Technical specification for application of anchorage, grip and coupler for prestressing tendons JGJ 85 2002 J 219 2002 2002 1 21
Technical specification for application of anchorage, grip and coupler for prestressing tendons JGJ 85 202 2003 1 1 2002 2 21
65 JGJ 85 2002 2003 1 1 3.0.2 3.0.3 JGJ 85 92 2002 9 27 3 21
[1998]59 1. JGJ 85 92 2. - η η p 3. A 4. GB T 14370 2000 5. 6. 30 100013 a 4 21
...5 1...6 2...7 2.1...7 2.2...8 3...9 4...11 5...12 6...14 A...17 A.1...17 A.2...18 A.3...20...21 5 21
1 1.0.1 1.0.2 1.0.3 6 21
2 2.1 2.1.1 Anchorage 2.1.2 Grip 2.1.3 Coupler 2.1.4 Prestressing steel 2.1.5 Prestressing tendon 2.1.6 - Prestressing tendon-anchorage assembly 2.1.7 - Prestressing tendon-grip assembly 2.1.8 - Prestressing tendon-coupler assembly 2.1.9 Draw-in 7 21
2.1.10 - Ultimate tensile force of tendon-anchorage assembly - 2.1.11 - Ultimate tensile force of tendon-grip assembly - 2.1.12 Tension length 2.1.13 Efficiency factor of prestressing tendon 2.2 A - p A na p pk n Apk Fapu - Fpm F = f A pm pm p Fgpu - f ptk f pm A pk ε apu - ηa - η g - η p 8 21
3 3.0.1 GB/T 14370 3.0.2 - η a 0.95 2.0% 3.0.3 - η a ε apu ηa p pm ε apu η Fapu a = η F 3.0.3 F apu - Fpm η p η p - 1 5 η =1 6 12 η =0.99 13 19 η p =0.98 20 η p =0 97 p - 0.8 3.0.4-200 f 65 80 80MPa ptk p 9 21
3.0.5 50 0.8 f 90 40 3.0.6 3.0.7 - η g η g pm ptk Fgpu η g = (3.0.7) F F gpu - η 0.92 g - 3.0.8 3.0.9 10 21
4 4.0.1 4.0.1 4.0.1 4.0.2 4.0.3 4.0.4 11 21
5 5.0.1 1 10 2 5 5 3 6 3 3.0.2 3.0.2 F pm 1 2 3.0.4 5.0.2 3.0.7 5.0.3 12 21
5.0.4 1000 2000 500 5.0.5 A 13 21
6 6.0.1 6.0.2 6.0.3 6.0.4 6.0.5 6.0.6 6.0.7 2 5mm 6.0.8 6.0.9 6.0.10 6.0.11 14 21
6.0.12 6.0.13 0.8 f 6.0.14 GB50010 6.0.15 6.0.16 6.0.17 30mm 6.0.18 6.0.19 6.0.20 ptk 15 21
20mm 50mm 1 2 6.0.21 PE 16 21
A A.1 A.1.1-3m 0.8m A.2.1-1 A.2.1-2 7 A.1.2 3 6 f pm f 1.05 f ptk A.1.3 2 0.2 0.1 pm 17 21
A.2 A.2.1 A.2.1-1 - A.2.1-2 f 5 10 1m f 20 40 60 80 4 100MPa 80 1h F ap u ptk ε apu A.2.2-0.8 10min ptk 18 21
- 3.0.2 A.2.2 l 4 a A.2.2 a 2 4 b A.2.2 b F apu 19 21
3 F apu 4 ε apu 5 0.8 f 1h 20 30min ptk a b a b 6 3.0.3 ηa 3.0.7 η g 1 6 A.3 A.3.1 GB/T 14370 A.3.2 GB/T 14370 20 21
1. 1 2 3 2. 21 21