NormCalcAlb
Short Description
normativa calcolo...
Description
c c f t f u f y q H K K K c K d K N N
> 2 00 0000 00 0000
> 2 00 0000 00 0000
K N
K sσ sσ K sτ sτ K t K u K σ K τ τ
> 2 00 0000 00 0000
K χ N N N t γ γ a γ as as γ f f σ σa σf σm σmin σmax σid σrf σrs σx σy τ τ a τ f f τ m τ rf rf τ rs rs χ
c
σ σ
τ τ
K χ N N N t γ γ a γ as as γ f f σ σa σf σm σmin σmax σid σrf σrs σx σy τ τ a τ f f τ m τ rf rf τ rs rs χ
c
σ σ
τ τ
f u
f u
1,25 1,50 1,80
÷ 1,50 ÷ 1,75 ÷ 2,25
1,15 1,25 1,60
÷ 1,25 ÷ 1,50 ÷ 2,00
1,00 1,10 1,50
÷ 1,05 ÷ 1,25 ÷ 1,75
1,00 1,10 1,50
÷ 1,10 ÷ 1,30 ÷ 1,80
125
2
250
2
500
2
1
0,000012
−
0,000016
−
1
• • • • • • • • • • •
• • • • • • • • •
σid =
σ + σ − σ σ + 3τ 2 x
2 y
x y
2
σ τ
γ
γ a
σrs
≤ 0, 7
•
σrs = f y > 0, 7
•
σrs =
f y + 0, 7f t 2
f y f t f y
f t
τ rs =
σrs 3
√
f t (mm)
(N/mm2 )
(N/mm2 )
f y
γ τ =
τ rs τ
e
γ σ =
σrs σ
γ as = γ spe γ saf γ sac
γ spe γ saf γ sac
γ spe
γ saf
γ sac
χ = σ min /σmax
χ
σm +σa
σm =
σm
σa
σmax + σmin 2
e
σa =
σmax
− σmin 2
σ τ
N t H N t = 60
n h
i i
ni
hi
H = h
i
H
K 1
K =
y c dx
0
y
dx
c
r
σi
N i r
K = i=0
σmax N t =
σi σmax
c
N
i
N t
σi
r i=0 N i
σmax = σ m + max(σa ) σmin = σ m + min(σa ) σm
max(σa )
N = K N τ
·
K
σrf = σ f K N /K σ τ rf = τ f K N /K τ σf
τ f σf
√
τ f = σ f / 3 K σ
K τ K τ = 1
K N σrf
τ rf
K c
K σ
f y
K τ
K τ K σ = K sσ kd K u K c K τ = K sτ kd K u K c
· · · ·
K sσ K d K u K c
K sτ
· ·
− σm
√
f y / 3
− τ m
K sσ K sσ
K sτ
K sτ K sσ
K s
K sσ
K sτ
K sτ K s = q (K t
− 1) + 1
K t
• • • q r
q = 1/(1 + a/r) q = 1
r a
f t (N/mm2 )
f t (N/mm2 )
f t (N/mm2 )
K sσ
K sτ
K sσ
K sτ
K sσ
K sτ
K sσ
K sτ
K sσ
K sτ
K d K d K d K d = 1
K d
K u K u K u
K u
K c K c = 1 K c
K c
K χ
K χ χ
−1
χ
0 K χ =
0
5 3
− 2χ
+1
K χσ =
K χτ =
5/3 1− 1− 5σf 3K σ f t
5/3 1− 1− 5σf 3K τ f t
χ σmin /σmax
τ min /τ max
χ
(2
− f u )/f u
0, 6
f u K N
K N 6
K N =
2 · 10
1/c
N
N c ·
c =
·
ln
N
c
3
f t ·K σ σf ·Kχ 6
ln 28 10 10 ·
c =
6
ln 28 10 10
·
ln
3
f t ·K τ σf ·Kχ
2, 5 2000000
c K (K ) N
c
2000000
c = c +
K N (K N )
√ 2
c +1
γ fσ = γ fτ
(χ)
· σK χσ
γ f σ = σ rf
max
· τ K χτ
γ f τ = σ rf
γ fσ = γ fτ =
max
1 +
K γ σf mt
σa σrf
1
√
3 K γ τ f mt +
τ a τ rf
σm
τ m
K γ
2
≤ 0, 020
S P
Φmax
H 2 2, 0
50
◦
90
◦
50
◦
50
◦
KCU
≤ ≤ <
≤
∆HB
≤
≤
> >
Φ
5
HB
Φ r/2 r/3
Φ
±
±
0
±
÷ 80
2 2,5
Φ
20 H 2 O
÷ 30
÷
Φ mm2
mm2
Φ
mm2
Φ mm
Φ
6
dB/m =
∆ S
∆ dB S
− 6 × 1000
Φ
Φ
6 Φ 6
∆ dB = ∆i dB
− (dB/m − h)
h dB/m ∆i dB ∆ dB
6
6
∆ dB
6
∆ dB
Φ
Φ
Φ
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