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In a check for development length (Ld), Ld shall not exceed M1/V + Lo where M1 is moment of resistance of the section after bar curtailment, V is maximum shear in the region of M1 and Lo at discontinuous end is
  • a)
    equal to 12 Φ(Φ is diameter of bars) or effective depth `d` whichever is greater
  • b)
    actual anchorage length provided beyond centre of support
  • c)
    straight length of bar beyond centre of support plus the hook or bend allowance if provided
  • d)
    Ld/3
Correct answer is option 'A'. Can you explain this answer?
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In a check for development length (Ld), Ld shall not exceed M1/V + Lo...
Development Length (Ld)

Development length (Ld) is the length of reinforcement required beyond a critical section to develop the full strength of the reinforcement. It is an important parameter in reinforced concrete design as it ensures proper anchorage of reinforcement bars to transfer the forces between different sections of a reinforced concrete member.

Check for Development Length (Ld)

To determine the development length required, a check is performed to ensure that the calculated development length (Ld) does not exceed the value of M1/VLo, where M1 is the moment of resistance of the section after bar curtailment, V is the maximum shear in the region of M1, and Lo is the effective length at the discontinuous end.

Options for Lo

Lo, the effective length at the discontinuous end, is determined based on the following options:

a) Equal to 12 Φ (Φ is the diameter of bars) or effective depth 'd' whichever is greater
b) Actual anchorage length provided beyond the center of support
c) Straight length of bar beyond the center of support plus the hook or bend allowance if provided
d) Ld/3

Explanation of Option A

Option A states that Lo is equal to 12 Φ or effective depth 'd', whichever is greater. This means that Lo should be equal to the larger value between 12 times the diameter of the bars and the effective depth of the section.

This option ensures that an adequate length of reinforcement is provided beyond the critical section to develop the full strength of the reinforcement. The larger value between 12 Φ and 'd' is chosen to ensure a sufficient anchorage length.

By selecting the greater value, the design ensures that the development length is not compromised and that the reinforcement bars are properly anchored to resist the applied forces.

This option is considered the correct answer because it provides a conservative estimate for the development length, ensuring the safety and structural integrity of the reinforced concrete member.

Overall, option A ensures that an adequate length of reinforcement is provided beyond the critical section, considering both the diameter of the bars and the effective depth of the section. This helps in achieving the required development length and ensuring the proper transfer of forces in the reinforced concrete member.
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In a check for development length (Ld), Ld shall not exceed M1/V + Lo...
Equal to 12 (is diameter of bars) or effective depth `d` whichever is greater
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In a check for development length (Ld), Ld shall not exceed M1/V + Lo where M1 is moment of resistance of the section after bar curtailment, V is maximum shear in the region of M1 and Lo at discontinuous end isa)equal to 12 Φ(Φ is diameter of bars) or effective depth `d` whichever is greaterb)actual anchorage length provided beyond centre of supportc)straight length of bar beyond centre of support plus the hook or bend allowance if providedd)Ld/3Correct answer is option 'A'. Can you explain this answer?
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In a check for development length (Ld), Ld shall not exceed M1/V + Lo where M1 is moment of resistance of the section after bar curtailment, V is maximum shear in the region of M1 and Lo at discontinuous end isa)equal to 12 Φ(Φ is diameter of bars) or effective depth `d` whichever is greaterb)actual anchorage length provided beyond centre of supportc)straight length of bar beyond centre of support plus the hook or bend allowance if providedd)Ld/3Correct answer is option 'A'. 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 In a check for development length (Ld), Ld shall not exceed M1/V + Lo where M1 is moment of resistance of the section after bar curtailment, V is maximum shear in the region of M1 and Lo at discontinuous end isa)equal to 12 Φ(Φ is diameter of bars) or effective depth `d` whichever is greaterb)actual anchorage length provided beyond centre of supportc)straight length of bar beyond centre of support plus the hook or bend allowance if providedd)Ld/3Correct answer is option 'A'. 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 In a check for development length (Ld), Ld shall not exceed M1/V + Lo where M1 is moment of resistance of the section after bar curtailment, V is maximum shear in the region of M1 and Lo at discontinuous end isa)equal to 12 Φ(Φ is diameter of bars) or effective depth `d` whichever is greaterb)actual anchorage length provided beyond centre of supportc)straight length of bar beyond centre of support plus the hook or bend allowance if providedd)Ld/3Correct answer is option 'A'. Can you explain this answer?.
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