European Technical Approval ETA-08/0376 - bei Powers Europe

Page 22 of European technical approval ETA-08/0376, issued on 8 September 2011
Table 15: Design method A:
Characteristic values for tension loads in cracked concrete
Anchor size reinforcing bar ∅ 12 ∅ 14 ∅ 16 ∅ 20 ∅ 25 ∅28 ∅32
Steel failure (Properties acc. to Annex 4)
Characteristic tension resistance,
BSt 500 S acc. to DIN 488-2:1986 or
N Rk,s [kN] 62 85 111 173 270 339 442
E DIN 488-2:2006 5)
Partial safety factor γ Ms,N
1)
Combined pullout and concrete cone failure
Characteristic bond resistance τ Rk,cr [N/mm²] in cracked concrete C20/25
1,40
Temperature range I 4) :
40°C/24°C
Temperature range II 4) :
60°C/43°C
Temperature range III 4) :
72°C/43°C
dry and wet concrete
h ef ≤12d
h ef >12d
flooded bore hole 6) h ef ≤12d 5,5 4,5 4,0 3,5 3,0 3,0 3,0
dry and wet concrete
h ef ≤12d
h ef >12d
flooded bore hole 6) h ef ≤12d 3,0 3,0 2,5 2,5 2,0 2,0 2,0
dry and wet concrete
h ef ≤12d
h ef >12d
flooded bore hole 6) h ef ≤12d 3,0 2,5 2,5 2,0 2,0 2,0 2,0
5,5
5,0
3,0
2,5
3,0
2,5
4,5
4,5
3,0
3,0
2,5
2,5
4,5
4,5
2,5
2,5
2,5
2,5
4,0
4,0
2,5
2,5
2,0
2,0
3,5
3,5
2,0
2,0
2,0
2,0
3,5
3,5
2,0
2,0
2,0
2,0
3,5
3,5
2,0
2,0
2,0
2,0
Partial safety factor (dry and wet concrete)
1)
γ Mp = γ Mc 1,8 2) 2,1 3)
Partial safety factor (flooded bore hole)
1)
γ Mp = γ Mc 2,1 3)
C30/37 1,04
Increasing factors for
C40/50 1,08
concrete ψ c
C50/60 1,10
Splitting failure
Characteristic edge distance c cr,sp [mm]
h≥2h ef
1,0h ef
2,0h ef >h>1,3h ef 5h ef – 2h
h≤1,3h ef
2,4h ef
Characteristic spacing s cr,sp [mm] 2◦c cr,sp
Partial safety factor (dry and wet concrete) γ Msp
1)
Partial safety factor (flooded bore hole) γ Msp
1)
1,8 2) 2,1 3)
2,1 3)
1)
In absence of other national regulations
2)
The partial safety factor γ 2 = 1,2 is included.
3)
The partial safety factor γ 2 = 1,4 is included.
4)
Explanations see chapter 1.2
5) For reinforcing bars, which do not comply with DIN 488: The characteristic resistance N Rk,s shall be
determined acc. to Technical Report TR 029, equation (5.1).
6) Applications in flooded holes only until h ef = 12 d allowed
Regarding design of post-installed rebar as anchor see chapter 4.2
Powers PURE150-PRO Injection resin with anchor rod for concrete
Application with reinforcing bar
Design method A:
Characteristic values for tension loads in cracked concrete
Annex 14
of European
technical approval
ETA-08/0376