̲
1. ............................................................4
1.01. ................................................................4
1.02. .......................................................................................5
1.03. ..............................................................................5
1.04. ..............................................................7
1.05. ................................10
1.06. ..................................................11
2. ....................................................................................12
3. ...........................................................................................14
4. ....................................................................................................16
ί 29-14
1.01. .
1.02.
15, = 0,9;
Rb = 0.9 8,5 = 7,65 , Rbt= 0,9 0,75 = 0,68 .
400, Rs=365 - d = 5 , Rs = 360 ; Rsw=260 , d = 4 , Rs = 370 .
1.03.
. = , = 0,885 .
ϳ 1 2 , /2
ϳ | . | |||
: 1. 2. () | 0,09 25000 | 1,1 1,2 | ||
, . b = 1 , .
= .
= 1,5
h0 = h a= 7 1.5 = 5.5
0 =
. 3.1 . 89 . =0,984.
As = 2 = 0,305 2< As,min = = = 0.002 100 5.5 = 1.1 2.
, As = 1,31 2.
Ø5 .
1.04. .
1.04.1. ,
:
h = 33 , , , bf = 16 , hf = 7 .
|
|
:
= 0,5 88,5 + 11 = 55,25
=1/6 297 + 11 = 60,5
= 55 .
ϳ 1 , /.
ϳ | . | . | ||
1. 2. 3. | (0,16 0,07 + +0,26 0,095) 25000 | 1,1 1,1 1,2 | ||
: | q1 = 19919 | |||
4. 5. | 1,1 1,2 | |||
: | q2 = 3759 |
= 25.92 ͷ
1.04.2.
.
= 3 , h0 = h = 33 3 = 30 .
:
=
=
, . = 55 .
0 =
: .
. 3.1 =0,96.
As =
2 Ø14 400, As = 3,08 2.
1.04.3. .
Q k1Rbtbh0, k1 = 0,6
k1Rbtbh0 = 0,6 0,68 103 0,095 0,3 = 11,63 < Q = 34,13
, .
Q 0.3 Rb1b b h0,
= 1 - Rb = 1 0,01 7,65 = 0,924, = 0,01 ;
= 1,1,
0.3 Rb1b b h0 = 0,3 1,1 0,924 7,65 103 0,095 0,3 =
= 66,48 > Q = 34,13
, .
Ø5 -.
' 2 Asw = 0,392 2.
h < 45
S = 16,5 , S 15
S = 15 ¼ .
S = 30 .
:
qsw = /
,
Qb,sw=
= ,
=2,
=0,75 =0,387 < 0,5
: .
1.05.
1.05.1. , = 2,97.
, b= 11 , h= 20 , h = 7 ,
b = 0,5 88,5+11= = 55 .
|
|
= 2,5 ,
h0 = h = 20 2,5 = 17,5 .
ϳ 1 , /.
ϳ | - | - | - | |
1. | 1,1 | |||
2. | 1,1 | |||
3. | 1,2 | |||
: | qn= 3,565 | q= 4144 |
=
Q =
1.05.02.
.
)=
=
, .
= 55 .
0 =
. 3.1 =0,983
As =
̳
As min = = 0.005 11 17.5 = 0.963 2
1 Ø12 400, As = 1,13 2
Q k1Rbtbh0/
k1Rbtbh0 = 0.6 0.68 103 0.11 0.175 = 7.85 >Q = 5,12 .
, .
Ø5 - S = 100 , ¼ S = 200 .