engineering recuitment GATE CE 2023-24 Test Series Reinforced Concrete Structures Bond, Anchorage and Development Length
If ϕ = nominal diameter of reinforcing bar, fs = compressive stress in the bar and fbd = design bond stress of concrete,
Which of the following statements are true for development length (Ld)1
Development length of straight bar in compression is \({L_d} = \frac{{\phi \times {f_s}}}{{5 \times {f_{bd}}}}\)
2
Development length of deformed reinforcement bar is \({L_d} = \frac{{\phi \times {f_s}}}{{5 \times {f_{bd}}}}\)
3
Development length of deformed reinforcement bar is \({L_d} = \frac{{\phi \times {f_s}}}{{6.4 \times {f_{bd}}}}\)
4
Development length of straight bar in compression is \({L_d} = \frac{{\phi \times {f_s}}}{{6.4 \times {f_{bd}}}}\)