Atap Dynabolt

5/27/2018 Atap Dynabolt

1/7

Perhitungan base plate

150

100

150

81.3 237.5 81.3

318.7

400

Mutakterduga= 34083 kgNu = 3789.6 kg

Hu = 1365.1 kg

f'c = 35 Mpa = 250 kg/cm

B = 400 mm = 40 cm

H = 400 mm = 40 cmd = 250 mm

b = 125 mm

0,95d = 237.5 mm

0,8b = 100 mm

x= 81.3 mm = 8.13 cm

y = 150 mm = 15 cm

n Baut = 3

BJ 37 => fy = 240 Mpa = 2400 kg/cm

fu = 370 Mpa = 3700 kg/cm

1. Ukuran B x H

2.3685 kg/cm

2. Tebal pelat

0.70245 cm 0.8 cm

BxH

Nucf'

bfyHB

yNut

...

..2 2

1


2/7

3. Baut angker (dipakai DYNABOLT)

Momen tak terduga dari pemasangan = 34083 kg

tension

34083 143.51

318.7

geser = Hu / jumlah baut geser

= 227.52

dipakai dynabolt 3 M16 48 mm

ket. dyna bolt

9

25.4

Sambungan di A 22.8

Dicoba tebal pelat 0.7 mm & baut 0.5 inchi 250 22.822.8

Mu = 68256 kg baut = A3250 22.8

Vu = 1365.1 kg fub = 8250 25.4

Nu = 3789.6 kg 9

3d = 38.1

d = 12.7 59.5 59.5di pakai baut1/2" --> mutu AST 320 dgn jmlh baut 16 pasang

= 12.70

22.53d = 38.1 cm 59.5 cm

y2 = 79.8

y1= 11.4

6

=

T


3/7

Fut =

=

= 2514.69 kg/cm2

FuQ = VU 1365.1

baut 16

= 85.31875 kg/cm2

Fuv = 85.31875

1/4 1.27

= 67.39 kg/cm2

FuQ f. r1. fub. n .ab. m85.31875 63870.8

>baut yang memikul gaya tarik dan geser

Fut = 2514.69 ft (f1 - r2 FuY) r2 = 1.9

Abaut =1/4 1.27 f1 = 8070 kg/cm2

= 1986.13 ft = 7942 f2 = 6210 kg/cm2

= okeee.!

> baut yang memikul gaya tarik murni

Fut f. d2

2514.69 7834.15772 kg/cm2

okeeh!

Perhitungan las bas plate

Nu = 1230 kg

Hu = 922.38 kg

f'c = 25 Mpa = 250 kg/cm

B = 400 mm = 40 cm

H = 400 mm = 40 cm

BJ 37 => fy = 240 Mpa = 2400 kg/cm

fu = 370 Mpa = 3700 kg/cm

d = 250 mm = 25 cm

bf = 125 mm = 12.5 cm

tw = 6 mm = 0.6 cm

tf = 9 mm = 0.9 cm

t pelat = 10 mm = 1 cm

t diambil yang paling kecil = 6 mm

4.242 mm = 0.4242 cm

41.91096 cm

Sy = statis momen terhadap sumbu y

Sy = 203.38269 cm

22.008 kg/cm

14.674 kg/cm

26.45148604 kg/cm

(tegangan max pada las)

Dipakai elektroda E60

Syarat

fr 790.86 kg/cm (elektroda)

0,75.t.0,6.fu = 999 kg/cm (baja)

Sambungan Okeh!!!

Perhitungan las di sambungan A

ttt .707,0

20.26,0.215.443,0.panjanglastA tlas

1,9.5,0.42,0.1,9.255,9.42,0.9,0.21.1,9.42,0.6,0150,10.42,0.15Sy

911,41

38,922'

lasA

Huxf

911,41

1230'

lasA

Nuyf

2222

348.29008,22'' yfxffr

uwt ft .6,0..75,0

2

)(4

max

Yi

sMUxY

22

)875.7()125.1(4

875.7)2.1(_68256

x


4/7

Mu = 68256

Nu = 3789.6 kg

Vuy = 1365.1

BJ 37 => fy = 240 Mpa = 2400 kg/cm

fu = 370 Mpa = 3700 kg/cm

d = 250 mm = 25 cmbf = 125 mm = 12.5 cm

tw = 6 mm = 0.6 cm

tf = 9 mm = 0.9 cm



4.242 mm = 0.4242 cm

41.911 cm

F'p = Pu = (1365.1 x 1.2) = 39.09

Alas

F'N = Nu = 3789.6 = 90.420

A 41.911

> Menghitung tebal las diambil satu-satuan tebal

y1 = 11.6

Sy = statis momen terhadap sumbu y y2 = 10.7

sx = b tt y1 + (b-tw).tt.y2 + 2 tt y2 1/2 y2

sx = 12.5 x 0.424 x 11.6 + (12.5-0.6)x(2x0.424x10.7x1/2x10.7) 250

Sx = 164.1 cm

249.5816 kg/cm 9

302.50 kg/cm


Dipakai elektroda E60 = 4143 kg

Syarat


0,75.t.0,6.fu = 999 kg/cm (baja)

Mu = 2870 kg

Sambungan Okeh!!! Vu = 110.1 kg

Nu = 785.5 kg

9

25.4

22.5Dicoba tebal pelat 0.7 mm & baut 0.5 inchi 250 22.5

22.5

Mu = 2869.9 kg baut = A3250 22.5

Vu = 110.1 kg fub = 8250 25.4

Nu = 785.53 kg 9

3d = 38.1

d = 12.7 59.5 59.5

di pakai baut1/2" --> mutu AST 320 dgn jmlh baut 16 pasang

= 12.70

22.53d = 38.1 cm 59.5 cm

y2 = 78.75

y1= 11.25

Fut =

=

41.911

125

Sambungan di B

6

ttt .707,0

25.26,0.25,12.443,0___.panjanglastA tlas

uwt ft .6,0..75,0

22222 42,9009.39669.249)'()''( Nfyfxffr

012,1642

2.168256

2'

sx

Muyf

2

)(4

max

Yi

sMUxY

22

)875.7()125.1(4

875.7)2.1(_9.2869

x


5/7

= 107.14 kg/cm2

FuQ = VU 110.1

baut 16

= 6.88125 kg/cm2

Fuv = 6.88125

1/4 1.27

= 5.43 kg/cm2

FuQ f. r1. fub. n .ab. m6.88125 63870.8


Fut = 107.14 ft (f1 - r2 FuY) r2 = 1.9

Abaut =1/4 1.27 f1 = 8070 kg/cm2

= 84.62 ft = 8059.7 f2 = 6210 kg/cm2

= okeee.!


Fut f. d2

107.14 7834.15772 kg/cm2

okeeh!

Perhitungan las di sambungan B

Mu = 2869.9

Nu = 785.53 kg

Vuy = 110.1

BJ 37 => fy = 240 Mpa = 2400 kg/cm

fu = 370 Mpa = 3700 kg/cm

d = 250 mm = 25 cm

bf = 125 mm = 12.5 cm

tw = 6 mm = 0.6 cm

tf = 9 mm = 0.9 cm



4.242 mm = 0.4242 cm

41.911 cm

F'p = Pu = (110.1 x 1.2) = 3.15

Alas

F'N = Nu = 785.53 = 18.743

A 41.911


y1 = 11.6



sx = 12.5 x 0.424 x 11.6 + (12.5-0.6)x(2x0.424x10.7x1/2x10.7) 250

Sx = 164.1 cm

10.49 kg/cm 9

23.18 kg/cm



Syarat


0,75.t.0,6.fu = 999 kg/cm (baja)

Mu = 2870 kg


Nu = 785.5 kg

Dicoba tebal pelat 0.7 mm & baut 0.5 inchi 250 22.8

22.8

41.911

125

ttt .707,0


uwt ft .6,0..75,0

22222 42,9049.1015.3)'()''( Nfyfxffr

012,1642

2.19.2869

2'

sx

Muyf


6/7

Mu = 20.55 kg baut = A3250 22.8

Vu = 1365.1 kg fub = 8250 25.4

Nu = 3789.6 kg 9

3d = 38.1

d = 12.7 59.5 59.5

di pakai baut1/2" --> mutu AST 320 dgn jmlh baut 16 pasang = 12.70

22.53d = 38.1 cm 59.5 cm

y2 = 79.8

y1= 11.4

Fut =

=

= 0.76 kg/cm2

FuQ = VU 1365.1

baut 16

= 85.31875 kg/cm2

Fuv = 85.31875

1/4 1.27

= 67.39 kg/cm2

FuQ f. r1. fub. n .ab. m85.31875 63870.8


Fut = 0.76 ft (f1 - r2 FuY) r2 = 1.9

Abaut =1/4 1.27 f1 = 8070 kg/cm2

= 0.60 ft = 7942 f2 = 6210 kg/cm2

= okeee.!


Fut f. d2

0.76 7834.15772 kg/cm2

okeeh!

Perhitungan las di sambungan A'

Mu = 34128

Nu = 1894.8 kg

Vuy = 682.55

BJ 37 => fy = 240 Mpa = 2400 kg/cm

fu = 370 Mpa = 3700 kg/cm

d = 250 mm = 25 cm

bf = 125 mm = 12.5 cm

tw = 6 mm = 0.6 cm

tf = 9 mm = 0.9 cm



4.242 mm = 0.4242 cm

41.911 cm

F'p = Pu = (1894.8 x 1.2) = 19.54

Alas 41.911

F'N = Nu = 1894.8 = 45.210

A 41.911

125


y1 = 11.6


6

ttt .707,0

2

)(4

max

Yi

sMUxY

22

)875.7()125.1(4

875.7)2.1(_68256

x


7/7


sx = 12.5 x 0.424 x 11.6 + (12.5-0.6)x(2x0.424x10.7x1/2x10.7) 250

Sx = 164.1 cm

124.7908 kg/cm 9

151.25 kg/cm



Syarat


0,75.t.0,6.fu = 999 kg/cm (baja)

Mu = 2870 kg


Nu = 785.5 kg


uwt ft .6,0..75,0

012,1642

2.134128

2

'

sx

Muyf

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Atap Dynabolt