Problem # 1. A rectangular has a width of 300 mm and an effective depth of 460 mm. The beam is reinforced with 2-28 mm dia. at the top. fc'=35 MPa, fy = 350 MPa a. Compute the ratio of the depth of compression block to the distance of the top fiber to the neutral axis. b. Compute the balanced steel ratio of the reinforcement. c. Compute the max. area of the steel permitted.

Problem # 1. A rectangular has a width of 300 mm and an effective depth of 460 mm. The beam is reinforced with 2-28 mm dia. at the top. fc'=35 MPa, fy = 350 MPa a. Compute the ratio of the depth of compression block to the distance of the top fiber to the neutral axis. b. Compute the balanced steel ratio of the reinforcement. c. Compute the max. area of the steel permitted.

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter9: Composite Construction

Section: Chapter Questions

Problem 9.8.8P

See similar textbooks

Similar questions

The details of the cantilever beam are shown below. Use f’c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa. Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete is normal weight and reinforcements are galvanized. What is the flexural capacity of the beam at face of support in kNm? What is the shear capacity of the beam at face of support in kN? What is the maximum Pu (kN) that can be applied at the free end of the beam considering flexure and shear? What is the required minimum cut length (mm) of each stirrup? Round your answer to nearest safe25 mm
The details of the cantilever beam are shown below. Use f’c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa.Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete is normal weight and reinforcements are galvanized. 1.what is the flexural capacity of the beam at face of support in kNm ? 2. What is the shear capacity of the beam at face of support in kN?3. What is the maximum Pu (kN) that can be applied at the free end of the beam considering flexure and shear?
The details of the cantilever beam are shown below. Use f’c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa.Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete is normal weight and reinforcements are galvanized. 1. What is the shear capacity of the beam at face of support in kN?2. What is the maximum Pu (kN) that can be applied at the free end of the beam considering flexure and shear?3. What is the required minimum cut length (mm) of each stirrup? Round your answer to nearest safe25 mm
A simply supported beam is reinforced with 5-25mm at the bottom And 2-20mm at the top if the beam. Concrete covering to centroid of reinforcement is 70mm at the top and 64 mm at the bottom. The beam has a gross depth of 450 mm and gross width of 300 mm. Fc’=28 mpa fy= 415 mpa. Assume bars are laid out in a single layer. calculate the following if the limiting tensile steel strain is 0.004 for ductile failure: a) depth if neutral axis from the extreme concrete compression fiber ( in mm, in whole number) b) design strength of the beam section ( in kn•m , in whole number) c) maximum service uniform live load over the entire span in Addition to a DL = 20 kn/m ( including weight of the beam) if it has a span of 6 m ( in kn, in whole number)
1. The details of the cantilever beam are shown below. Use f’c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa. Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete is normal weight and reinforcements are galvanized. a. What is the required minimum cover of the beam and column in mm?b. What is the effective depth of the beam in mm?c. What is the required development length of the standard hook in tension in mm?d. What is the flexural capacity of the beam at face of support in kNm?e. What is the shear capacity of the beam at face of support in kN?f. What is the maximum Pu (kN) that can be applied at the free end of the beam considering flexure and shear?g. What is the required minimum cut length (mm) of each stirrup? Round your answer to nearest safe25 mm.
1. The details of the cantilever beam are shown below. Use f’c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa. Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete is normal weight and reinforcements are galvanized. d. What is the flexural capacity of the beam at face of support in kNm?e. What is the shear capacity of the beam at face of support in kN?f. What is the maximum Pu (kN) that can be applied at the free end of the beam considering flexure and shear?g. What is the required minimum cut length (mm) of each stirrup? Round your answer to nearest safe25 mm.
A reinforced concrete beam has a width of 300 mm and an effective depth of 618 mm. Compressive reinforcement will be placed at d' = 60 mm, f'c = 28 MPa and fy = 415 MPa. Use Ø = 0.9 for flexure and load combination of U= 1.2DL + 1.6LL. Reference: NSCP 2015. a. Calculate the steel ratio for a balanced section, phal- b. Calculate the maximum steel ratio for a tension-controlled section, pmax. d. c. If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the required design flexural strength of the section. If the beam is to support a bending moment of 240 kN-m from dead load and 195 kN-m from live load, determine the number of 28 mmø bars required as tension reinforcement.
The rectangular doubly reinforcement stress concrete block with the arrangement of reinforcement of 2N28 bars on top and 3N28 bars on bottom. The modulus of elasticity are Ec =23,500MPa and Es = 200,000MPa. Dead load is 18KN/m and live load is 12KN/m. f'c = 25MPa 800 730 N12 ligs (fx.t-500MPa) Ast = 3N28 350 Span = 10m Figure 3 Use the Transformed section approach considering the presence of steel. Calculate the concrete area and transformed steel area in both tension and compression shown in Figure 3. n=Es/Ec Ast=1232mm^2 Use n-1 for the transformed area to do the calculate. Unit: mm^2 with two decimal
The rectangular doubly reinforcement stress concrete block with the arrangement of reinforcement of 2N28 bars on top and 3N28 bars on bottom. The modulus of elasticity are Ec =23,500MPa and Es = 200,000MPa. Dead load is 18KN/m and live load is 12KN/m. f' = 25MPa 800 IDE 730 N12 ligs (fsv.f-500MPa) Ast = 3N28 350 Span = 10m Figure 3 Calculate the combination load for the reinforcement concrete beam shown in Figure 3. Unit: KN/m with two decimal. 1.2G+1.5Q=w
O Find the ultimate moment of resistance for the rectangular section reinforced as shown below. material strengths: Concrete Reinforcement Width of section Reinforcement fcu:= 30-MPa fy:= 450-MPa b:= 280-mm d:= 510-mm A, 2410-mm d':= 50-mm A's:= 628-mm² b A', d'
1. The details of the cantilever beam are shown below. Use f'c = 28 MPa, fy = 415 MPa, and fyt = 275 MPa. Notes:• All dimensions are in millimeters.• Column reinforcement not shown for clarity• Column and beam are neither exposed to weather nor contact with the ground.• Analyze as singly reinforce beam only.• Neglect the weight of the beam.• Concrete isnormal weight and reinforcements are galvanized. d. What is the flexural capacity of the beam at face of support in kNm? e. What is theshear capacity of the beam at face of support in kN? f. What is the maximum Pu (kN) that can be applied at the free end of the beam consideringflexure and shear? g. What is the requiredminimum cut length (mm) of each stirrup? Roundyour answer to nearest safe25 mm.
Determine the required tension steel area of the T beam with given properties below. Width of flange bf = 500 mm Width of web bw = 340 mm Thickness of flange tf = 140 mm Effective depth d = 350mm Effective concretee covering d' = 75mm Compressive strength of concrete fc' = 34.5 MPa Yield stress of steel bar fy = 375 MPa Mu = 415 kN-m As = _________ mm2