美标钢筋搭接和锚固长度

f y 420f c '31ψt 1.3ψe 1.0λ 1.0ψt ψe

1.3

1444.4518

57.15

375.00487.50443.53576.58554.41720.73665.29864.87776.171009.02887.051153.17997.931297.311108.811441.461219.691585.601552.34

2018.04

tension em

hooks of specia the development length of special moment frames *1.3d b

tension development

tension em

hoo

3、带90度标准弯钩的水平段长度Ldh计算依据12.5.2。（未考虑12.5.3中的折减系数）

4、特殊框架中的Ldh计算依据21.5.4。

水平配置布置的位置使其有大于300mm厚的新浇筑于强度发挥长度或接头以下无涂层钢筋非轻质混凝土

lap-splice length (CLASS B) *1.32、搭接长度依据12.15.1，A、B等级接头的定义依据条文说明R12.5.2

1、计算依据ACI12.2.2

NOMINAL DIAMETER

180.001071.26

230.0013126.68

290.0016197.93

350.0019285.02

410.0022387.95

460.0025506.71

520.0029641.30

580.0032791.73

640.0036957.99

810.00

43

57

160.00

180.00

230.00

270.00

320.00

360.00

400.00

450.00

490.00

630.00

on embedment lengths for standard end

hooks of special moment frames

on embedment lengths for standard end

hooks

12.5.2。（未考虑12.5.3中的折减系数）

头以下