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The limits of percentage 'p' of the longitudinal reinforcement in a column are given by _________.
- a)0.15% to 2%
- b)0.8% to 4%
- c)0.8% to 6%
- d)0.8% to 8%
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The limits of percentage 'p' of the longitudinal reinforcement...
As per IS 456 : 2000, the minimum percentage of steel is 0.8% and maximum percentage of steel is 6%. Although as per practical consideration the maximum percentage of steel is limited to 4% only.
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The limits of percentage 'p' of the longitudinal reinforcement...
The limits of percentage p of the longitudinal reinforcement in a column are given by 0.8% to 6%. This means that the percentage of longitudinal reinforcement in a column should be between 0.8% and 6% of the cross-sectional area of the column.
Why are there limits on the percentage of longitudinal reinforcement in a column?
- Ensuring Adequate Strength and Ductility:
The percentage of longitudinal reinforcement in a column is limited to ensure that the column has adequate strength and ductility. The reinforcement helps to resist the tensile forces and provide ductility to the column under loading conditions. By limiting the percentage of reinforcement, the column can achieve the desired strength and ductility characteristics.
- Preventing Excessive Steel Congestion:
Excessive steel congestion can occur if the percentage of longitudinal reinforcement is too high. This can lead to difficulties in placing and compacting the concrete, as well as increased chances of honeycombing and poor bond between the reinforcement and concrete. By setting limits on the percentage of reinforcement, these issues can be avoided.
- Controlling Crack Width:
Another reason for limiting the percentage of longitudinal reinforcement is to control the crack width in the column. Excessive reinforcement can result in narrower cracks, which can affect the durability of the column. By setting limits on the percentage of reinforcement, the crack width can be controlled within acceptable limits.
- Economic Considerations:
The percentage of longitudinal reinforcement in a column also has economic implications. Too much reinforcement can increase the cost of construction, as more steel is required. By setting limits on the percentage of reinforcement, a balance can be achieved between structural requirements and cost-effectiveness.
Conclusion:
In conclusion, the limits of percentage p of the longitudinal reinforcement in a column are given by 0.8% to 6%. These limits ensure that the column has adequate strength and ductility, prevent excessive steel congestion, control crack width, and consider economic considerations. By adhering to these limits, the column can perform effectively and efficiently.
Why are there limits on the percentage of longitudinal reinforcement in a column?
- Ensuring Adequate Strength and Ductility:
The percentage of longitudinal reinforcement in a column is limited to ensure that the column has adequate strength and ductility. The reinforcement helps to resist the tensile forces and provide ductility to the column under loading conditions. By limiting the percentage of reinforcement, the column can achieve the desired strength and ductility characteristics.
- Preventing Excessive Steel Congestion:
Excessive steel congestion can occur if the percentage of longitudinal reinforcement is too high. This can lead to difficulties in placing and compacting the concrete, as well as increased chances of honeycombing and poor bond between the reinforcement and concrete. By setting limits on the percentage of reinforcement, these issues can be avoided.
- Controlling Crack Width:
Another reason for limiting the percentage of longitudinal reinforcement is to control the crack width in the column. Excessive reinforcement can result in narrower cracks, which can affect the durability of the column. By setting limits on the percentage of reinforcement, the crack width can be controlled within acceptable limits.
- Economic Considerations:
The percentage of longitudinal reinforcement in a column also has economic implications. Too much reinforcement can increase the cost of construction, as more steel is required. By setting limits on the percentage of reinforcement, a balance can be achieved between structural requirements and cost-effectiveness.
Conclusion:
In conclusion, the limits of percentage p of the longitudinal reinforcement in a column are given by 0.8% to 6%. These limits ensure that the column has adequate strength and ductility, prevent excessive steel congestion, control crack width, and consider economic considerations. By adhering to these limits, the column can perform effectively and efficiently.
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The limits of percentage 'p' of the longitudinal reinforcement in a column are given by _________.a)0.15% to 2%b)0.8% to 4%c)0.8% to 6%d)0.8% to 8%Correct answer is option 'C'. Can you explain this answer?
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