If a beam fails in bond, then its bond strength can be increased most...
Beam fails in bond, then its bond strength can be increased most economically by using thinner bars but more in number.
Hence the correct answer is option B.
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If a beam fails in bond, then its bond strength can be increased most...
Bond Strength of a Beam
Bond strength is the measure of the adhesion between concrete and reinforcing steel bars. It is important to maintain the bond strength to ensure the safety and durability of the structure. In case of failure in bond, the bond strength of the beam needs to be increased.
Economical Ways to Increase Bond Strength
There are various ways to increase the bond strength of a beam, but the most economical way is to use thinner bars but more in number. This is because:
- Thinner bars can be placed closer to each other, which increases the surface area of the bars in contact with the concrete. This, in turn, increases the bond strength.
- Using more bars also increases the surface area of the bars in contact with the concrete, which further increases the bond strength.
- Thinner bars are less expensive than thicker bars, and using more bars does not significantly increase the cost of the reinforcement.
Other Ways to Increase Bond Strength
Apart from using thinner bars but more in number, there are other ways to increase the bond strength of a beam, such as:
- Increasing the depth of the beam: This increases the distance between the reinforcement bars and the surface of the concrete, which reduces the bond strength. To compensate for this, thicker bars can be used, but this increases the cost of the reinforcement.
- Using thicker bars but less in number: This increases the surface area of the bars in contact with the concrete, but it also increases the cost of the reinforcement.
Conclusion
In conclusion, the most economical way to increase the bond strength of a beam is to use thinner bars but more in number. This increases the surface area of the bars in contact with the concrete, which increases the bond strength, without significantly increasing the cost of the reinforcement.