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