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FAQ

⇐ 12345678



6.1

- b×h B , l0, A, N ( Nl /N). :

1 7: , ;

8 16: , ;

17 28: , .

. 6.1. 1, 68, 11, 1517, 22, 2428 . 6.1, , 25, 9, 10, 1214, 1821, 23 . 6.1, .

. 6.1 - :

,

1. . 1 2 (. 1) .

2. .

3. .

4. [5, . 6] .

5. .

6. .

6.1 -

b, h, l0, , N, Nl/N ,
  0.4 0.4 4.4 4Ø25A-III B30 4.2 0.5 0.1
  0.4 0.6 10.8 6Ø25 A-III B30 7.0 0.5 0.12
  0.4 0.6 9.6 6Ø25 - 25 6.0   0.12
  0.4 0.4 8.0 6Ø20 A-III 20 2.8   0.1
  0.5 0.6 12.0 6Ø22 A-III 25 5.9   0.12
  0.4 0.4 7.2 4Ø20 A-III 20 2.74   0.1
  0.4 0.4 7.2 4Ø20 A-III 20 3.0 0.5 0.1
  0.4 0.4 4.4 4Ø25A-III B30 6.2 0.5 0.1
  0.4 0.4 10.8 6Ø25 A-III B30 9.6 0.5 0.12
  0.4 0.6 9.6 6Ø25 A-III 25 7.9   0.12
  0.4 0.4 8.0 4Ø20 A-III 20 3.6   0.1
  0.5 0.6 12.0 6Ø22 A-III 25 8.0 0.5 0.12
  0.5 0.6 7.2 6Ø22 A-III 25 8.8 0.5 0.12
  0.5 0.6 7.2 6Ø22 A-III 25 11.7   0.12
  0.4 0.4 7.2 4Ø20 A-III 20 3.7   0.1
  0.4 0.4 7.2 4Ø20 A-III 20 4.1 0.5 0.1
  0.4 0.4 4.4 4Ø25 A-III B30 6.2 0.5 0.1
  0.4 0.6 8.4 6Ø22 A-III B30 9.6   0.1
  0.4 0.6 8.4 6Ø22 A-III B30 10.0   0.1
  0.4 0.6 10.8 6Ø25 A-III B30 13.6 0.5 0.12
  0.4 0.6 9.6 6Ø25 A-III 25 9.5   0.12
  0.4 0.4 8.0 4Ø20 A-III 20 4.5   0.1
  0.5 0.6 12.0 6Ø22 A-III 25 5.8   0.12
  0.4 0.4 7.2 4Ø20 A-III 20 4.68   0.1
  0.4 0.4 7.2 4Ø20 A-III 20 5.4 0.5 0.1
  0.4 0.4 7.2 4 Ø20 A-III 20 2.85   0.1
  0.4 0.4 7.2 4 Ø20 A-III 20 3.6   0.1

7.1

, As = 10 2, b = 0,25 .

25. -III.

7.2

, , ξ = 0,25, b = 0,25. 25.

M = 0,15.

7.3

, As = 5 2, b = 0,2 , h0 = 0,45 . 15. A-III.

7.4

A-III , 0,02 2. 25.

7.5

, M = 0,09, η = 0,94, h0 = 0,45 . A-III.

7.6

, A-III 82, b×h0 = 0,2×0,5 . 25.


7.7

15 30? b×h0 = 0,2×0,4 A-III (μ = l%) .

7.8

μ1 = 0,5%, μ2 = 1%? b×h0 = 0,2×0,5 15 . A-III.

7.9

A-III μ1 = 0,5%, μ2 = 1% 15 B 30?

b×h0 = 0,2×0,5 .

7.10

b×h0 = 0,2×0,5 15. -III (As = 15 2). As = 5 2.

?

7.11

A-III - 0,4×0,4 , 0,4 .

7.12

( ) , b/f = 0,3 , h /f = 0,06 ? 25. A-III, As =10 2.

7.13

( ) , b/f = 0,4 , h/f = 0,1 , h0 = 0,55 , M = 0,15 ? 15.

7.14

, b/f = 0,5 , h/f = 0,1 , h0 = 0,8 , b = 0,2 , M = 0,6 ? 25. A-III.

7.15

, b/f = 0,4 , h/f = 0,1 , h0 = 0,45 , b = 0,2 . 15.

-III. As = 20,24 2.

7.16

σsp, 1 σsp, 2 , σsp,0 = 800 , , :

  • 70;
  • 20;
  • 30;
  • 60;
  • 30.

7.17

σsp, 0 = 800 . σsp, 1 σsp, 2, , :

  • 60;
  • 80;
  • 80;
  • 20;
  • 30;
  • 30.

7.18

1. 4×10-2 2 Rbp = 30 , A-III, 3×10-4 2, -7 10×10-4 2 900 ?

7.19

0,2×0,2, , Rbp = 30, ?

Asp = 10×10-4 2, σsp, 1 = 900 , As =3×10-4 2.

7.20

, - 25 0,4×0,4 . AT-VI, 8×10-4 2 500 .

7.21

- 0.3×0.3 B30, -7 10×10-2, σsp,2 = 800 , 95×10-2 ?

7.22

σsp, 2 -7, 8×10-4 2, B 25 5×10-2 2, 60×10-2 ?

7.23

50×10-2 . B 25, P 2 = 40×10-2 T-VI 10×10-4 2.

?

7.24

- : Asp = 8×10-2 2, B 25, A-IV, = 6×10-4 2, σsp = 600 , 42×10-2 , 25×10-2 MH?

7.25

B 30 1,4×10-3 3, 50×10-2 ?

7.26

B 30 1,4×10-2 3, 50×10-2 .

7.27

25 2,0×10-2 3 60×10-2 , 5 0×10-2 ?

7.28

0,5×0,1 (b×h) 15 0,1 ?

7.29

0,4×0,6 (b×h) 25.

7.30

0,4×0,4 . 0,1 . , 1,0 . . .

7.31

0,4×0,4 15 0,02 2. 0,6 ?

7.32

0,4×0,4 , 0,6 , 0,022.

7.33

M 125 100. 0,15×0,15 , λh = 15.

7.34

M 150 - 100. 0,51×0,51, l0/h = 15.

7.35

1,0×0,51 , 100 - 50, -1 4 μ = 0,3%, l0/h = 10.

7.36

0,51 × 0,51 100 λh = 10. -1 4 , 50 × 10-2 , .

7.37

70 × 10-2 0,51 × 0,51 l0/h = 10 M 150 100 -1 5 μ = 0,2%?

7.38

1,5 × 10-2 2,0 × 0,51 (b/h) , 25?

7.1 -

7.1 X = 0.1
7.2 h0 = 0,43
7.3 Zb = 0.396
7.4 A s = 8 2 (8 × 10-4 2)
7.5 A s = 5.83 2 (5.83×10-4 2)
7.6 M = 0.13 ͷ
7.7 M2/M1 = 1.124
7.8 M2/M1 = 1.76
7.9 M2/M1 = 2.0
7.10 M2/M1 = 1.217
7.11 A s = 11 2 (11×10-42)
7.12 , .. Ns = 0.365 > Nf = 0.261
7.13 , Mf = 0.17 > M
7.14 A s = 22.1 2 (22.1 × 10-4 2)
7.15 M = 0.2 ͷ
7.16 σsp,1 = 720 , σsp,2 = 590
7.17 σsp,1 = 640 , σsp,2 = 500
7.18 P = 0,9 < N = 1.43 ,
7.19 P = 0.57 < N = 1.43 ,
7.20 Ncrc = 0.67
7.21 Ncrc = 0.984 > N = 0.95 ,
. 7.1
7.22 σsp,2 = 640.5 .
7.23 A = 0.05 2
7.24 σsp,2 + σs = 700 < 0.8 Rs,ser = 784 , σs = 1.26 > 0.5 , ,
7.25 Mrp = 0.498
7.26 Mcrc = 52.5
7.27 M = 0.69 > Mcrc = 0.532 , ,
7.28 Mcrc = 0.107 > M = 0.1 ,
7.29 M = 0.043
7.30 Rb ≥ 14.29 , 25 (Rb = 14.5 )
7.31 Nmax = 0.34 < 0.6
7.32 Rb ≥ 15 , 30 (Rb = 17 )
7.33 N = 0.318
7.34 N = 0.35
7.35 N = 0.676
7.36 μ = 0.17 %
7.37 Nmax =0.67 < N = 0.7 ,
7.38 Mmax = 0.014 < M = 0.015 ,

 


 

1

1 -

15 20 25 30 35 40 45
Rb, 8,5 11,5 14,5 17,0 19,0 22,0 25,0
Rbt, 0,75 0,9 1,05 1,20 1,30 1,40 1,45
E,              

 

2 - ,

 
() Es
Rs Rsw Rsc
A-I          
A-II          
A-III 6-8          
A-III 10-40          
A-IV, -IV, -IVc     450*    
A-V, -V, -Vc     500*    
A-VI, -VI, -     500*    
A-III          

 

1, . 2

 
() Es
Rs Rsw Rsc
A-III          

* Rsc , , [1, . 15, . 2] (γb2 = 0.9); , [1, .15, . 2], Rsc = 400 -(γb2 ≥ 1).

3 -

, 2,
                   
  0.071 0.14 0.21 0.28 0.35 0.42 0.49 0.57 0.64 0.71
  0.126 0.25 0.38 0.50 0.63 0.76 0.88 1.01 1.13 1.26
  0.196 0.39 0.59 0.79 0.98 1.18 1.37 1.57 1.77 1.96
  0.283 0.57 0.85 1.13 1.42 1.70 1.98 2.26 2.55 2.83
  0.385 0.77 1.15 1.54 1.92 2.31 2.69 3.08 2.46 3.85
  0.503 1.01 1.51 2.01 2.51 3.02 3.52 4.02 4.53 5.03
  0.636 1.91 1.91 2.54 3.18 3.82 4.45 5.09 5.72 6.36
  0.785 1.57 2.36 3.14 3.93 4.71 5.5 6.28 7.07 7.86
  1.131 3.39 3.39 4.52 5.65 6.79 7.92 9.05 10.28 11.31
  1.539 3.08 4.62 6.16 7.69 9.23 10.77 12.31 13.85 15.39
  2.011 4.02 6.03 8.04 10.05 12.06 14.07 16.08 18.10 20.11
  2.545 5.09 7.63 10.18 12.72 15.27 17.81 20.36 22.9 25.45
  3.142 6.28 9.41 12.56 15.71 18.83 21.99 25.14 28.28 31.42
  3.801 7.6 11.4 15.2 19.0 22.81 26.61 30.41 34.21 38.01
  4.909 9.82 14.73 19.63 24.54 29.45 34.36 39.27 44.13 49.09
  6.158 12.32 18.44 24.53 30.79 36.95 43.1 49.26 55.42 61.58
  10.18 20.36 30.54 40.72 50.9 61.08 71.26 81.44 91.62 101.8
  12.56 25.12 37.68 50.24 62.8 75.36 87.92 100.48 113.04 125.6

 

 

3

, /
A-I A-II -III -V -IV A-V -V -VI B-I, -1
0.055
0.098
0.154
0.222
0.302
0.055
0.395
0.499
0.617
0.888
1.208
1.578
1.998
2.466
2.984
3.853
4.834
7.99
9.87

 

4 -

γb2 - ω, ξR αR
B 12.5 15 20 25 30 35 40 45
0,9 A-I ξR 0.708 0.700 0.675 0.651 0.631 0.612 0.593 0.570
αR 0.457 0.455 0.447 0.439 0.432 0.425 0.417 0.407
A-II ξR 0.689 0.681 0.656 0.632 0.612 0.592 0.573 0.550
αR 0.452 0.449 0.441 0.432 0.425 0.417 0.409 0.399
A-III -1 ξR 0.664 0.655 0.630 0.605 0.585 0.565 0.546 0.523
αR 0.444 0.441 0.432 0.422 0.414 0.405 0.397 0.386
A-IV ξR 0.621 0.612 0.586 0.561 0.541 0.521 0.502 0.479
αR 0.428 0.425 0.414 0.404 0.395 0.385 0.376 0.364
A-V ξR 0.579 0.570 0.544 0.518 0.498 0.479 0.460 0.437
αR 0.411 0.407 0.396 0.384 0.374 0.364 0.354 0.342
1,0 ω 0.790 0.782 0.758 0.734 0.714 0.694 0.674 0.650
A-I ξR 0.682 0.673 0.645 0.618 0.596 0.575 0.553 0.528
αR 0.449 0.446 0.437 0.427 0.419 0.410 0.400 0.389
A-II ξR 0.660 0.650 0.623 0.595 0.573 0.552 0.530 0.505
αR 0.442 0.439 0.429 0.418 0.409 0.399 0.390 0.378
A-III -1 ξR 0.630 0.621 0.592 0.565 0.543 0.521 0.500 0.475
αR 0.432 0.428 0.417 0.405 0.395 0.385 0.375 0.362
A-IV ξR 0.581 0.571 0.543 0.515 0.493 0.472 0.451 0.427
αR 0.412 0.408 0.395 0.383 0.372 0.361 0.349 0.336
                   
A-V ξR 0.534 0.524 0.496 0.469 0.447 0.426 0.406 0.383
αR, 0.391 0.387 0.373 0.359 0.347 0.336 0.324 0.310
1,1 ω 0.784 0.775 0.749 0.722 0.700 0.678 0.656 0.630
A-I ξR 0.675 0.665 0.635 0.605 0.582 0.558 0.535 0.508
αR 0.447 0.444 0.433 0.422 0.412 0.402 0.392 0.379
A-II ξR 0.653 0.642 0.612 0.582 0.558 0.535 0.512 0.485
αR 0.440 0.436 0.425 0.413 0.402 0.392 0.381 0.367
A-III Bp-I ξR 0.623 0.612 0.582 0.552 0.528 0.504 0.482 0.455
αR 0.429 0.425 0.412 0.400 0.389 0.377 0.366 0.352
A-IV ξR 0.574 0.567 0.532 0.502 0.479 0.456 0.434 0.408
αR 0.409 0.406 0.391 0.376 0.364 0.352 0.340 0.325
A-V ξR 0.527 0.516 0.485 0.456 0.433 0.411 0.389 0.365
αR 0.388 0.383 0.368 0.352 0.339 0.326 0.314 0.298

2

⇐ 12345678


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