Interior beams spaced typically at s, carrying a slab with a uniform pressure load of p, carries a uniformly distributed load w = ?
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Interior beams spaced typically at s, carrying a slab with a uniform pressure load of p, carries a uniformly distributed load w = ?
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- A simply supported beam is reinforced with 5-ϕ25 mm at the bottom and 2-ϕ20 mm at the top of the beam. Concrete covering to the centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. 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 a ductile failure: a. Depth of the neutral axis from the extreme concrete compression fiber to the nearest whole number (in mm) b. Design strength of the beam section to the nearest whole number (in kN·m) c. Maximum service uniform live load over the entire span in addition to a DL = 20 kN/m (including the weight of the beam) if it has a span of 6 m (in kN/m & to the nearest whole number)A reinforced concrete beam has a width of 300 mm and effective depth of 500mm to the centroid of the tension reinforcements. Consider the steel reinforcements will be placed in a single layer arrangement. Concrete strength fc’ = 34.5 MPa. Determine the steel ratio of the section if the beam is singly reinforced with the maximum amount of steel for transition control allowed by the Code if the bars has a steel strength of fy = 345 MPa. Determine the steel ratio of the section if the beam is singly reinforced with the maximum amount of steel for tension control if the bars has a steel strength fy = 345 MPa. Determine the number of pieces of 28 mm ᴓ bars required for the section if the beam is singly reinforced with the maximum amount of steel for tension control if the bars has a steel strength fy = 415 MPa.A floor slab 100 mm thick is cast monolithically with beams 250 mm wide 450 mm deep spaced 1.2 m on centers, on simple supports over a span of 5.0 m. The floor supports a service live load of 2.1 kPa. Using f'.= 21 MPa, rebar strength fy = 415 MPa, calculate the following if a typical interior beam is reinforced with 3- %3D 16-mm-dia. flexure bars at the bottom enclosed with 10-mm-dia. stirrups: 1. Nominal moment capacity (kN•m) of a typical interior beam in positive bending considering T-beam geometry. В. 86.99 A. 96.66 C. 91.10 D. 81.99 Maximum factored uniformly distributed load (kN/m) a typical interior beam can sustain against positive bending. 2. А. 30.93 В. 27.83 С. 26.23 D. 29.15 Maximum service superimposed dead load in kPa. В. 11.08 3. А. 17.73 С. 16.52 D. 14.77
- Consider an inner beam-column joint in the ground floor roof of a eight storey building in Noida, U.P. The data are as follows: M25, steel grade Grade of concrete Fe 415 D Clear span of beam to the left side of the joint 4.5 m Clear span of beam to the right side of the joint = 4 m 125 mm, 50 mm thick %3D Slab thickness finish on slab Live load on floor 2 kN/m; sta eo Wall thickness on beams 115 mm The axial load in column at the joint = 900 kN 230 mm x 550 mm with 1.5% steel at top (3 - 25 16 mm ) and 0.8% steel at bottom on Beam size %3D mm and 2 either side of the joint. Column size 230 m x 650 mm with 3.46% steel (8 – 25mm and 4 - 20 mm bars) Check if the joint satisfies weak girder-strong column proportion. Also check the shear in beam and column. 28 dign4) A simply supported beam is reinforced with 4-ϕ28 mm at the bottom and 2-ϕ20 mm at the top of the beam. Concrete covering to centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. The beam has a gross depth of 450 mm and gross width of 300 mm. fc’= 28 MPa, fy = 415 MPa. Assume bars laid out in single layer. Calculate the following if the limiting tensile steel strain is 0.004 for a ductile failure: Depth of the neutral axis from the extreme concrete compression fiber to the nearest whole number = __________ mm Design strength of the beam section to the nearest whole number = ___________ kN·m Maximum service uniform live load over the entire span in addition to a DL = 20 kN/m (including the weight of the beam) if it has a span of 6 m = __________ kN/m (to the nearest whole number)Design the simply supported beam shown in the Figure 1 for flexure Consider the following data. Characteristic compressive strength of concrete, fck= 25 N/mm? %3D Characteristic tensile strength of steel, fyk = 500 N/mm? Effective cover to reinforcement is 30 mm Density of Block work = 20 kN/m3 Draw the cross section of the beam at the mid span Height of 200 mm thick wall above the beam is 4 m 200 mm - Imposed Load-20kN/m 600 mm - 6 m
- A rectangular beam with a width of (9536/1150)-in,and effective depth of (9536/900)in is Reinforced with a single high strength steel bar that has a cross- sectional area of 0.42 in2.The bar has a normal tensile strength of 145 ksi, linear stress-strain curve to failure, and a strain at failure of 1.8 percent. The concrete strength fc= 6000 psi. Calculate the nominal flexural strength of the section.4.2 A simply supported beam is reinforced with 5-ϕ25 mm at the bottom and 2-ϕ20 mm at the top of the beam. Concrete covering to centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. The beam has a gross depth of 450 mm and gross width of 300 mm. fc’= 28 MPa, fy = 415 MPa. Assume bars laid out in single layer. Calculate the following if the limiting tensile steel strain is 0.004 for a ductile failure: Calculate: Design strength of the beam section to the nearest whole number = ____?___ kN·mDesign the slab reinforcement if the maximum positive moment is Mup=wul2/11 . and the maximum negative moment is Mup=wul2/19. Include the design for S&T bar. Given: length = 6m span = 2m Wu= 8.572 kPa Slab thickness = 150 mm f'c = 28 MPa fy= 219 MPa main bar = 10 mm s&t bar = 8mm
- 4.1 A simply supported beam is reinforced with 5-ϕ25 mm at the bottom and 2-ϕ20 mm at the top of the beam. Concrete covering to centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. The beam has a gross depth of 450 mm and gross width of 300 mm. fc’= 28 MPa, fy = 415 MPa. Assume bars laid out in single layer. Calculate the following if the limiting tensile steel strain is 0.004 for a ductile failure: Calculate: Depth of the neutral axis from the extreme concrete compression fiber to the nearest whole number = ____?___ mmThe concrete post shown is reinforced axially with four symmetrically placed steel bars each of cross-sectional are 900mm^2. If the 1000 kN axial load is applied and the moduli of elasticity are 200 GPa for steel and 14 GPa for concrete. Determine a) the stress in each of the steel bars, and b) the stress in the concrete.6. ESTIMATION OF QUANTITIES OF STEEL & R.C.C. ELEMENTS EPU Example 1: Estimate the Slab reinforcement for the given figure below. All the straight bottom bars are 10mm@400mm c/c. All offset bars 12mm@400mm c/c, All Additional Top bars 12mm@400mm c/c. The slab thickness is 150mm. Assume cover is 25mm & wall thickness20cm 0.45 0.45 3.70 4.70 0.45 0.45 3.70 5.20 3.10 1.60 150
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