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Sambungan Tie Joint To Rafter

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0% found this document useful (0 votes)
23 views3 pages

Sambungan Tie Joint To Rafter

ss
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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KONTROL SAMB.

BALOK TIE BEAM DENGAN BALOK RAFTER

Sambungan balok WF 350 dengan balok HC 525

M = 123482,6109 kgcm (dari ETABS)


P = 917,73 kg
Dipakai 6 D19
WF 350

410x200x16

Baut D19

WF 525

Perhitungan Kekuatan Las


- Tebal plat 1,6 cm -b 17,5 cm
- ts 0,7 cm -h 35 cm
- tb 1,1 cm a 0

Tebal las badan = 1/2 x sqrt(2) x 1,1 = 0,78 cm


Tebal las sayab = 1/2 x sqrt(2) x 0,7 = 0,49 cm

s5
0,7
s4 s4

33,6
s3 s3

s2 s2 0,7
s1
17,5

Moment Inersia
las terhadap las bagian bawah
- 2 x 0,49 x 17,5 x 18,53^2 = 5948,41 cm4
- 4 x 0,49 x 6,64 x 16,47^2 = 3568,49 cm4
- 2 x 0,78 x 32,61^3 : 12 = 4495,5295 cm4
Ix = 14012,43 cm4
Luas Penampang Las
- 2 x 0,49 x 17,5 = 17,32 cm2
- 4 x 0,49 x 6,64 = 13,16 cm2
- 2 x 0,78 x 32,61 = 50,73 cm2
F = 81,21 cm2
Moment Tahanan
Wx = 14012,43 = 766,64 cm3
18,28

Kontrol Tegangan
M = 123483 kgcm Bj. 33/37/41/44/50//52 ? 37
W = 766,64 cm3 s (ijin) 1600 kg/cm2
P = 918 kg
F = 81,21 cm2

sm = 123.483 / 766,64
= 161,07 kg/cm2

tm = 918 / 81,21
= 11,30 kg/cm2

si = sqrt( 161,07^2 + 3 x 11,30^2 )


= 162,26 kg/cm2 < 1600kg/cm2 ( OK )

Perhitungan Kekuatan Baut


Data-data
M = 123482,6109 kg/m h = 35 cm
P = 917,73 kg D = 1,9 cm
Dipakai 3 D19 n = 3
s = (35 - 2 x 2 x 1,9)
Moment Inersia (3 - 1)
- h dihitung dari jarak alat sambung pertama (h0) = 13,7 cm
diameter alat sambung (d) 1,9 cm
h h^2 h1 13,7
h1 13,7 cm 187,69 cm2
h2 27,4 cm 750,76 cm2
htot = 41,1 cm A= 938,45 cm2

F = 1/4 x 3.14 x 1,9^2 = 2,83 cm2


Ix = 2 x 2,83 x 938,45 = 5318,8531 cm4

Moment tahanan
Wx = 5319 = 194,12 cm3
27,4

Kontrol tegangan sambungan baut


D (H) 584,50 kg Bj. 33/37/41/44/50//52 ? 37
P (V) 811,45 kg s (ijin) 1600 kg/cm2
M 1.573,00 kgm Wx 194,12 cm3
Dipakai 3 D19

sa = 0,7 x 1600 = 1120 kg/cm2


t (ijin) = 0,6 x 1600 = 960 kg/cm2
s = 811,45 = 95,45 kg/cm2 < 1120 kg/cm2 (OK)
1/4 x 3.14 x 1,9^2 x 3
sm = 1573 x 100 = 810,33 kg/cm2
194,12
t = 585 = 34,38 kg/cm2 < 960 kg/cm2 (OK)
2 x 1/4 x 3.14 x 1,9^2 x 3

Tegangan Idiil
si = sqrt(810,33^2 + 3 x 34,38^2)
= 812,51 kg/cm2 < 1600 kg/cm2 (OK)

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