular section is hung on the left end by a 400mm square post working in tension, as shown in the figure below. The beam supports a uniform dead load (DL) gf 100 KN/m (excluding its own weight) and upiform live load LL) of 40KN/m. The beam is reinforced with 025 longitudinal rebars with 40mm cleat cover to the stirrups. Material properties: fy 420 MPa, fe 25 MPa. Beam dimension b 400mm and h 600mm....
A typical cross-section of a reinforced concrete beam is shown in Figure 1. The unit weight the beam concrete along with the embedded reinforcement is estimated to be 150 lbs/ft3. 72 6 6 24" 8 48 12 18 Figure 1. Typical Beam Section All Dimensions are in Inches The beam has uniform cross-section throughout its entire length and simply supported over a span (L) of 30 ft. Calculate the following due to self-weight only: (a) Self weight of the beam...
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