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3 GEDUNG 2 SORE
IVAN KRISTIANTO
SATRIAN FAJAR
YASMIN SABILA
BAJA 2
BASE PLATE
CONTOH 1
Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR
kedalam BETON
CONTOH 2
Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR
kedalam BETON
CONTOH 3
Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR
kedalam BETON
CONTOH 3
Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR
kedalam BETON
F’c
BJ - 41
IWF 250 x 125
KETERANGAN GAMBAR
• B = 350 mm
• N = 350 mm
Menggunakan,
BJ – 41
F’c = 30 Mpa
F’c
BJ - 41
IWF 250 x 125
tp = 10 mm
PEMBEBANAN
• DEAD LOAD
Berat sendiri kolom,
29.6 kg/m x 5 = 148 kg
Berat Sendiri penyangga,
Double Angel
39.88 kg/m x 2 = 79.76 kg/m
PEMBEBANAN
• WIND ( ISAP )
BI angin = 25 kg/m²
Lebar plat = 125 mm
= 0.125 m
Maka.
qWI = 25 x 0.125
= 3. 13 kg/m
PEMBEBANAN
• WIND ( TEKAN )
BI angin = 25 kg/m²
Lebar plat = 125 mm
= 0.125 m
Maka.
qWT = 25 x 0.125
= 3. 13 kg/m
KOMBINASI PEMBEBANAN
KOMBINASI
• COMB 1 : 1.4 DL
• COMB 2 : 1.2 DL + 0.8 W
• COMB 3 : 1.2 DL + 1.3 W + LL
• COMB 4 : 0.9 DL + 1.3 W
HASIL GAYA TERBESAR
• Pu = 9.3302 KN
= 9330.2 N
• Vu = 0.234 KN
= 234 N
• Mu = 14.6521 KN m
= 14652100 N mm
PU – COMB 1
Satuan Kg, m, C
VU – COMB 3
Satuan Kg, m, C
MU – COMB 1
Satuan Kg, m, C
LUASAN
• A1 = Pendestel ( Beton )
= B x N
= 350 x 350
= 122500 mm²
• A2 = Base Plate
= 122500 mm²
350
350
TEGANGAN YANG TERJADI
• Fpp1 = 0.6 x 0.85 x f’c x √(A2/A1)
= 0.6 x 0.85 x 30
= 15.3 Mpa
• Fpp2 = 0.6 x 1.7 x f’c
= 0.6 x 1.7 x 30
= 13.6 Mpa
Diambil yang terkecil,
Fpp = 15.3 Mpa
CEK TEGANGAN
• Fc1 =
𝑃𝑢
𝐵 . 𝑁
+
𝑀𝑢 (
𝑁
2
)
1
12
𝐵 . 𝑁³
=
9930
122500
+
14652100 (
350
2
)
1
12
350 . 350³
= 2.126 Mpa
• Fc2 =
𝑃𝑢
𝐵 . 𝑁
−
𝑀𝑢 (
𝑁
2
)
1
12
𝐵 . 𝑁³
=
9930
122500
−
14652100 (
350
2
)
1
12
350 . 350³
= - 1.947 Mpa
Fpp = 15.3 Mpa
Syarat, Fc1 & Fc2 < Fpp
Memenuhi Syarat ( OK )
CEK TEGANGAN
350
350
Fc1
Fc2
350
DIMENSI m DAN n
• m =
𝑁 −0.95 𝑑
2
=
350 −0.95 (250)
2
= 56.25 mm
• n =
𝐵 −0.8 𝑏𝑓
2
=
350 −0.8 (125)
2
= 125 mm
d = Panjang IWF
bf = Lebar IWF
CEK TEBAL PLAT
• a =
𝐹𝑐1 . 𝑁
𝐹𝑐1+𝐹𝑐2
=
2.126 . 350
2.126+1.947
= 181.5 mm
• Fcx =
𝐹𝑐1 . 𝑎 − 𝐹𝑐1 . 𝑚
𝑎
=
2.126 𝑥 181.5 −2.216 𝑥 56.25
181.5
= 1.4675 Mpa
• Mpl =
𝐹𝑐𝑥 . 𝑚²
2
+
𝐹𝑐1−𝐹𝑐𝑥 . 𝑚²
3
=
1.4675 . 56.25²
2
+
2.126−1.4675 .56.25²
3
= 3016.798 Nmm
• tp min. = √
4 . 𝑀𝑝𝑙
∅ 𝐹𝑦
= √
4 . 3016.798
0.9 250
= 7.328 mm ( MINIMAL )
tp analisis = 10 mm ( OK )
DESIGN ANGKUR
• D angkur = 16 mm
• Jumlah Baut = 4 buah
• Fy = 742 Mpa
• Fu = 825 Mpa
• x1 =
𝑁
2
+
𝑎
3
=
350
2
+
181.5
3
= 114.5 mm
• x2 = N −
𝑚
2
−
𝑎
2
= 350 −
56.25
2
−
181.5
2
= 261.4 mm
CEK KEKUATAN ANGKUR
• Tu =
𝑀𝑢 −( 𝑃𝑢 . 𝑥1 )
𝑥2
=
14652100 −( 9330.2 𝑥 114.5 )
261.4
= 51970.548 N
• Ag = ¼ . 𝜋 . d²
= ¼ . 𝜋 . 16²
= 201.062 mm²
• Ae = 0.75 ¼ . 𝜋 . d² ( ULIR )
= 0.75 ¼ . 𝜋 . 16²
= 150.796 mm²
CEK KEKUATAN ANGKUR
• Tu < ∅b . Ag . Fy . n/2
51970.548 < 0.9 201.062 742 4/2
51970.548 < 268538.31 N
• Tu < ∅v . Ae . Fu . n/2
51970.548 < 0.75 150.796 825 4/2
51970.548 < 186610.60 N
OK OK
MENCARI PANJANG ANGKUR
• Tu < ∅ . 𝜋 . Id . D . Fcl . n/2
Dimana,
• Fcl = √f’c
= √30
= 5.477 Mpa
• Id >
𝑇𝑢
∅ . 𝜋 . 𝐷 . 𝑓𝑐𝑙 . 𝑛/2
>
51970.548
0.75 . 𝜋 . 16 . 5.477 . 4/2
Id > 125.844 mm
CEK KUAT GESER
Syarat,
• Vu < 0.75 Fu Ab n
234 < 0.75 825 201.062 4
234 < 497628 N
Dimana,
Ab = Ag
F’c
BJ - 41Vu = 234 N
OK
CEK INTERAKSI GESER
Syarat,
•
𝑇𝑢 +
𝑉𝑢
𝜂
∅ . 𝑅𝑛
< 1
•
51970.548+
234
0.70
0.75 . 663504.37
< 1
• 0.10443 < 1
F’c
BJ - 41
𝜂 = 0.70
• Rn = 0.75 Fu An n
= 0.75 825 201.062 4
= 663504.37 N
OK

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Baja - Base Plate

  • 1. 3 GEDUNG 2 SORE IVAN KRISTIANTO SATRIAN FAJAR YASMIN SABILA
  • 3. CONTOH 1 Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR kedalam BETON
  • 4. CONTOH 2 Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR kedalam BETON
  • 5. CONTOH 3 Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR kedalam BETON
  • 6. CONTOH 3 Terdapat PLAT yang dijadikan BASE dan disambung menggunakan ANGKUR kedalam BETON F’c BJ - 41 IWF 250 x 125
  • 7. KETERANGAN GAMBAR • B = 350 mm • N = 350 mm Menggunakan, BJ – 41 F’c = 30 Mpa F’c BJ - 41 IWF 250 x 125 tp = 10 mm
  • 8. PEMBEBANAN • DEAD LOAD Berat sendiri kolom, 29.6 kg/m x 5 = 148 kg Berat Sendiri penyangga, Double Angel 39.88 kg/m x 2 = 79.76 kg/m
  • 9. PEMBEBANAN • WIND ( ISAP ) BI angin = 25 kg/m² Lebar plat = 125 mm = 0.125 m Maka. qWI = 25 x 0.125 = 3. 13 kg/m
  • 10. PEMBEBANAN • WIND ( TEKAN ) BI angin = 25 kg/m² Lebar plat = 125 mm = 0.125 m Maka. qWT = 25 x 0.125 = 3. 13 kg/m
  • 11. KOMBINASI PEMBEBANAN KOMBINASI • COMB 1 : 1.4 DL • COMB 2 : 1.2 DL + 0.8 W • COMB 3 : 1.2 DL + 1.3 W + LL • COMB 4 : 0.9 DL + 1.3 W HASIL GAYA TERBESAR • Pu = 9.3302 KN = 9330.2 N • Vu = 0.234 KN = 234 N • Mu = 14.6521 KN m = 14652100 N mm
  • 12. PU – COMB 1 Satuan Kg, m, C
  • 13. VU – COMB 3 Satuan Kg, m, C
  • 14. MU – COMB 1 Satuan Kg, m, C
  • 15. LUASAN • A1 = Pendestel ( Beton ) = B x N = 350 x 350 = 122500 mm² • A2 = Base Plate = 122500 mm² 350 350
  • 16. TEGANGAN YANG TERJADI • Fpp1 = 0.6 x 0.85 x f’c x √(A2/A1) = 0.6 x 0.85 x 30 = 15.3 Mpa • Fpp2 = 0.6 x 1.7 x f’c = 0.6 x 1.7 x 30 = 13.6 Mpa Diambil yang terkecil, Fpp = 15.3 Mpa
  • 17. CEK TEGANGAN • Fc1 = 𝑃𝑢 𝐵 . 𝑁 + 𝑀𝑢 ( 𝑁 2 ) 1 12 𝐵 . 𝑁³ = 9930 122500 + 14652100 ( 350 2 ) 1 12 350 . 350³ = 2.126 Mpa • Fc2 = 𝑃𝑢 𝐵 . 𝑁 − 𝑀𝑢 ( 𝑁 2 ) 1 12 𝐵 . 𝑁³ = 9930 122500 − 14652100 ( 350 2 ) 1 12 350 . 350³ = - 1.947 Mpa Fpp = 15.3 Mpa Syarat, Fc1 & Fc2 < Fpp Memenuhi Syarat ( OK )
  • 19. DIMENSI m DAN n • m = 𝑁 −0.95 𝑑 2 = 350 −0.95 (250) 2 = 56.25 mm • n = 𝐵 −0.8 𝑏𝑓 2 = 350 −0.8 (125) 2 = 125 mm d = Panjang IWF bf = Lebar IWF
  • 20. CEK TEBAL PLAT • a = 𝐹𝑐1 . 𝑁 𝐹𝑐1+𝐹𝑐2 = 2.126 . 350 2.126+1.947 = 181.5 mm • Fcx = 𝐹𝑐1 . 𝑎 − 𝐹𝑐1 . 𝑚 𝑎 = 2.126 𝑥 181.5 −2.216 𝑥 56.25 181.5 = 1.4675 Mpa • Mpl = 𝐹𝑐𝑥 . 𝑚² 2 + 𝐹𝑐1−𝐹𝑐𝑥 . 𝑚² 3 = 1.4675 . 56.25² 2 + 2.126−1.4675 .56.25² 3 = 3016.798 Nmm • tp min. = √ 4 . 𝑀𝑝𝑙 ∅ 𝐹𝑦 = √ 4 . 3016.798 0.9 250 = 7.328 mm ( MINIMAL ) tp analisis = 10 mm ( OK )
  • 21. DESIGN ANGKUR • D angkur = 16 mm • Jumlah Baut = 4 buah • Fy = 742 Mpa • Fu = 825 Mpa • x1 = 𝑁 2 + 𝑎 3 = 350 2 + 181.5 3 = 114.5 mm • x2 = N − 𝑚 2 − 𝑎 2 = 350 − 56.25 2 − 181.5 2 = 261.4 mm
  • 22. CEK KEKUATAN ANGKUR • Tu = 𝑀𝑢 −( 𝑃𝑢 . 𝑥1 ) 𝑥2 = 14652100 −( 9330.2 𝑥 114.5 ) 261.4 = 51970.548 N • Ag = ¼ . 𝜋 . d² = ¼ . 𝜋 . 16² = 201.062 mm² • Ae = 0.75 ¼ . 𝜋 . d² ( ULIR ) = 0.75 ¼ . 𝜋 . 16² = 150.796 mm²
  • 23. CEK KEKUATAN ANGKUR • Tu < ∅b . Ag . Fy . n/2 51970.548 < 0.9 201.062 742 4/2 51970.548 < 268538.31 N • Tu < ∅v . Ae . Fu . n/2 51970.548 < 0.75 150.796 825 4/2 51970.548 < 186610.60 N OK OK
  • 24. MENCARI PANJANG ANGKUR • Tu < ∅ . 𝜋 . Id . D . Fcl . n/2 Dimana, • Fcl = √f’c = √30 = 5.477 Mpa • Id > 𝑇𝑢 ∅ . 𝜋 . 𝐷 . 𝑓𝑐𝑙 . 𝑛/2 > 51970.548 0.75 . 𝜋 . 16 . 5.477 . 4/2 Id > 125.844 mm
  • 25. CEK KUAT GESER Syarat, • Vu < 0.75 Fu Ab n 234 < 0.75 825 201.062 4 234 < 497628 N Dimana, Ab = Ag F’c BJ - 41Vu = 234 N OK
  • 26. CEK INTERAKSI GESER Syarat, • 𝑇𝑢 + 𝑉𝑢 𝜂 ∅ . 𝑅𝑛 < 1 • 51970.548+ 234 0.70 0.75 . 663504.37 < 1 • 0.10443 < 1 F’c BJ - 41 𝜂 = 0.70 • Rn = 0.75 Fu An n = 0.75 825 201.062 4 = 663504.37 N OK