TÍNH THEÙP CHO DAÀM

5.5.1.Tính cốt dọc:

-Kích thước tiết diện : h x b mm.

Chọn a=5 cm => h0 = h-a A = n 02

M R xbxh

 

0.5x 1 1 2xA

   

Fa = R * *h0 M

a  chọn thép => Fachon 0.05% <  % = * 0

chon

Fa

b h <  max=

0 n

a

xR R



=

0.58 130 2600 100%

x x

=2.9%

NỘI LỰC DẦM NHỊP-DE

Frame Frame OutputCase CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP DE_T1 3.750 BAO Combination Max 6.631 14.166 30.605 NHIP DE_T1 5.625 BAO Combination Max 6.631 20.928 11.413 NHIP DE_T1 0.000 BAO Combination Min 1.942 -26.401 -44.601 NHIP DE_T1 7.500 BAO Combination Min 1.942 15.691 -48.284 NHIP DE_T2 3.750 BAO Combination Max -2.483 15.046 30.944 NHIP DE_T2 5.625 BAO Combination Max -2.483 21.880 14.150 NHIP DE_T2 0.000 BAO Combination Min -5.182 -27.959 -51.046 NHIP DE_T2 7.500 BAO Combination Min -5.182 14.020 -51.449

Trang 64

Frame Frame OutputCase CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP DE_T3 3.750 BAO Combination Max 0.206 15.700 33.008 NHIP DE_T3 5.625 BAO Combination Max 0.206 22.462 16.355 NHIP DE_T3 0.000 BAO Combination Min -2.334 -28.618 -52.702 NHIP DE_T3 7.500 BAO Combination Min -2.334 13.281 -51.710 NHIP DE_T4 3.750 BAO Combination Max 4.546 14.085 32.988 NHIP DE_T4 0.000 BAO Combination Min 3.075 -27.807 -49.230 NHIP DE_T4 1.875 BAO Combination Min 3.075 -21.045 -4.623 NHIP DE_T4 7.500 BAO Combination Min 3.075 14.256 -45.912 NHIP DE_T5 3.750 BAO Combination Max 1.280 12.515 31.958 NHIP DE_T5 0.000 BAO Combination Min -0.693 -27.335 -47.722 NHIP DE_T5 1.875 BAO Combination Min -0.693 -20.573 -3.590 NHIP DE_T5 7.500 BAO Combination Min -0.693 14.968 -40.828 NHIP DE_T6 3.750 BAO Combination Max -0.618 12.055 32.942 NHIP DE_T6 0.000 BAO Combination Min -3.271 -26.826 -45.012 NHIP DE_T6 1.875 BAO Combination Min -3.271 -20.065 -2.040 NHIP DE_T6 7.500 BAO Combination Min -3.271 15.503 -38.368 NHIP DE_T7 3.750 BAO Combination Max 1.369 11.849 34.089 NHIP DE_T7 0.000 BAO Combination Min -0.533 -26.253 -41.760 NHIP DE_T7 1.875 BAO Combination Min -0.533 -19.492 -0.178 NHIP DE_T7 7.500 BAO Combination Min -0.533 16.051 -36.288 NHIP DE_T8 3.750 BAO Combination Max 1.432 10.994 33.909 NHIP DE_T8 0.000 BAO Combination Min -0.596 -26.038 -41.019 NHIP DE_T8 1.875 BAO Combination Min -0.596 -19.276 0.197 NHIP DE_T8 7.500 BAO Combination Min -0.596 16.311 -33.631 NHIP DE_T9 3.750 BAO Combination Max -1.136 10.917 35.095 NHIP DE_T9 0.000 BAO Combination Min -3.886 -25.298 -36.989 NHIP DE_T9 1.875 BAO Combination Min -3.886 -18.536 2.517 NHIP DE_T9 7.500 BAO Combination Min -3.886 16.976 -32.056 NHIP DE_T10 3.750 BAO Combination Max 1.153 10.731 36.651 NHIP DE_T10 0.000 BAO Combination Min -0.850 -24.369 -31.974 NHIP DE_T10 1.875 BAO Combination Min -0.850 -17.607 5.383 NHIP DE_T10 7.500 BAO Combination Min -0.850 17.870 -30.190 NHIP DE_T11 3.750 BAO Combination Max 2.370 10.087 36.128 NHIP DE_T11 0.000 BAO Combination Min 0.050 -24.176 -31.315 NHIP DE_T11 1.875 BAO Combination Min 0.050 -17.346 5.577 NHIP DE_T11 7.500 BAO Combination Min 0.050 18.116 -28.326

Trang 65

Frame Frame OutputCase CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP DE_T12 3.750 BAO Combination Max -7.737 11.588 40.881 NHIP DE_T12 5.625 BAO Combination Max -7.737 18.499 14.243 NHIP DE_T12 0.000 BAO Combination Min -10.924 -22.435 -18.508 NHIP DE_T12 7.500 BAO Combination Min -10.924 20.016 -29.335

THEÙP DAÀM NHÒP –DE Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

m



R



As

(mm2)

chọn theùp

Aschọn (mm2)

à (%) 1 DE Nhòp 0.35 0.75 0.68 306.046 0.038 0.038 1638.81

22

+220 1768 0.743 Goái

trái 0.35 0.75 0.66 446.006 0.330 0.416 3048.22

25

+228 3194 1.383 Goái

phải 0.35 0.75 0.66 482.844 0.357 0.465 3404.72

28

+225 3442 1.490 2 DE Nhòp 0.35 0.75 0.68 309.441 0.038 0.039 1657.36

22

+220 1768 0.743 Goái

trái 0.35 0.75 0.66 510.459 0.377 0.505 3694.89

625

+222 3706 1.604 Goái

phải 0.35 0.75 0.66 514.488 0.380 0.511 3739.19

625

+222 3706 1.604 3 DE Nhòp 0.35 0.75 0.68 330.084 0.041 0.041 1770.31

22

+220 1768 0.743 Goái

trái 0.35 0.75 0.66 527.021 0.390 0.530 3880.65 25 3928 1.700 Goái

phải 0.35 0.75 0.66 517.100 0.382 0.515 3768.21

625

+222 3706 1.604 4 DE Nhòp 0.35 0.75 0.68 329.884 0.041 0.041 1769.21

22

+220 1768 0.743 Goái 0.35 0.75 0.66 492.297 0.364 0.478 3501.57 28+225 3442 1.490

Trang 66 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

m



R



As

(mm2)

chọn theùp

Aschọn (mm2)

à (%) trái

Goái

phải 0.35 0.75 0.66 459.122 0.339 0.433 3171.64

25

+228 3194 1.383 5 DE Nhòp 0.35 0.75 0.68 319.585 0.039 0.040 1712.82

22

+220 1768 0.743 Goái

trái 0.35 0.75 0.66 477.221 0.353 0.457 3348.23

28

+225 3442 1.490 Goái

phải 0.35 0.75 0.66 408.285 0.302 0.371 2711.67

25

+222 2724 1.179 6 DE Nhòp 0.35 0.75 0.68 329.418 0.040 0.041 1766.66

22

+220 1768 0.743 Goái

trái 0.35 0.75 0.66 450.124 0.333 0.422 3086.58

25

+228 3194 1.383 Goái

phải 0.35 0.75 0.66 383.683 0.284 0.342 2504.83

325

+322 2617 1.133 7 DE Nhòp 0.35 0.75 0.68 340.887 0.042 0.043 1829.54 425 1964 0.825

Goái

trái 0.35 0.75 0.66 417.600 0.309 0.382 2792.46 25 2945 1.275 Goái

phải 0.35 0.75 0.66 362.879 0.268 0.319 2336.62 525 2455 1.063 8 DE Nhòp 0.35 0.75 0.68 339.095 0.042 0.043 1819.71 425 1964 0.825

Goái

trái 0.35 0.75 0.66 410.190 0.303 0.373 2728.08

425

+222 2724 1.179 Goái

phải 0.35 0.75 0.66 336.310 0.249 0.291 2129.72

25

+222 2233 0.967 9 DE Nhòp 0.35 0.75 0.68 350.947 0.043 0.044 1884.78 425 1964 0.825

Goái

trái 0.35 0.75 0.66 369.889 0.273 0.327 2392.66 525 2455 1.063 Goái

phải 0.35 0.75 0.66 320.559 0.237 0.275 2010.87 425 1964 0.850 10 DE Nhòp 0.35 0.75 0.68 366.510 0.045 0.046 1970.38 425 1964 0.825

Goái

trái 0.35 0.75 0.66 319.738 0.236 0.274 2004.75 425 1964 0.850 Goái 0.35 0.75 0.66 301.899 0.223 0.256 1873.42 425 1964 0.850

Trang 67 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

m



R



As

(mm2)

chọn theùp

Aschọn (mm2)

à (%) phải

11 DE Nhòp 0.35 0.75 0.68 285.726 0.035 0.036 1527.98 422 1520 0.639 Goái

trái 0.35 0.75 0.66 364.234 0.269 0.321 2347.41 525 2455 1.063 Goái

phải 0.35 0.75 0.66 346.919 0.256 0.302 2211.33 525 2455 1.063 12 DE Nhòp 0.35 0.75 0.68 408.814 0.050 0.052 2203.97

25

+222 2233 0.938 Goái

trái 0.35 0.75 0.66 185.077 0.137 0.148 1081.39 420 1256 0.544 Goái

phải 0.35 0.75 0.66 293.352 0.217 0.248 1811.61 425 1964 0.850

NỘI LỰC DẦM NHỊP-CD

Frame Station OutputCase CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP CD_T1 4.10 BAO Combination Max 2.599 4.797 12.186 NHIP CD_T1 0.00 BAO Combination Min 1.885 -16.869 -34.288 NHIP CD_T1 1.82 BAO Combination Min 1.885 -11.939 -8.061 NHIP CD_T1 8.20 BAO Combination Min 1.885 8.303 -31.591 NHIP CD_T2 4.10 BAO Combination Max -1.635 5.979 12.607 NHIP CD_T2 0.00 BAO Combination Min -1.943 -17.661 -37.324 NHIP CD_T2 1.82 BAO Combination Min -1.943 -12.731 -9.789 NHIP CD_T2 8.20 BAO Combination Min -1.943 7.411 -36.092 NHIP CD_T3 4.10 BAO Combination Max -0.360 6.281 12.592 NHIP CD_T3 0.00 BAO Combination Min -0.632 -17.973 -38.850 NHIP CD_T3 1.82 BAO Combination Min -0.632 -13.043 -10.854 NHIP CD_T3 8.20 BAO Combination Min -0.632 7.099 -37.383 NHIP CD_T4 4.10 BAO Combination Max 3.400 5.752 12.868 NHIP CD_T4 0.00 BAO Combination Min 2.588 -17.112 -35.115 NHIP CD_T4 1.82 BAO Combination Min 2.588 -12.182 -8.708 NHIP CD_T4 8.20 BAO Combination Min 2.588 8.010 -34.936 NHIP CD_T5 4.10 BAO Combination Max 0.750 5.402 13.151

Trang 68

Frame Station OutputCase CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP CD_T5 0.00 BAO Combination Min 0.424 -16.292 -31.424 NHIP CD_T5 1.82 BAO Combination Min 0.424 -11.362 -6.501 NHIP CD_T5 8.20 BAO Combination Min 0.424 8.869 -33.230 NHIP CD_T6 4.10 BAO Combination Max -1.234 4.986 13.194 NHIP CD_T6 0.00 BAO Combination Min -1.563 -15.922 -29.951 NHIP CD_T6 1.82 BAO Combination Min -1.563 -10.992 -5.736 NHIP CD_T6 8.20 BAO Combination Min -1.563 9.278 -31.499 NHIP CD_T7 4.10 BAO Combination Max 0.671 4.639 13.267 NHIP CD_T7 0.00 BAO Combination Min 0.322 -15.623 -28.787 NHIP CD_T7 1.82 BAO Combination Min 0.322 -10.693 -5.181 NHIP CD_T7 8.20 BAO Combination Min 0.322 9.572 -30.041 NHIP CD_T8 4.10 BAO Combination Max 0.645 4.453 13.538 NHIP CD_T8 0.00 BAO Combination Min 0.292 -15.184 -26.752 NHIP CD_T8 1.82 BAO Combination Min 0.292 -10.254 -3.956 NHIP CD_T8 8.20 BAO Combination Min 0.292 10.023 -29.008 NHIP CD_T9 4.10 BAO Combination Max -1.832 4.078 13.540 NHIP CD_T9 0.00 BAO Combination Min -2.213 -14.948 -25.897 NHIP CD_T9 1.82 BAO Combination Min -2.213 -10.018 -3.582 NHIP CD_T9 8.20 BAO Combination Min -2.213 10.236 -27.504 NHIP CD_T10 4.10 BAO Combination Max 0.413 3.562 13.498 NHIP CD_T10 0.00 BAO Combination Min 0.092 -14.683 -24.990 NHIP CD_T10 1.82 BAO Combination Min 0.092 -9.753 -3.229 NHIP CD_T10 8.20 BAO Combination Min 0.092 10.512 -25.458 NHIP CD_T11 4.10 BAO Combination Max 0.884 3.456 13.879 NHIP CD_T11 0.00 BAO Combination Min 0.472 -14.297 -23.080 NHIP CD_T11 1.82 BAO Combination Min 0.472 -9.366 -2.029 NHIP CD_T11 8.20 BAO Combination Min 0.472 10.873 -24.667 NHIP CD_T12 4.10 BAO Combination Max -6.372 2.593 12.905 NHIP CD_T12 0.00 BAO Combination Min -7.553 -14.557 -25.399 NHIP CD_T12 1.82 BAO Combination Min -7.553 -9.626 -4.012 NHIP CD_T12 8.20 BAO Combination Min -7.553 10.624 -22.097

THEÙP DAÀM NHÒP –CD

Trang 69 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

αm R As

(mm2)

chọn theùp

Aschọn (mm2)

à (%) 1 CD Nhòp 0.35 0.75 0.68 121.858 0.015 0.015 644.88 318 763 0.32

Goái

trái 0.35 0.75 0.67 342.878 0.246 0.287 2134.25

220

+422 2148 0.91

Goái

phải 0.35 0.75 0.67 315.904 0.227 0.261 1936.22

220

+422 2148 0.91 2 CD Nhòp 0.35 0.75 0.68 126.070 0.015 0.016 667.35 318 763 0.32

Goái

trái 0.35 0.75 0.67 373.241 0.268 0.319 2366.41 525 2454 1.04

Goái

phải 0.35 0.75 0.67 360.914 0.259 0.306 2270.90 525 2454 1.04 3 CD Nhòp 0.35 0.75 0.68 125.922 0.015 0.016 666.56 318 763 0.32

Goái

trái 0.35 0.75 0.67 388.498 0.279 0.335 2487.19

225

+422 2502 1.06

Goái

phải 0.35 0.75 0.67 373.824 0.268 0.319 2370.98

225

+422 2502 1.06 4 CD Nhòp 0.35 0.75 0.68 128.682 0.016 0.016 681.29 318 763 0.32

Goái

trái 0.35 0.75 0.67 351.149 0.252 0.296 2196.47

220

+422 2148 0.91

Goái

phải 0.35 0.75 0.67 349.355 0.251 0.294 2182.91

220

+422 2148 0.91 5 CD Nhòp 0.35 0.75 0.68 131.510 0.016 0.016 696.38 318 763 0.32

Goái

trái 0.35 0.75 0.67 314.235 0.225 0.259 1924.20

220

+422 2148 0.91

Goái

phải 0.35 0.75 0.67 332.295 0.238 0.277 2055.68

220

+422 2148 0.91 6 CD Nhòp 0.35 0.75 0.68 131.939 0.016 0.016 698.67 318 763 0.32

Goái

trái 0.35 0.75 0.67 299.508 0.215 0.245 1819.26 22 1900 0.81

Goái

phải 0.35 0.75 0.67 314.992 0.226 0.260 1929.65 22 1900 0.81 7 CD Nhòp 0.35 0.75 0.68 132.674 0.016 0.016 702.60 318 763 0.32

Goái

trái 0.35 0.75 0.67 287.865 0.207 0.234 1737.67

220

+322 1768 0.75 Goái 0.35 0.75 0.67 300.413 0.216 0.246 1825.65 220 1768 0.75

Trang 70 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

αm R As

(mm2)

chọn theùp

Aschọn (mm2)

à (%)

phải +322

8 CD Nhòp 0.35 0.75 0.68 135.377 0.017 0.017 717.03 318 763 0.32

Goái

trái 0.35 0.75 0.67 267.517 0.192 0.215 1597.81

220

+322 1768 0.75

Goái

phải 0.35 0.75 0.67 290.077 0.208 0.236 1753.08

220

+322 1768 0.75 9 CD Nhòp 0.35 0.75 0.68 135.400 0.017 0.017 717.16 318 763 0.32

Goái

trái 0.35 0.75 0.67 258.971 0.186 0.207 1540.06

220

+322 1768 0.75

Goái

phải 0.35 0.75 0.67 275.036 0.197 0.222 1649.09

220

+322 1768 0.75 10 CD Nhòp 0.35 0.75 0.68 134.978 0.017 0.017 714.90 318 763 0.32

Goái

trái 0.35 0.75 0.67 249.899 0.179 0.199 1479.37 22 1520 0.64

Goái

phải 0.35 0.75 0.67 254.576 0.183 0.203 1510.58 22 1520 0.64 11 CD Nhòp 0.35 0.75 0.68 138.789 0.017 0.017 735.26 318 763 0.32

Goái

trái 0.35 0.75 0.67 230.801 0.166 0.182 1353.58 22 1520 0.64

Goái

phải 0.35 0.75 0.67 246.670 0.177 0.196 1457.91 22 1520 0.64 12 CD Nhòp 0.35 0.75 0.68 129.051 0.016 0.016 683.25 318 763 0.32

Goái

trái 0.35 0.75 0.67 253.990 0.182 0.203 1506.66 22 1520 0.64

Goái

phải 0.35 0.75 0.67 220.965 0.159 0.174 1289.81

220

+222 1388 0.59

NỘI LỰC DẦM NHỊP-BC

Frame Station

OutputCas

e CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP BC_T1 3.75 BAO Combination Max 3.492 5.328 11.535

Trang 71 Frame Station

OutputCas

e CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP BC_T1 0.00 BAO Combination Min 0.356 -16.223 -30.633 NHIP BC_T1 1.88 BAO Combination Min 0.356 -11.144 -4.944 NHIP BC_T1 7.50 BAO Combination Min 0.356 6.681 -29.022 NHIP BC_T2 3.75 BAO Combination Max -1.023 6.899 11.809 NHIP BC_T2 0.00 BAO Combination Min -2.503 -17.228 -34.274 NHIP BC_T2 1.88 BAO Combination Min -2.503 -12.150 -6.883 NHIP BC_T2 7.50 BAO Combination Min -2.503 5.542 -35.358 NHIP BC_T3 3.75 BAO Combination Max -0.081 4.506 12.864 NHIP BC_T3 0.00 BAO Combination Min -0.946 -17.850 -35.686 NHIP BC_T3 1.88 BAO Combination Min -0.946 -12.771 -7.080 NHIP BC_T3 7.50 BAO Combination Min -0.946 4.893 -38.345 NHIP BC_T4 3.75 BAO Combination Max 2.503 3.384 12.623 NHIP BC_T4 5.63 BAO Combination Max 2.503 11.572 13.097 NHIP BC_T4 0.00 BAO Combination Min 1.420 -16.468 -30.780 NHIP BC_T4 7.50 BAO Combination Min 1.420 6.387 -33.809 NHIP BC_T5 3.75 BAO Combination Max 0.514 2.494 11.936 NHIP BC_T5 5.63 BAO Combination Max 0.514 10.832 9.520 NHIP BC_T5 0.00 BAO Combination Min -0.085 -15.051 -26.143 NHIP BC_T5 7.50 BAO Combination Min -0.085 7.914 -30.508 NHIP BC_T6 3.75 BAO Combination Max -0.486 1.953 12.267 NHIP BC_T6 5.63 BAO Combination Max -0.486 10.324 8.986 NHIP BC_T6 0.00 BAO Combination Min -1.446 -14.647 -24.341 NHIP BC_T6 7.50 BAO Combination Min -1.446 8.361 -28.483 NHIP BC_T7 3.75 BAO Combination Max 0.408 1.358 12.642 NHIP BC_T7 5.63 BAO Combination Max 0.408 9.800 8.550 NHIP BC_T7 0.00 BAO Combination Min 0.135 -14.358 -22.994 NHIP BC_T7 7.50 BAO Combination Min 0.135 8.756 -26.132 NHIP BC_T8 3.75 BAO Combination Max 0.417 0.954 12.352 NHIP BC_T8 5.63 BAO Combination Max 0.417 9.432 6.956 NHIP BC_T8 0.00 BAO Combination Min 0.100 -13.663 -20.679 NHIP BC_T8 7.50 BAO Combination Min 0.100 9.461 -24.853 NHIP BC_T9 1.88 BAO Combination Max -0.900 -4.423 6.887 NHIP BC_T9 3.75 BAO Combination Max -0.900 3.732 12.698 NHIP BC_T9 0.00 BAO Combination Min -1.683 -13.456 -19.671 NHIP BC_T9 7.50 BAO Combination Min -1.683 9.787 -21.973

Trang 72 Frame Station

OutputCas

e CaseType StepType P V2 M3

Text m Text Text Text Ton Ton Ton-m

NHIP BC_T10 3.75 BAO Combination Max 0.265 -0.441 13.114 NHIP BC_T10 0.00 BAO Combination Min -0.031 -13.191 -18.314 NHIP BC_T10 1.88 BAO Combination Min -0.031 -8.113 1.569 NHIP BC_T10 7.50 BAO Combination Min -0.031 10.050 -18.535 NHIP BC_T11 3.75 BAO Combination Max 0.881 -0.780 12.630 NHIP BC_T11 5.63 BAO Combination Max 0.881 7.669 4.968 NHIP BC_T11 0.00 BAO Combination Min 0.539 -12.570 -16.603 NHIP BC_T11 7.50 BAO Combination Min 0.539 10.681 -17.200 NHIP BC_T12 3.75 BAO Combination Max -4.570 1.187 14.461 NHIP BC_T12 0.00 BAO Combination Min -5.582 -13.355 -18.021 NHIP BC_T12 1.88 BAO Combination Min -5.582 -8.243 1.891 NHIP BC_T12 7.50 BAO Combination Min -5.582 10.018 -9.561

THEÙP DAÀM NHÒP – BC Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

αm R As

(mm2)

Chọn

Aschọn (mm2)

à (%) 1 BC Nhòp 0.4 0.75 0.68 115.353 0.014 0.014 610.20 318 763 0.32

Goái

trái 0.4 0.75 0.67 306.332 0.220 0.251 1867.64 522 1900 0.81

Goái

phải 0.4 0.75 0.67 290.216 0.208 0.236 1754.04 522 1900 0.81 2 BC Nhòp 0.4 0.75 0.68 118.087 0.015 0.015 624.77 318 763 0.32

Goái

trái 0.4 0.75 0.67 342.742 0.246 0.287 2133.22 22 2280 0.97

Goái

phải 0.4 0.75 0.67 353.582 0.254 0.298 2214.91 22 2280 0.97 3 BC Nhòp 0.4 0.75 0.68 128.641 0.016 0.016 681.06 318 763 0.32 Goái 0.4 0.75 0.67 356.855 0.256 0.301 2239.83 22 2280 0.97

Trang 73 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

αm R As

(mm2)

Chọn

Aschọn (mm2)

à (%) trái

Goái

phải 0.4 0.75 0.67 383.452 0.275 0.329 2446.92

422

+225 2502 1.07 4 BC Nhòp 0.4 0.75 0.68 126.233 0.016 0.016 668.21 318 763 0.32

Goái

trái 0.4 0.75 0.67 307.799 0.221 0.253 1878.09 522 1900 0.81

Goái

phải 0.4 0.75 0.67 338.094 0.243 0.282 2098.59 22 2280 0.97 5 BC Nhòp 0.4 0.75 0.68 119.362 0.015 0.015 631.57 318 763 0.32

Goái

trái 0.4 0.75 0.67 261.431 0.188 0.210 1556.62 422 1520 0.65

Goái

phải 0.4 0.75 0.67 305.075 0.219 0.250 1858.69 522 1900 0.81 6 BC Nhòp 0.4 0.75 0.68 122.671 0.015 0.015 649.21 318 763 0.32

Goái

trái 0.4 0.75 0.67 243.409 0.175 0.193 1436.33 422 1520 0.65

Goái

phải 0.4 0.75 0.67 284.834 0.204 0.231 1716.61

325

+222 1768 0.75 7 BC Nhòp 0.4 0.75 0.68 126.423 0.016 0.016 669.23 318 763 0.32

Goái

trái 0.4 0.75 0.67 229.936 0.165 0.181 1347.95 422 1520 0.65

Goái

phải 0.4 0.75 0.67 261.318 0.187 0.209 1555.85 422 1520 0.65 8 BC Nhòp 0.4 0.75 0.68 123.523 0.015 0.015 653.76 318 763 0.32

Goái

trái 0.4 0.75 0.67 206.794 0.148 0.161 1199.07 325 1473 0.63

Goái

phải 0.4 0.75 0.67 248.526 0.178 0.198 1470.23 325 1473 0.63 9 BC Nhòp 0.4 0.75 0.68 126.984 0.016 0.016 672.22 318 763 0.32

Goái

trái 0.4 0.75 0.67 196.710 0.141 0.153 1135.30 20 1256 0.54

Goái

phải 0.4 0.75 0.67 219.727 0.158 0.173 1281.83 20 1256 0.54 10 BC Nhòp 0.4 0.75 0.68 131.145 0.016 0.016 694.43 318 763 0.32

Trang 74 Taàng Daàm Tieát

Dieọn b (m)

h (m)

ho

(m) M (KNm)

αm R As

(mm2)

Chọn

Aschọn (mm2)

à (%)

Goái

trái 0.4 0.75 0.67 183.139 0.131 0.141 1050.48 418 1018 0.43

Goái

phải 0.4 0.75 0.67 185.354 0.133 0.143 1064.25 418 1018 0.43 11 BC Nhòp 0.4 0.75 0.68 126.298 0.016 0.016 668.56 318 763 0.32

Goái

trái 0.4 0.75 0.67 166.032 0.119 0.127 945.15 418 1018 0.43

Goái

phải 0.4 0.75 0.67 172.000 0.123 0.132 981.70 418 1018 0.43 12 BC Nhòp 0.4 0.75 0.68 144.613 0.018 0.018 766.40 318 763 0.32

Goái

trái 0.4 0.75 0.67 180.206 0.129 0.139 1032.30

220

+218 1137 0.49

Goái

phải 0.4 0.75 0.67 95.612 0.069 0.071 528.45 318 763 0.33 5.5.2.Tớnh coỏt ủai:

Đối với nhịp 6 m : Qmax = 11.76 T , h0 = 50-5 = 45 cm k1Rkbh0 = 0,6x10x20x45 = 5400 (kG) k0Rnbh0 = 0,35x130x20x45 = 40950 (kG)

So sánh k1Rkbh0 < Q <k0Rnbh0  thỏa điều kiện tính toán cốt ngang.

Lực cốt đai phải chịu qủ = 02

2

8R bh Q

k =

2 2

11760

8 10 20 45   = 42.7 kG/cm

Chọn đai þ8, fđ = 0.503 cm2, hai nhánh n = 2, thép CII có Rađ = 1700 kG/cm2 Khoảng cách tính toán

Utt = d

d ad

q nf R

= 1700 2 0.503 42.7

  = 40 cm

Umax = Q bh Rk 02 5 , 1

=

1, 5 10 20 452

11760

  

= 51.7 cm

Uct = min (2 h

, 15)cm

Trang 75

 U = min (Utt, Umax, Uct )

Chọn U = 150 cm, bố trí đoạn 1/4 từ gối ra, đoạn 2/4 giữa dầm chọn U = 30cm, thoó điều kiện nhỏ hơn (ắ)h = (ắ)50 = 37.5 cm và 50cm

*Kieồm tra ủieàu kieọn coỏt xieõn:

Qủb = 2,8h0 Rkqdb

Với: Rk = 10 kG/cm2 qủ = d

d ad

u nf R

= 1700 2 0.503 10

  = 171 kg/cm

Khả năng chịu cắt của bê tông và cốt đai trên tiết diện nghiêng nguy hiểm nhất là:

Qủb = 2,8x45x 10 171 20  = 23302.8 kG Qủb > Q

Vậy bê tông và cốt đai đủ khả năng chịu lực vì thế không cần tính cốt xiên.