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As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.
Correct answer is '(0.17)'. Can you explain this answer?
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As per IS 456 : 2000, the minimum percentage of tension reinforcement ...
Minimum percentage of steel (for Fe500)
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As per IS 456 : 2000, the minimum percentage of tension reinforcement ...
Minimum Percentage of Tension Reinforcement in Reinforced-Concrete Beams
The minimum percentage of tension reinforcement required in reinforced-concrete beams of rectangular cross-section is specified in IS 456:2000, the Indian Standard code of practice for plain and reinforced concrete.
Effective Depth and Area Calculation
- The effective depth of a beam is the distance from the extreme compression fiber to the centroid of the tension reinforcement.
- It is important to consider the effective depth in the calculation of the area of tension reinforcement to ensure the beam's strength and durability.
Fe500 Grade Steel
- Fe500 grade steel is a commonly used high-strength reinforcement steel in India.
- It has a yield strength of 500 MPa, indicating its ability to resist deformation under tension.
Relevant Clause in IS 456:2000
- The minimum percentage of tension reinforcement is specified in Clause 26.5.1.1 of IS 456:2000.
Explanation of the Answer
- According to IS 456:2000, for beams in flexure, the minimum percentage of tension reinforcement is given by the expression:
ρ_min = (0.85 × f_ck) / (fy × γ_s)
Where:
ρ_min = minimum percentage of tension reinforcement
f_ck = characteristic compressive strength of concrete
fy = characteristic yield strength of reinforcement steel
γ_s = partial safety factor for steel
- For Fe500 grade steel, the characteristic yield strength (fy) is 500 MPa.
- The characteristic compressive strength of concrete (f_ck) depends on the grade of concrete used in the beam.
- For M20 grade concrete, f_ck = 20 N/mm².
- The partial safety factor for steel (γ_s) is taken as 1.15 as per IS 456:2000.
- Substituting the values in the expression, we get:
ρ_min = (0.85 × 20) / (500 × 1.15) = 0.17 (rounded to two decimal places)
Conclusion
- The minimum percentage of tension reinforcement required in reinforced-concrete beams of rectangular cross-section, considering the effective depth in the calculation of area, using Fe500 grade steel is 0.17 as per IS 456:2000.
The minimum percentage of tension reinforcement required in reinforced-concrete beams of rectangular cross-section is specified in IS 456:2000, the Indian Standard code of practice for plain and reinforced concrete.
Effective Depth and Area Calculation
- The effective depth of a beam is the distance from the extreme compression fiber to the centroid of the tension reinforcement.
- It is important to consider the effective depth in the calculation of the area of tension reinforcement to ensure the beam's strength and durability.
Fe500 Grade Steel
- Fe500 grade steel is a commonly used high-strength reinforcement steel in India.
- It has a yield strength of 500 MPa, indicating its ability to resist deformation under tension.
Relevant Clause in IS 456:2000
- The minimum percentage of tension reinforcement is specified in Clause 26.5.1.1 of IS 456:2000.
Explanation of the Answer
- According to IS 456:2000, for beams in flexure, the minimum percentage of tension reinforcement is given by the expression:
ρ_min = (0.85 × f_ck) / (fy × γ_s)
Where:
ρ_min = minimum percentage of tension reinforcement
f_ck = characteristic compressive strength of concrete
fy = characteristic yield strength of reinforcement steel
γ_s = partial safety factor for steel
- For Fe500 grade steel, the characteristic yield strength (fy) is 500 MPa.
- The characteristic compressive strength of concrete (f_ck) depends on the grade of concrete used in the beam.
- For M20 grade concrete, f_ck = 20 N/mm².
- The partial safety factor for steel (γ_s) is taken as 1.15 as per IS 456:2000.
- Substituting the values in the expression, we get:
ρ_min = (0.85 × 20) / (500 × 1.15) = 0.17 (rounded to two decimal places)
Conclusion
- The minimum percentage of tension reinforcement required in reinforced-concrete beams of rectangular cross-section, considering the effective depth in the calculation of area, using Fe500 grade steel is 0.17 as per IS 456:2000.
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As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer?
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As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer?.
As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for As per IS 456 : 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced-concrete beams of rectangular cross-section (considering effective depth in the calculation of area) using Fe500 grade steel is __________________.Correct answer is '(0.17)'. Can you explain this answer?.
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