Civil Engineering MCQAE Level Civil Engineering
The development length L_d for a deformed bar in tension as per IS 456:2000 is given by:
RCCDevelopment LengthMEDIUM
Choose the correct answer
A
L_d = φ × f_s / (4τ_bd)
B
L_d = φ × f_y / (4 × 1.6 × τ_bd)
C
L_d = φ × σ_s / (4τ_bd)
D
L_d = 40φ for all conditions
Correct Answer
C. L_d = φ × σ_s / (4τ_bd)
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L_d = φ × σ_s / (4τ_bd), where σ_s is the actual stress in the bar at the section, τ_bd is the design bond stress, φ is bar diameter. For full development: σ_s = 0.87f_y.
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