Situation #2: Given is a rectangular beam having the following parameters; fc' = 35 MPa fy = 415 MPa As' = 975 mm? d = 550 mm d' = 63 mm As = 3265 mm? b = 400 mm Which of the following most nearly 2.1 : gives the depth of the compression * ?block إجابتك Which of the following most nearly 2.2 gives the compressive strength of * ?concrete

Situation #2: Given is a rectangular beam having the following parameters; fc' = 35 MPa fy = 415 MPa As' = 975 mm? d = 550 mm d' = 63 mm As = 3265 mm? b = 400 mm Which of the following most nearly 2.1 : gives the depth of the compression * ?block إجابتك Which of the following most nearly 2.2 gives the compressive strength of * ?concrete

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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ANALYSIS AND DESIGN OF DOUBLY REINFORCED CONCRETE BEAMS 2. Determine the number of bars needed to resist an ultimate moment equal to 550 KN.m. if the beam has a width of 400mm and a total depth equal to 550mm. F'c=21 MPa, Fy= 415 MPa. Use 32mm for tensile reinforcement and if compression reinforcement is needed, use 20mm for compression bars.
Material Strengths: of=41.4 MPa, fy = 414 MPa Determine the moment capacity (M) of the beam with the following details. There are two layers of reinforcement. Excerpt from the code: Where parallel reinforcement is placed in two or more layers, bars in the upper layers shall be placed directly above those in the bottom layer with clear distance between layers not less than 25 mm. b=300 mm h=500 mm Cc = 40 mm dtie =12 mm dagg = 24 mm As = 8-25 mm diameter
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1. The column section shown is reinforced with 10 bars having b-400mm, bar size-28mm, fc-35MPa, concrete cover = 50mm, tie diameter = 10mm, and fy = 420MPa. Considering bending along the strong axis for a balanced section, calculate a. the depth of compression block in the column in mm. b. the stress in the middle layer of steel reinforcement in MPa. c. the compressive force in the concrete in kN. d. the compressive force in the extreme compression reinforcement in kN. e. the ultimate axial load capacity of the column in kN. f. the eccentricity of the column in mm. g. the ultimate moment capacity of the column in kN.m h. the pure axial load capacity of the column. b=400mm 28mm 10 bars 600 mm
two span beam subjected to shear and flexure only is reinforced as follows: Section @ midspan @ face supports Top bars 2-20mm 5-20mm Bottom bars 3-20mm 2-20mm Given Stirrup diameter: 10 mm concrete fc = 21 mpa steel rebar fy = 415 mpa stirrup fy = 275 mpa beam size b x h = 270 mm x 450 mm assume all bars laid out in single layer calculate the following: a) tensile steel ratio in positive bending moment at midspan (round off to 5 decimals) b) design moment strength of section at midspan for positive bending ( in kN•m , nearest whole number) c) nominal design strength of section at face of support for negative bending ( in kN•m , nearest whole number)
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A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with a 4-20mm diamter bars and at the top with 2-16 mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f'c = 32.09 MPa and steel yield strength fy=345 MPa for 20mm bars and fy=275 MPa for 16mm bars. Determine the maximum steel area for a tension-conctrolled singly reinforced condition in positive bending with the given material strength.
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A rectangular beam section is limited to a size of b=250 mm and h=400 mm. Assume that bars in compression will be placed at 60 man from the compression fiber and bars in tension 60 mm from the tension fiber. Given that f'c=21 MPa and fy = 420 MPa 1. Calculate the amount of tension rebars that will have a minimum tensile strain of 0.005 compatible with concrete strain of 0.003 2. If the beam section will be reinforced with tension rebars at a minimum tensile strain of 0.005, calculate the required depth in men of uniform stress block on concrete in compression. 3. With this amount of tension rebars, calculate the design strength of the beam section in kN m. 4. For the beam to sustain a factored moment of 160 kN.m, what will be the required amount of tension steel area in mm² in addition to the tension rebars described in item #1. 5. Considering a doubly reinforced section with tension rebars at a tensile strain of 0.005, calculate the resulting compression stress in MPa…
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Please solve part A and B Subject is reinforced concrete design show all steps
A simply supported beam is reinforced with 5-p25 mm at the bottom and 2-020 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)