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1. Zadatak

Dimenzionisati zategnut tap valjanog ili zavarenog "I" poprenog preseka i konstruisati njegov montani

nastavak prema sledeim projektnim uslovima:

Merodavna sila zatezanja: Z=900,0 kN

Osnovni materijal: 0361

Sluaj optereenja: I

Spojna sredstva: obini zavrtnji klase vrstoe 5.6

1. Osnovni podaci za proraun

Osnovni materijal0361

Zavrtnji klase vrstoe 5.6I sluaj optereenja

Doputen normalni napon (za osnovni materijal): sdop = 160 MPa (JUS U.E7.145,1987)

Doputen smiui napon (za zavrtnje): tv,dop = 140 MPa (JUS U.E7.145/1,1991)

Doputen napon pritiska po omotau rupe (za zavrtnje): sb,dop = 270 MPa (JUS U.E7.145/1,1991)

2. Dimenzionisanje zategnutog tapa

dop

net

t

A

Nss =max

160900 s kN/cm2 0900251A 75 0 cm2

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4. Nastavak noice

Odreivanje prenika zavrtnja:

maxd= 27 mm

Usvajaju se zavrtnjevi M24 .. 5.6

(d=24 mm d0=25 mm)

Kontrola napona u noici

Neto povrina noice:

Af,net= Af- 2d0tf= 30,0 - 22,51,5 = 22,5 cm2

2

.

,

cm

kN15,37

5,22

345,80===

netf

ft

A

Ns 16

2cm

kN

Proraun podvezica

usvaja se irina podvezica bp = 200 mm

neto povrina podvezica: Af,p,net= bptf,p - 2d0tf,p

tfp(20 - 22,5)2, cm61,21

0,16

80,345==

dop

ftN

s

tf,p = 1,44 cm

Usvaja se podvezica 200 x 15 mm

Nosivost jednog zavrtnja

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Predpostavlja se mogui raspored zavrtnjeva na rebru:

Kontrola napona u rebru

Neto povrina rebra: Aw,net = Aw - 3d0tw = 18,08 - 31,30,9 = 14,57 cm2

kN16

kN14 30

40,208wt

Ns

2x40=80

25

25

130

100

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Doputeni naponi za osnovnielini materijal [ ]MPa

I sluaj optereenja II sluaj optereenja

Vrsta napona 0361

0362

0363

0451

0452

0453

0561

0562

0563

0361

0362

0363

0451

0452

0453

0561

0562

0563

yy ff = 667,03

2 yy ff = 75,0

4

3

dops

Pritisak,

savijanje,

zatezanje160 185 240 180 205 265

yy ff = 385,033

2 yy ff = 433,0

34

3

dopt Smicanje

90 105 140 100 120 155

Doputeni naponi za neobraene zavrtnjeve [ ]MPa

I sluaj optereenja II sluaj optereenja

Vrsta elika od kojeg su izraeni elementi koji se spajajuVrstanapona0361

0362

0363

0451

0452

0453

0561

0562

0563

0361

0362

0363

0451

0452

0453

0561

0562

0563

Idops7,1

IIdops7,1 dopb,

s

Pritisak po

omotau

rupe270 315 410 305 350 450

l j

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TABLICA HEB PROFILA

profil profil profil

G h b tw tf r A hi d pmin pmax AL AG Iy Wel.y Wpl.y iy Avz Iz Wel.z Wpl.z iz ss It Iwx10-3

kg/m mm mm mm mm mm cm2

mm mm mm mm m2/m m2/t cm

4cm

3cm

3cm cm

2 cm4 cm3 cm3 cm mm cm4 cm6

HE 100 B 20,4 100 100 6,0 10,0 12 26,04 80 56 M10 56 58 0,567 2 7,760 HE 100 B 449,5 89,91 104,20 4,16 9,04 167,3 33,45 51,42 2,53 40,06 9,25 3,38 HE 100 B

HE 120 B 26,7 120 120 6,5 11,0 12 34,01 98 74 M12 60 68 0,686 2 5,710 HE 120 B 864,4 144,1 165,2 5,04 10,96 317,5 52,92 80,97 3,06 42,56 13,84 9,41 HE 120 B

HE 140 B 33,7 140 140 7,0 12,0 12 42,96 116 92 M16 66 76 0,805 23,880 HE 140 B 1509,0 215,6 245,4 5,93 13,08 549,7 78,52 119,80 3,58 45,06 20,06 22,48 HE 140 B

HE 160 B 42,6 160 160 8,0 13,0 15 54,25 134 104 M20 80 84 0,918 21,560 HE 160 B 2492,0 311,5 354,0 6,78 17,59 889,2 111,2 170,0 4,05 51,57 31,24 47,94 HE 160 B

HE 180 B 51,2 180 180 8,5 14,0 15 65,25 152 122 M24 88 92 1,037 20,250 HE 180 B 3831,0 425,7 481,4 7,66 20,24 1363,0 151,4 231,0 4,57 54,07 42,16 93,75 HE 180 B

HE 200 B 61,3 200 200 9,0 15,0 18 78,08 170 134 M27 100 100 1,151 18,780 H E 200 B 5696,0 569,6 642,5 8,54 24,83 2003,0 200,3 305,8 5,07 60,09 59,28 171,1 HE 200 B

HE 220 B 71,5 220 220 9,5 16,0 18 91,04 188 152 M27 100 118 1,270 17,770 H E 220 B 8091,0 735,5 827,0 9,43 27,92 2843,0 258,5 393,9 5,59 62,59 76,57 295,4 HE 220 B

H E 2 40 B 83 ,2 24 0 2 40 1 0, 0 1 7, 0 21 10 6, 00 20 6 1 64 M2 7 1 08 1 38 1, 384 1 6, 63 0 HE 24 0 B 11 26 0,0 93 8,3 10 53 ,0 10 ,31 3 3, 23 3 92 3 3 26, 9 49 8,4 6, 08 68 ,60 1 02 ,70 48 6, 9 H E 24 0 B

H E 2 60 B 93 ,0 26 0 2 60 1 0, 0 1 7, 5 24 11 8, 40 22 5 1 77 M2 7 1 14 1 58 1, 499 1 6, 12 0 HE 26 0 B 14 92 0,0 11 48 ,0 12 83 ,0 11 ,22 3 7, 59 5 13 5 3 95, 0 60 2, 2 6, 58 73 ,12 1 23 ,80 75 3, 7 H E 26 0 B

H E 2 80 B 1 03 2 80 2 80 10 ,5 1 8, 0 24 1 31 ,4 0 2 44 1 96 M2 7 1 14 1 78 1, 61 8 1 5, 690 H E 28 0 B 19 270, 0 13 76, 0 15 34 1 2, 11 41 ,09 65 95 4 71 ,0 71 7, 6 7, 09 7 4, 62 1 43 ,7 0 1 13 0, 0 H E 2 80 B

H E 3 00 B 1 17 ,0 30 0 30 0 1 1, 0 19 ,0 2 7 14 9, 10 26 2 20 8 M27 1 20 1 98 1, 732 14 ,80 0 HE 3 00 B 25 17 0, 0 16 78 ,0 1 86 9, 0 1 2,9 9 4 7, 43 8 56 3 5 70 ,9 87 0, 1 7, 58 80 ,6 3 1 85 ,0 0 1 68 8 H E 30 0 B

H E 3 20 B 1 27 ,0 32 0 30 0 1 1, 5 20 ,5 2 7 16 1, 30 27 9 22 5 M27 1 22 1 98 1, 771 13 ,98 0 HE 3 20 B 30 82 0, 0 1 92 6 21 49 1 3, 82 51 ,77 92 39 6 15 ,9 93 9, 1 7, 57 8 4, 13 2 25 ,1 0 2 06 9 H E 3 20 B

H E 3 40 B 1 34 3 40 3 00 12 ,0 2 1, 5 27 1 70 ,9 0 2 97 2 43 M2 7 1 22 1 98 1, 81 0 1 3, 490 HE 34 0 B 36 660, 0 21 56 2 40 8 14 ,65 5 6, 09 9 69 0 64 6, 0 9 85 ,7 7 ,5 3 86 ,63 2 57, 20 2 45 4 H E 34 0 B

H E 3 60 B 1 42 3 60 3 00 12 ,5 2 2, 5 27 1 80 ,6 0 3 15 2 61 M2 7 1 22 1 98 1, 84 9 1 3, 040 H E 36 0 B 43 190, 0 24 00 2 68 3 15 ,46 6 0, 60 1 01 40 67 6, 1 10 32 ,0 7 ,4 9 89 ,13 2 92 ,50 2 88 3 H E 36 0 B

H E 4 00 B 1 55 ,0 40 0 30 0 1 3, 5 24 ,0 2 7 19 7, 80 35 2 29 8 M27 1 24 1 98 1, 927 12 ,41 0 HE 4 00 B 57 68 0, 0 2 88 4 32 32 1 7, 08 69 ,98 10 820 7 21 ,3 1 10 4, 0 7, 40 9 3, 13 35 5,7 0 38 17 H E 4 00 B

H E 4 50 B 1 71 4 50 3 00 14 ,0 2 6, 0 27 2 18 ,0 0 3 98 3 44 M2 7 1 24 1 98 2, 02 6 1 1, 840 H E 45 0 B 79 890, 0 35 51 3 98 2 19 ,14 7 9, 66 1 17 20 78 1, 4 11 98 ,0 7 ,3 3 97 ,63 4 40 ,50 5 25 8 H E 45 0 B

H E 5 00 B 1 87 5 00 3 00 14 ,5 2 8, 0 27 2 38 ,6 0 4 44 3 90 M2 7 1 24 1 98 2, 12 5 1 1, 340 H E 50 0 B 10 720 0, 0 42 87 4 81 5 21 ,19 8 9, 82 1 26 20 84 1, 6 12 92 ,0 7, 27 10 2, 10 53 8, 40 70 18 HE 5 00 BH E 5 50 B 1 99 5 50 3 00 15 ,0 2 9, 0 27 2 54 ,1 0 4 92 4 38 M2 7 1 24 1 98 2, 22 4 1 1, 150 H E 55 0 B 13 670 0, 0 49 71 5 59 1 23 ,20 1 00 ,10 13 08 0 8 71 ,8 1 34 1, 0 7 ,17 104 ,6 0 6 00 ,3 0 8 85 6 H E 55 0 B

H E 6 00 B 2 12 6 00 3 00 15 ,5 3 0, 0 27 2 70 ,0 0 5 40 4 86 M2 7 1 26 1 98 2, 32 3 1 0, 960 H E 60 0 B 17 100 0, 0 57 01 6 42 5 25 ,17 1 10 ,80 13 53 0 9 02 ,0 1 39 1, 0 7 ,08 107 ,1 0 6 67 ,2 0 10 970 H E 60 0 B

H E 6 50 B 2 25 6 50 3 00 16 ,0 3 1, 0 27 2 86 ,3 0 5 88 5 34 M2 7 1 26 1 98 2, 42 2 1 0, 770 H E 65 0 B 21 060 0, 0 64 80 7 32 0 27 ,12 1 22 ,00 13 98 0 9 32 ,3 1 44 1, 0 6 ,99 109 ,6 0 7 39 ,2 0 13 360 H E 65 0 B

H E 7 00 B 2 41 7 00 3 00 17 ,0 3 2, 0 27 3 06 ,4 0 6 36 5 82 M2 7 1 26 1 98 2, 52 0 1 0, 480 H E 70 0 B 25 690 0, 0 73 40 8 32 7 28 ,96 1 37 ,10 14 44 0 9 62 ,7 1 49 5, 0 6 ,87 112 ,6 0 8 30 ,9 0 16 060 H E 70 0 B

H E 8 00 B 2 62 8 00 3 00 17 ,5 3 3, 0 30 3 34 ,2 0 7 34 6 74 M2 7 1 34 1 98 2, 71 3 1 0, 340 H E 80 0 B 35 910 0, 0 89 77 1 02 30 32 ,78 1 61, 80 14 90 0 9 93 ,6 1 55 3, 0 6 ,68 118 ,6 0 9 46 ,00 21 840 H E 80 0 B

HE 900 B 291 900 300 18,5 35,0 30 371 ,30 830 770 M27 134 198 2 ,911 9 ,990 HE 900 B 494100,0 10980 12580 36,48 188 ,80 15820 1054,0 1658 ,0 6 ,53 123 ,60 1137,00 29460 HE 900 B

HE 1000 B 314 1000 300 19,0 36,0 30 400 ,00 928 868 M27 134 198 3 ,110 9 ,905 HE 1000 B 644700,0 12890 14860 40,15 212 ,50 16280 1085,0 1716,0 6 ,38 126 ,10 1254 ,00 37640 HE 1000 B

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