T U BÊ TÔNG
[1] TCVN 5574 2012
2012
TCXDVN 356:2005)
[2] , Phan Quang Minh,
2007
3
trang III_1
3.1
3.2
3.3
3.4 -08
T
p
r
P
cr
)
P
y
)
P
u
)
P
ser
(P
o
)
pi
-
pe
-
o
-
D
-
L
-
Phá
q
1
P
2
P
2
P
ULT
P
ULT
Thép A
sp
- - )
-
trang III_2
356:2005, c u n bêtông t p ng c
c n c nh n theo m TTGH.
m TTGH - I: u c.
m TTGH - II: u n m c nh ng.
318 c u n bêtông t p ng c c
n c nh n theo 3
prestress transfer
service load state - SLS
o ser
ultimate load state -
u
.
3.1
3 trang III_3
3.2
3 trang III_4
q
bt
P
o
P
o
Thép A
sp
q
1
P
2
P
2
P
t
P
t
Thép A
sp
t
P
t
< P
o
3 trang III_5
(1) (5) (6) (4) (3) (2)
trang III_6
trang III_7
3 trang III_8
s = 6-8 mm
s)
4-6 mm
8 mm
1 mm