A rectangular beam section is limited to a size of b = 250 mm and h = 450 mm. Assume that bars in compression will be placed at 60 mm from the compression fiber and bars in tension 60 mm from the tension fiber. Given that f’c = 21 MPa and fy = 420 MPa: For the beam to sustain a factored moment of 160 kN.m, what will be the required amount of tension steel area in mm2in addition to the tension rebars described in item #1. (M to P) Considering a doubly reinforced section with tension rebars at a tensile strain of 0.005, calculate the resulting compression stress in MPa on rebars to be used in the compression zone. (Q to T) 3. Calculate the required amount of compression bars to sustain the required 160 kN.m factored moment. (U to X)
A rectangular beam section is limited to a size of b = 250 mm and h = 450 mm. Assume that bars in compression will be placed at 60 mm from the compression fiber and bars in tension 60 mm from the tension fiber. Given that f’c = 21 MPa and fy = 420 MPa: For the beam to sustain a factored moment of 160 kN.m, what will be the required amount of tension steel area in mm2in addition to the tension rebars described in item #1. (M to P) Considering a doubly reinforced section with tension rebars at a tensile strain of 0.005, calculate the resulting compression stress in MPa on rebars to be used in the compression zone. (Q to T) 3. Calculate the required amount of compression bars to sustain the required 160 kN.m factored moment. (U to X)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A rectangular beam section is limited to a size of b = 250 mm and h = 450 mm. Assume that bars in compression will be placed at 60 mm from the compression fiber and bars in tension 60 mm from the tension fiber. Given that f’c = 21 MPa and fy = 420 MPa:
- For the beam to sustain a factored moment of 160 kN.m, what will be the required amount of tension steel area in mm2in addition to the tension rebars described in item #1. (M to P)
- Considering a doubly reinforced section with tension rebars at a tensile strain of 0.005, calculate the resulting compression stress in MPa on rebars to be used in the compression zone. (Q to T)
3. Calculate the required amount of compression bars to sustain the required 160 kN.m factored moment. (U to X)
ANSWERS:
|
1. 291 |
|
2. 353.8 |
|
3. 346 |
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