Experimental Study on Strain Penetration Effects in Fixed-End Rotation of RC Beam-Column Connections with High-Strength Reinforcement

Table 6

Design specifications for straight anchorage length of hooked or headed bar.

Code	Straight anchorage length of hooked or headed bar, lah	Commentary
ACI 318-14 [21]		ψe = 1.2 for epoxy-coated reinforcement; ψe = 1.0 for other cases; λ = 0.75 for lightweight concrete; λ = 1.0 for other cases.
Chinese code (GB 50010-2010) [20]		fy is the design value of the reinforcement tensile strength; ft is the design value of the concrete tensile strength; α = 0.14 for deformed bar; α = 0.16 for plain bar.
Eurocode 2-part 1-1 [23]		α1 = 0.7 if cd > 3db; otherwise α1 = 1.0; σsd is the design stress of the bar at the position from where the anchorage is measured; η1 = 1.0 when “good” conditions are obtained; η1 = 0.7 for other cases; η2 = 1.0 for db ≤ 32 mm; η2 = (132−db)/100 for db > 32 mm.