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Dosen:
Hadianti Muhdinar Pasaribu, ST, MT
Beberapa Faktor Koreksi:
• Faktor Bentuk  Shape Factor Fs
• Faktor Inklinasi Beban  Inclination Factor Fi
• Faktor Kedalaman  Depth Factor Fd
qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng
Beberapa Faktor Koreksi:
• Faktor Bentuk  Shape Factor Fs
• Faktor Inklinasi Beban  Inclination Factor Fi
• Faktor Kedalaman  Depth Factor Fd
qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng
b
Tall Pier Large Lateral Forces and Moment
Beberapa Faktor Koreksi:
• Faktor Bentuk  Shape Factor Fs
• Faktor Inklinasi Beban  Inclination Factor Fi
• Faktor Kedalaman  Depth Factor Fd
qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng
Beberapa Faktor Koreksi:
• Faktor Bentuk  Shape Factor Fs
• Faktor Inklinasi Beban  Inclination Factor Fi
• Faktor Kedalaman  Depth Factor Fd
qult = (C Nc) + (q Nq) + (0.5 g B Ng)
Fc Fq Fg
Fcs Fci Fcd Fqs Fqi Fqd Fgs Fgi Fgd
General Bearing Capacity Equation
Shape factors:
Inclination factors:
Depth
factors:
qmax =
BL
Q
+
L
B
M
6
2
qmin =
BL
Q
-
L
B
M
6
2
Qmax =
 )
e
2
B
L
3
Q
4

qmax = 






B
e
BL
Q 6
1
qmin = 






B
e
BL
Q 6
1
e=
M
Q
Dimensi untuk Perhitungan Pondasi
Eksentrisitas 1 dimensi (One-Way Eccentricity)
B’= B – 2e
L’ = L
Apabila eksentrisitas dalam arah L,
maka:
L’ = L – 2e
(Meyerhoff, 1953)
Perhitungan daya dukung:
Eksentrisitas 1 dimensi (One-Way Eccentricity)
i
d
s
qi
qd
qs
q
ci
cd
cs
c
u F
F
F
N
B
F
F
F
qN
F
F
F
N
c
q g
g
g
g
g '
2
1
' 


Tetap menggunakan B sebagai dasar
perhitungan
Eksentrisitas 2 Arah (Two-way Eccentricity)
'
'
A
q
Q u
ult 
i
d
s
qi
qd
qs
q
ci
cd
cs
c
u F
F
F
N
B
F
F
F
qN
F
F
F
N
c
q g
g
g
g
g '
2
1
'
'



'
'
' L
B
A 
Tetap menggunakan B sebagai dasar perhitungan
ult
x
L
Q
M
e 
ult
y
B
Q
M
e 
Eksentrisitas 2 Arah (Two-way Eccentricity)
Case 1:
6
1
dan
6
1


B
e
L
e B
L
Luas efektif untuk kondisi ini:
1
1
2
1
' L
B
A 








B
e
B
B B
3
5
.
1
1








L
e
L
L L
3
5
.
1
1
L’ panjang yang terbesar dari B1 dan L1.
'
'
'
L
A
B 
Highter dan Anders (1985)
Eksentrisitas 2 Arah (Two-way Eccentricity)
Case 2:
6
1
0
dan
5
.
0 


B
e
L
e B
L
Luas efektif untuk kondisi ini:
 )B
L
L
A 2
1
2
1
' 

panjang)
paling
yg
pilih
(
'
'
2
1 L
atau
L
A
B 
panjang)
paling
yg
pilih
(
' 2
1 L
atau
L
L 
Eksentrisitas 2 Arah (Two-way Eccentricity)
Case 3:
5
.
0
0
dan
6
1



B
e
L
e B
L
Luas efektif untuk kondisi ini:
 )L
B
B
A 2
1
2
1
' 

L
A
B
'
'
L
L 
'
Eksentrisitas 2 Arah (Two-way Eccentricity)
Case 4:
6
1
0
dan
6
1



B
e
L
e B
L
Luas efektif untuk kondisi ini:
 ) )
2
2
2
2
1
' L
L
B
B
B
L
A 



L
A
B
'
'
L
L 
'
Eksentrisitas 2 Arah (Two-way Eccentricity)
Case 5:
Foundation
Circular
Luas efektif untuk kondisi ini:
'
'
'
B
A
L 
CONTOH SOAL AKAN DIBAHAS
DI PERTEMUAN BERIKUTNYA
THANK YOU

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Faktor Koreksi Pondasi

  • 2.
  • 3. Beberapa Faktor Koreksi: • Faktor Bentuk  Shape Factor Fs • Faktor Inklinasi Beban  Inclination Factor Fi • Faktor Kedalaman  Depth Factor Fd qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng
  • 4.
  • 5.
  • 6. Beberapa Faktor Koreksi: • Faktor Bentuk  Shape Factor Fs • Faktor Inklinasi Beban  Inclination Factor Fi • Faktor Kedalaman  Depth Factor Fd qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng b
  • 7. Tall Pier Large Lateral Forces and Moment
  • 8. Beberapa Faktor Koreksi: • Faktor Bentuk  Shape Factor Fs • Faktor Inklinasi Beban  Inclination Factor Fi • Faktor Kedalaman  Depth Factor Fd qult = Fc C Nc + Fq q Nq + Fg 0.5 g B Ng
  • 9. Beberapa Faktor Koreksi: • Faktor Bentuk  Shape Factor Fs • Faktor Inklinasi Beban  Inclination Factor Fi • Faktor Kedalaman  Depth Factor Fd qult = (C Nc) + (q Nq) + (0.5 g B Ng) Fc Fq Fg Fcs Fci Fcd Fqs Fqi Fqd Fgs Fgi Fgd
  • 12.
  • 13. qmax = BL Q + L B M 6 2 qmin = BL Q - L B M 6 2 Qmax =  ) e 2 B L 3 Q 4  qmax =        B e BL Q 6 1 qmin =        B e BL Q 6 1 e= M Q
  • 14. Dimensi untuk Perhitungan Pondasi Eksentrisitas 1 dimensi (One-Way Eccentricity) B’= B – 2e L’ = L Apabila eksentrisitas dalam arah L, maka: L’ = L – 2e (Meyerhoff, 1953)
  • 15. Perhitungan daya dukung: Eksentrisitas 1 dimensi (One-Way Eccentricity) i d s qi qd qs q ci cd cs c u F F F N B F F F qN F F F N c q g g g g g ' 2 1 '    Tetap menggunakan B sebagai dasar perhitungan
  • 16. Eksentrisitas 2 Arah (Two-way Eccentricity) ' ' A q Q u ult  i d s qi qd qs q ci cd cs c u F F F N B F F F qN F F F N c q g g g g g ' 2 1 ' '    ' ' ' L B A  Tetap menggunakan B sebagai dasar perhitungan ult x L Q M e  ult y B Q M e 
  • 17. Eksentrisitas 2 Arah (Two-way Eccentricity) Case 1: 6 1 dan 6 1   B e L e B L Luas efektif untuk kondisi ini: 1 1 2 1 ' L B A          B e B B B 3 5 . 1 1         L e L L L 3 5 . 1 1 L’ panjang yang terbesar dari B1 dan L1. ' ' ' L A B  Highter dan Anders (1985)
  • 18. Eksentrisitas 2 Arah (Two-way Eccentricity) Case 2: 6 1 0 dan 5 . 0    B e L e B L Luas efektif untuk kondisi ini:  )B L L A 2 1 2 1 '   panjang) paling yg pilih ( ' ' 2 1 L atau L A B  panjang) paling yg pilih ( ' 2 1 L atau L L 
  • 19. Eksentrisitas 2 Arah (Two-way Eccentricity) Case 3: 5 . 0 0 dan 6 1    B e L e B L Luas efektif untuk kondisi ini:  )L B B A 2 1 2 1 '   L A B ' ' L L  '
  • 20. Eksentrisitas 2 Arah (Two-way Eccentricity) Case 4: 6 1 0 dan 6 1    B e L e B L Luas efektif untuk kondisi ini:  ) ) 2 2 2 2 1 ' L L B B B L A     L A B ' ' L L  '
  • 21. Eksentrisitas 2 Arah (Two-way Eccentricity) Case 5: Foundation Circular Luas efektif untuk kondisi ini: ' ' ' B A L 
  • 22. CONTOH SOAL AKAN DIBAHAS DI PERTEMUAN BERIKUTNYA