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1 Technical specification for concrete structures reinforced with welded steel fabric JGJ J

2 Technical specification for concrete structures reinforced with welded steel fabric JGJ

3 161 JGJ JGJ T

4 @ [2000] 284 JGJ T A E

5 A B C D

6 ... E

8 2.1.1 welded fabric cold rolled ribbed steel wire cold drawn rolled plain steel wire hot rolled ribbed steel bar spacing twin bars ovethang lap Of welded fabric 8

9 2.1.9 normal overlapping nesting back overlapping a b

10 lap length of welded fabric welded stirrup cage bottom fabric a b top fabric bridge deck pavement reinforced concrete pavement tunnel 10

11 2.2.1 M M k M q σ sk E s f stk f yk f y f y f c a s a s b T I d h 0 l a x A s A s 11

12 B B s ξ b α E ρ v ψ 12

13 CRB550 HRB400 CPB550 GB T A mm 12mm 0.5mm 5 12mm 6 16mm 2 12m 3.3m 3 100m 150mm 200mm mm 10mm mm f f f stk yk yk f stk 13

14 3.1.4 N mm 2 mm f stk f yk CRB550 R HRB CPB550 cp f f y N mm 2 y f y f y CRB550 R HRB CPB550 cp N/mm 2 300N/mm E s N mm 2 E s E s CRB HRB CPB f σ f ρ s = σ f s,min f s,max ρ s 14

15 f σ σ s, min f s, max N mm 2 f 0.3 ρ s 80N mm C20 C30 GB GB GB CJJ 37 JTG D40 JTJ

16 GB GB GB m l0 l 0 /200 l 0 /250 7m 9m l0 l 0 /250 l 0 / l l

17 4.1.4 mm GB JTG D GB T x M α f cbx h + f y A s ( h α s ) α f bx = f A f A c y s y s 17

18 4.2.2 x ξ b h 0 x 2 a M c s f A s A s h 0 b T x α s α1 1 ξ b C50 α 1.0 α 1 C C50 CRB550 CPB550 ξ =0.37 HRB400 ξ =0.52 C50 b ξ b b 18

19 HRB400 C50 =0.37 ξ b GB GB C20 10mm CRB550 HRB400 20mm w max mm σ d sk dq w = max α crψ 1.9c E s ρ te 0.65 f ψ = α tk ρ σ te sk M k σ sk = A h s 0 nid 2 i d eq = n v d i i i 19

20 α α =1.9 cr =2.1 ψ ψ 0.1 ψ =0.1 ψ σ sk 1 ψ =1 ψ α cr cr E s α =1.05 α =1.1 α c mm ρ te M k d eq ρ te = A s /( 0. 5bh) 0.01 ρte ρte =0.01 mm vi i v i =1.0 v =0.7 i d i n i i mm i B T T I B B = M q M k s ( θ 1) + M k B

21 M k M q B s θ = B s 2 Es As h0 6α E ρ 1.15ψ r ( b b) f B s ( ) h f f r f = ( ) bh 0 ψ ψ 0.1 ψ =0.1 ψ 1.0 ψ =1.0 ψ =1.0 α E ρ ρ = A s /( bh0 ) E s r f b T I b f h f h f 0.2 h0 h f =0.2 h0 21

22 mm C20 C25 C45 C a b C20 5mm 15mm 2 10mm 15mm 3 40mm 70mm f / f t y b b h ( t ) f JTG D40 22

23 8mm 200mm 300mm 50mm mm 6 10mm 20mm B JGJ mm 5 10mm mm l a l a mm C20 C25 C30 C35 C40 CRB d 35 d 30 d 28 d 25 d 30 d 26 d 23 d 21 d 20 d HRB d 40 d 35 d 32 d 30 d 35 d 31 d d 25 d 23 d

24 d d 3 d mm 200mm 250mm 4 d mm mm l a la mm C20 C25 C30 C35 C40 35 d 30 d 27 d 25 d 23 d mm 3 d mm CRB550 HRB400 24

25 l mm 50mm a l a d 10mm 5d mm mm 25

26 mm a b 20 d d 150mm c 20 d 200mm d 8mm 5 d d d 250mm d 25 d d 200mm 26

27 a b c l ae l =1.15 l ae a l =1.05 l ae a 27

28 l = l ae l a a 2 l 1.3 l d 10mm le ae 5 d mm 1 h 150mm 200mm 2 h 150mm 1.5 h 250mm mm d d 100mm mm mm 200mm mm 5.2.5a 5.2.5b 28

29 mm 200mm l 7 l l 4 l mm 250mm 200mm d 30 d

30 a b a b

31 mm

32 a b a b

33 GB m GB mm 150mm 8mm 300mm mm h h GB w w 33

34 mm 40 d d U 5.3.8a 90º 5 d 10 d 50mm 2 5 d 10 d 50mm 5.3.8b 5.3.8c d 5.3.8e

35 5.3.8 a b c T d L e mm 35

36 700mm º mm 15 d d 3 d 4 d 5mm º º U 2 3 8mm 8mm 800mm 6mm d 4 d 4 C GB

37 t D D 4 E t GB mm 37

38 m mm GB

39 A A.0.1 kg/m 2 mm mm mm 2 /m mm mm /m A A A A A A A A A A B B B B B B B B B B

40 A.0.1 kg/m 2 mm mm /m mm mm mm 2 /m C C C C C C C C C C D D D D D D D D D D

41 A.0.1 kg/m 2 mm mm /m mm mm mm 2 /m E E E E E E E E E E kg/m mm 16mm 41

42 B A B.0.1 mm mm kg/m B

43 C C º 10 C.0.1a 90º 5 C.0.1b C.0.1 C.0.2 U C.0.2a b C.0.2 U 43

44 D D D.0.2 D.0.2 D.0.2 mm mm % mm 2 D.0.3 D.0.3 D.0.3 mm d d

45 E E.0.1 GB T E.0.2 GB T 701 E mm GB E.0.3 E.0.3 δ % σ b º N/mm 2 CPB D = 3d 1 σ σ 80% p0.2 2 δ 10 d 10 3 D d b E mm 20mm E.0.4 E E

46 E.0.4 a b E.0.5 a b 46

47 N a

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