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The effective length of a steel column, effectively held in position and restrained against rotation at both ends is
  • a)
    0.5 L
  • b)
    0.65 L
  • c)
    0.80 L
  • d)
    1.0 L
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The effective length of a steel column, effectively held in position a...
Effective Length of a Steel Column

Effective length of a column is the length of an equivalent pin-ended column, which would buckle under the same load as the given column.

Factors affecting the effective length of a column are:

- End conditions of the column
- Type of loading
- Material properties of the column

Effective Length Factor

The effective length factor is used to determine the effective length of a column. It is denoted by K.

Effective length factor depends on the end conditions of the column. It can be calculated as follows:

- For a column effectively held in position and restrained against rotation at both ends, K = 0.65
- For a column effectively held in position but not restrained against rotation at both ends, K = 0.8
- For a column effectively held in position and restrained against rotation at one end and free to rotate at the other end, K = 1.0
- For a column effectively held in position but not restrained against rotation at one end and free to rotate at the other end, K = 1.2

Effective Length of a Steel Column with Both Ends Restrained

For a steel column effectively held in position and restrained against rotation at both ends, the effective length can be calculated as:

Effective length = K × L

where K = 0.65 and L is the actual length of the column.

Therefore, the effective length of a steel column, effectively held in position and restrained against rotation at both ends, is 0.65 times the actual length of the column. Hence, option B is the correct answer.
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The effective length of a steel column, effectively held in position and restrained against rotation at both ends isa)0.5 Lb)0.65 Lc)0.80 Ld)1.0 LCorrect answer is option 'B'. Can you explain this answer?
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