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The critical section for determining the maximum bending moment for footing supporting a concrete column is located:
  • a)
    At the face of column
  • b)
    Halfway between the face of column and centre line
  • c)
    At a distance equal to effective depth of footing from the face of column
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
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The critical section for determining the maximum bending moment for fo...
The critical section for determining the maximum bending moment for footing supporting a concrete column is located at the face of the column. This is because the maximum bending moment occurs at the location where the column is fixed to the footing, which is at the face of the column. The bending moment is caused by the eccentricity of the column load with respect to the footing, which creates a moment about the fixed end of the column.

The bending moment is calculated by multiplying the column load by the eccentricity of the load with respect to the footing. The eccentricity is the distance between the center of the column and the point of application of the load on the footing. The maximum bending moment occurs at the face of the column because this is where the eccentricity is maximum.

The design of the footing must take into account the maximum bending moment at the face of the column. The footing must be designed to resist this moment by providing sufficient depth and reinforcing steel. The reinforcement should be placed in the tension zone of the footing to resist the bending moment.

In summary, the critical section for determining the maximum bending moment for footing supporting a concrete column is located at the face of the column because this is where the eccentricity of the column load with respect to the footing is maximum. The design of the footing must take into account this maximum bending moment and provide sufficient depth and reinforcement to resist it.
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The critical section for determining the maximum bending moment for fo...
Location of Critical Section for Determining Maximum Bending Moment in Footing Supporting a Concrete Column

The critical section for determining the maximum bending moment in a footing supporting a concrete column is the location where the bending moment is maximum. This section is important for the design of the footing as it determines the reinforcement required to resist the bending moment.

The location of the critical section depends on the type of loading, the dimensions of the footing, and the distance between the column and the edge of the footing. However, for most cases, the critical section is located at the face of the column.

Explanation

The maximum bending moment in a footing supporting a concrete column occurs when the column is subjected to a maximum eccentricity. The eccentricity is the distance between the centerline of the column and the center of the footing.

When the column is subjected to a maximum eccentricity, a maximum bending moment is generated in the footing. This bending moment is maximum at the face of the column because the moment arm is maximum at this location.

Therefore, the critical section for determining the maximum bending moment in a footing supporting a concrete column is located at the face of the column.

Conclusion

In conclusion, the critical section for determining the maximum bending moment in a footing supporting a concrete column is located at the face of the column. This section is important for the design of the footing as it determines the reinforcement required to resist the bending moment.
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