Ngày tải lên :
14/03/2015, 10:09
... ự
Q
d
Ql
k
W
M
k
dd
t
ACB
ACB
14 01, 1
32
4
2
3
11
1
====→
π
σσ
=>
Q
ACB
14 0
max
==
σσ
P
D
Q
a
B
A
C
1m
1m
1m
2. Ta có:
[ ]
[ ] [ ]
[ ]
[ ]
kNdaNQ
Q
14 3,029 ,14
14 0
14 0
max
===→
=→
≤
σ
σ
σσ
3. ...
cm
EF
lN
l
AD
AD
08,0
210 .2
10 054 ,14 2,2
4
=
ì
ìì
==
cmv
t
D
13 9,008,0059,0 =+=
cmv
d
D
15 29, 01, 113 9,0 =ì=
Bi 2: M t c t làm b g thép CT 31 mc ch L đ u cánh s hi u 10 0x100x10 cao l = 1m,ộ ộ ằ ữ ề ố ệ ...
kNdaNlFQ
d
22, 018 ,22200 .12 .6.54 ,1
====
Tớnh k
d
:
cm
EJ
lQ
EJ
Ql
EJ
Pl
d
t
45,0
384
.5
4848
3
3
3
=++=
+
+
++=
P
QQ
h
k
d
t
d
.
1
2
11
à
v i :
35
17
=
à
54,3
1, 0
22,0.
35
17
2,0
13 1,0
5.2
11
=
+
+
++=
d
k
V...