commit to user
Tugas Akhir Perencanaan St rukt ur Anggaran Biaya Gedung K uliah 2 L ant ai
162
BAB 5 Plat L ant ai
Dipakai tulangan
∅ 10 – 150 mm
Cek kapasitas lentur :
a = b
c f
fy As
ada
. .
85 ,
. =
1000 .
30 .
85 ,
240 .
471 = 4,43 mm
M
n
= As
ada
.fy.d-a2 = 471.240 95-4,432
= 10,488.10
6
Nmm Mn ada Mn
10,488.10
6
Nmm 9,287.10
6
Nmm → OK ☺
5.6. Penulangan tumpuan arah y
Mu = 743,14 kgm = 7,43.10
6
Nmm
Mn = φ
Mu =
= 8
, 10
. 43
, 7
6
9,287.10
6
Nmm Rn
= =
2
.dx b
Mn =
2 6
95 .
1000 10
. 287
, 9
1,03 Nmm
2
m = 412
, 9
30 .
85 ,
240 .
85 ,
= =
c f
fy
ρ
perlu
= ⎟
⎟ ⎠
⎞ ⎜
⎜ ⎝
⎛ −
− fy
Rn .
m 2
1 1
. m
1
= . 412
, 9
1 ⎟⎟
⎠ ⎞
⎜⎜ ⎝
⎛ −
− 240
03 ,
1 .
412 ,
9 .
2 1
1 = 0,0044
ρ ρ
max
ρ ρ
min
, di pakai ρ
perlu
= 0,0044 As
perlu
= ρ
perlu
. b . dx = 0,0044 . 1000 . 95
= 418 mm
2
Digunakan tulangan ∅ 10
commit to user
Tugas Akhir Perencanaan St rukt ur Anggaran Biaya Gedung K uliah 2 L ant ai
163
BAB 5 Plat L ant ai
As = ¼ . π . 10
2
= 78,5
mm
2
Jumlah tulangan, n =
Astul Asperlu
= 5
, 78
418 = 5,3 ~ 6
Jarak tulangan, S =
n b
= 6
1000 =
166,67 mm
As ada = 6. ¼ .
π . 10
2
= As
ada
As
perlu
= 471 mm
2
418 mm
2
…..… OK ☺ Dipakai tulangan
∅ 10 – 150 mm
Cek kapasitas lentur :
a = b
c f
fy As
ada
. .
85 ,
. =
1000 .
30 .
85 ,
240 .
471 = 4,43 mm
M
n
= As
ada
.fy.d-a2 = 471 . 240 95-4,432
= 10,488.10
6
Nmm Mn
ada
Mn → 10,488.10
6
9,287.10
6
Nmm → OK ☺
5.7. Penulangan lapangan arah x
Mu = 442,13 kgm = 4,42.10
6
Nmm Mn =
φ Mu
=
6 6
10 .
525 ,
5 8
, 10
. 42
, 4
= Nmm
Rn =
=
2
.dx b
Mn =
2 6
95 .
1000 10
. 525
, 5
0,61 Nmm
2
commit to user
Tugas Akhir Perencanaan St rukt ur Anggaran Biaya Gedung K uliah 2 L ant ai
164
BAB 5 Plat L ant ai
m = 412
, 9
30 .
85 ,
240 .
85 ,
= =
c f
fy
ρ
perlu
= ⎟⎟
⎠ ⎞
⎜⎜ ⎝
⎛ −
− fy
Rn .
m 2
1 1
. m
1
= ⎟⎟
⎠ ⎞
⎜⎜ ⎝
⎛ −
− 240
61 ,
. 412
, 9
. 2
1 1
. 412
, 9
1 =
0,0026 ρ ρ
max
ρ ρ
min
, di pakai ρ
perlu
= 0,0026 As
perlu
= ρ
perlu
. b . dx = 0,0026. 1000 . 95
= 247
mm
2
Digunakan tulangan ∅ 10
As = ¼ .
π . 10
2
= 78,5
mm
2
Jumlah tulangan , n = As
perlu As
= 5
, 78
247 = 3,15 ~ 4
Jarak tulangan, S = n
b =
4 1000
= 200 mm Jarak maksimum = 2 x h
= 2 x 120 =
240 mm
As ada = 4. ¼ .
π . 10
2
= 314
mm
2
As 247 mm
2
…...............OK ☺ Dipakai tulangan
∅ 10 – 200 mm
commit to user
Tugas Akhir Perencanaan St rukt ur Anggaran Biaya Gedung K uliah 2 L ant ai
165
BAB 5 Plat L ant ai
Cek kapasitas lentur :
a = b
c f
fy As
ada
. .
85 ,
. =
1000 .
30 .
85 ,
240 .
314 = 2,96mm
M
n
= As
ada
.fy.d-a2 = 314.240 95-2,962
= 7,048.10
6
Nmm Mn ada Mn = 7,048.10
6
6
10 .
525 ,
5 → OK ☺
5.8. Penulangan lapangan arah y
