Prenos (1918Kb) - Univerza v Ljubljani

24 Šmon, M. 2007. Program za dimenzioniranje armiranobetonskih gred v skladu s standardom EC8.
Dipl. nal. – UNI. Ljubljana, UL, FGG, Odd. za gradbeništvo, Konstrukcijska smer.
POGOJ NI
IZPOLNJEN
NE
Lokalna duktilnost :
AS
+ Apl
• ρ =
b ⋅ d
W
W
/
AS
• ρ =
b ⋅ d
• ρ ≤ ρ
MAX
/ 0,0018 ⋅ f
CD
= ρ +
µ ⋅ε
⋅ f
Φ SY , D
YD
Projektne notranje sile :
• γ = 1,0
• V
• V
RD
• M
• M
E
i,
d
Rb,
i
MAX
= γ
=
∑ M
Rc
RD
⋅ M
Rb,
i
⋅ min(1, )
∑ M
Rb
+ − + −
{ M , M , M , M }
E
1, rd
⎧ M
⎪
⎪
= max⎨
⎪ M
⎪
⎩
= V + V
−
1, rd
+
1, rd
P
1, rd
+ M
lb
+ M
l
b
−
2, rd
+
2, rd
2, rd
⋅γ
⋅γ
RD
RD
2, rd
Dimenzioniranje strižne armature :
• V
• V
• A
wd , s
wd , s
sw
• s =
= A
A
=
=
sw
0
0
0
0
sw,1
stremen ⋅V
PA ⋅V
⋅ n
V
wd , s
MAX
⋅ 0,9
⋅ d ⋅ f
ywd
MAX
A ..............
sw ,1
stremena
n..........
.........prerez
krat strižno streme
Kontrola tlačnih diagonal:
1
• VRd
,max
= ⋅ν
⋅ f
cd
⋅bW
⋅ 0,9 ⋅
2
f
ck
• ν = 0,6⋅[ 1−
]
250
• V < V
MAX
Rd ,max
NE
PORUŠITEV PO TLAČNIH
DIAGONALAH