: lsb = 7200 , ( ), bsb = 220 , hsb = 400 , ssb = ls = 1700 . : bmb = 250 , hmb =600 .
C35/45 2-1 ( 2)[1] : , , , , , e cu=3,5 , ; .
25/30 w c = 0,810, k2 = 0,416, .
S500 . S500 ( 2-2 2).
3.2
:
:
4.1
, .. beff, () , .. beff=ls= 1575 .
/ 5.
5. 1
, / | , / | ||
1. gsb | |||
- : - : | 4.726 1.55 | 1.35 | 6.39 2.1 |
: gsb | 6.276 | 8.49 | |
2. qsb | |||
12.75 | 1.5 | 19.125 |
:
(gSd+qSd) = ågG×Gk + ågQ×Qk×Ψ0 =
(gSd+qSd) = åx×gG×Gk + gQ,1×Qk,1 + ågQ×Qk×Ψ0 =
.
5 ( ) ( ). 4.2.
4.2 -
.
5-1 5-1 5. , :
:
|
|
6.
6.
- | b | sd, × | ||||||
+b | -b | +sd | -sd | |||||
I | 0.2 | 0.065 | 26.34 × 7.012=1296.2 | 84.3 | ||||
0.4 | 0.09 | 116.7 | ||||||
max | 0.425 | 0.091 | ||||||
0.6 | 0.075 | |||||||
0.8 | 0.02 | |||||||
1.0 | 0.0715 | 92.7 | ||||||
II | 0.2 | 0.018 | 0.035 | 26.34 × 6.952=1272.3 | ||||
0.4 | 0.058 | 0.016 | 73.8 | 16.54 | ||||
max | 0.5 | 0.0625 | - | 79.6 | ||||
0.6 | 0.058 | 0.014 | 73.8 | 12.7 | ||||
0.8 | 0.018 | 0.029 | 34.4 | |||||
1.0 | 0.0625 | 79.5 | ||||||
III | 0.2 | 0.018 | 0.028 | 1272.3 | 22.9 | 35.6 | ||
0.4 | 0.058 | 0.001 | 73.8 | 12.7 | ||||
max | 0.5 | 0.0625 | 0.001 | 79.5 | 12.7 | |||
0.6 | 0.058 | 0.001 | 73.8 | 12.7 | ||||
0.08 | 0.018 | 0.028 | 35.6 | |||||
1.0 | 0.0625 | 79.5 | ||||||
:
:
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Q 11.
3.5.
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35/45: ecu = 3,5 ; .6.5 [2] wc = 0.810, k2 = 0.416, .
S500 Es = 2×105 , .
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