nugas
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nugasTRANSCRIPT
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Dasar Perencanaan a Bentuk rangka kuda-kuda b Jarak antar kuda-kuda 5 mc 25d Bahan Gording Baja profil lip channels in front to front arrangemente Bahan rangka kuda-kuda Baja profil double siku sama kakif Bahan penutup atap Genteng g Alat sambung Baut murh Jarak antar gording 1.03 mi Bentuk atap Limasanj Mutu baja profil BJ-50
fy 500 Mpafu 290 Mpa
1933 Kg/cm
Perencanaan Gordinga Berat Gording 46.16 Kg/m tsb Ix 274 cm2 tbc Iy 167 cm4 Zxd h 300 mm Zye b 100 mm
25Jarak antar gording (s) 1.03 mJarak antar kuda-kuda 5 m
Pembebanan berdasarkan SNI 03-1727-1989a Berat Penutup atap 50 Kg/m2b Beban angin 25 Kg/m2c Berat hidup (Pekerja) 100 Kg
Kemiringan (α)
Tegangan dasar (σ)
Kemiringan atap (α)
15.0000
3.4993
8.2800
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d Berat Plafond 18 Kg/m2
Perhitungan Pembebanan
a Beban MatiBerat gording 46.16Berat plafond 36Berat Penutup atap 51.5
q 133.66qx 56.48716qy 121.1371Mx1 378.5534My1 176.5224
b Beban HidupP di ambil sebesar 100 KgPx 42.26183Py 90.63078Mx2 113.2885My2 52.82728
c Beban AnginBeban angin kondisi normal, minimum 25 kg/m2.Koefisien kemiringan atap (a) 25
1 Koefisien angin tekan = (0,02a – 0,4) 0.12 Koefisien angin hisap = – 0,4 – 0,4
Beban Angin1 Angin tekan (W1) = koef. Angin tekan × beban angin × ½ × (s1+s2)
2.575 Kg/m2 Angin hisap (W2) = koef. Angin hisap × beban angin × ½ × (s1+s2)
-10.3000Beban yang bekerja pada sumbu x, maka hanya ada harga Mx :
8.046875-32.1875
Kombinasi Pembebanan1,4D (6.2-1)1,2D + 1,6 L + 0,5 (La atau H) (6.2-2)1,2D + 1,6 (La atau H) + (γ L L atau 0,8W) (6.2-3)1,2D + 1,3 W + γ L L + 0,5 (La atau H) (6.2-4)1,2D ± 1,0E + γ L L (6.2-5)0,9D ± (1,3W atau 1,0E) (6.2-6)
Momen Beban Angin KombinasiTekan Hisap Minimum
Mx 378.5534 113.2885 8.046875 -32.1875 298.8543
Mx (Tekan)Mx (Hisap)
Beban Mati
Beban Hidup
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My 176.5224 52.82728 211.8268Kombinasi gaya dalam pada gording
Kontrol terhadap tegangan maksimumcek tekanan momen lentur yg terjadiMx 635.5257 Kgm 6355.257 KgcmMy 296.3505 Kgm 2963.505 KgcmAsumsikan penampang kompakMnx 2728491Mny 345616.7cek tekanan momen lentur yg terjadiф 0.90.012115 ≤ 1 0k!!!
Kontrol terhadap tegangan minimumcek tekanan momen lentur yg terjadiMx 635.5257 Kgm 6355.257 KgcmMy 211.8268 Kgm 2118.268 KgcmAsumsikan penampang kompakMnx 2728491Mny 345616.7cek tekanan momen lentur yg terjadiф 0.90.009398 ≤ 1 0k!!!
Kontrol Terhadap lendutanDicoba profil 300 x 100E 2100000 Kg/cm2 qxIx 274 cm2 qyIy 167 cm4 Px
PyZijin 2.083333 cm
Zx 0.314345 Zx2 0.098813 Zx+Zy 0.267623Zy 0.410865 Zy2 0.16881
Z 0.517323Z ≤ Zijin Ok!!!
jadi dimensi 300 x 100 aman dan mampu menerima beban apabiladigunakan untuk gording.
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Perencanaan Kuda-kuda
No. Panjang (m)1 12 13 14 15 16 17 18 19 1
10 111 112 113 114 115 116 1.0317 1.0318 1.0319 1.0320 1.0321 1.0322 1.0323 1.0324 1.0325 1.0326 1.0327 1.03
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28 1.0329 1.0330 1.0331 1.0332 0.440333 0.880734 1.32135 1.761436 2.201737 2.642138 3.082439 3.535440 3.093641 2.6842 2.276543 1.889644 1.531745 1.228746 0.440347 1.228748 1.531749 1.889650 2.276551 2.6852 3.093653 3.535454 3.082455 2.642156 2.201757 1.761458 1.32159 0.8807
Perhitungan pembebanan kuda-kuda
data pembebananBerat gording 46.16jarak antar kuda2 5Berat penutup atap 50Berat profil
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
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14 15
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3132
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Beban Mati1 Beban P1=P17
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
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14 15
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30
3132
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Baja profil lip channels in front to front arrangementBaja profil double siku sama kaki
5096.839959 Kg/cm22956.167176 Kg/cm3
1933 Kg/cm PPBBI 1984
535.3367.81
15.0000
3.4993
8.2800
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Angin tekan (W1) = koef. Angin tekan × beban angin × ½ × (s1+s2)
Angin hisap (W2) = koef. Angin hisap × beban angin × ½ × (s1+s2) 277,942 86,603 23,090 -46,180 360,099 450,150160,470 50 - - 272,564 272,564
Mx My529.9748073 247.1313
635.525678 296.3505460.7016206 428.51412464.7250581 412.42037454.2641206 211.8268351.1590279 298.85434-330.2371529 382.54184 ??????
KombinasiMaksimum
635.525678
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296.3504906
56.48715686 Kg/cm121.1370988 Kg/cm42.26182617 Kg
90.6307787 Kg
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kelangsingan kurang dari 300jarak max gording untuk penutup atap genting = 1.2 m
14.1666671.1333333
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P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
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P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
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