A reinforced concrete beam 300 mm width has an effective depth of 450 mm. It is reinforced with 6 –32 mm Ф at the tension side and 2 – 28 mm Ф at the compression side located at 65 mm from the top. Fy = 345 MPa, fc’ = 34.5 MPa. Assume all steel yields and the contribution of compression steel may not be neglected.
A reinforced concrete beam 300 mm width has an effective depth of 450 mm. It is reinforced with 6 –32 mm Ф at the tension side and 2 – 28 mm Ф at the compression side located at 65 mm from the top. Fy = 345 MPa, fc’ = 34.5 MPa. Assume all steel yields and the contribution of compression steel may not be neglected.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A reinforced concrete beam 300 mm width has an effective depth of 450 mm. It is reinforced with 6 –32 mm Ф at the tension side and 2 – 28 mm Ф at the compression side located at 65 mm from the top. Fy = 345 MPa, fc’ = 34.5 MPa. Assume all steel yields and the contribution of compression steel may not be neglected.
1. Which of the following gives the balance steel ratio?
a. 3.8%
b. 5.3%
c. 4.5%
d. 8.4%
2. Which of the following gives the depth of compression stress block?
a. 163 mm
b. 123 mm
c. 134 mm
d. 145 mm
3. Which of the following gives the nominal moment capacity of the beam?
a. 734.5 kN – m
b. 324.6 kN - m
c. 631.2 kN – m
d. 543.4 kN - m
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