Tirta Kencana Perhitungan Struktur

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a

[ Structure And Construction Calculation Plan 2008 ]

1

Rencana Desain Pembangunan RUMAH TINGGAL Nama Pemilik Alamat Lokasi

: Teuku Harmany Boerhan Ali : Jl. Dr. Rubini No. 4 RT. 05 RW. 01 Kel. Pasirkaliki Kec. Cicendo Kota Bandung : Jl. Tirta Kencana II Kav. 74 Kec. Cimahi Utara Kel. Cibabat Kota Cimahi

Luas Tanah Luas Total Bangunan Luas Lantai 1 Luas Lantai 2 Luas Lantai 3 Building Coverage Ratio (BCR)

: 297 m2 : 280 m2 : 116 m2 : 116 m2 : 48 m2 : 40 %

LAMPIRAN GAMBAR RENCANA

2

3

RENCANA PERHITUNGAN STRUKTUR DAN KONSTRUKSI 1. Preliminary Design Elemen Struktur Pendimensian Pelat 5000

3000

Asumsi : Fc’ Fy’

: 30 Mpa : 240 Mpa

a. Menentukan Panjang Bersih  Ly = 5000  Lx = 3000 β

= Ly Lx

= 5000 3000

= 1.6667  Pelat dua arah

b. Menentukan tebal Pelat Berdasarkan RSNI 2002 h

=

Lny

x

h

=

5000 x

h

=

94.117 mm

0.8 + Fy / 1500 36 + 9β 0.8 + 240 / 1500 36 + (9 * 1.6667) 0.8 + Fy / 1500 36 + 9β

Tebal pelat yang diambil = h = 100 mm = 10 cm Pendimensian Balok Balok  l = 5000 mm Berdasarkan RSNI 2002 (untuk balok 2 tumpuan) h = 1/16 l h = 1/16 * 5000 mm = 312.5 mm 4

Diambil

h = 350 mm (asumsi)

B = 0.5 x h = 175 mm Pendimensian Kolom 

 Digunakan Balok Ukuran 175 / 350 mm

Kolom A ( dari lantai 3 ke atap ) Beban mati atap : Berat sendiri pelat (0.1 x 2400)

=

240 kg / m2

Utilitas

=

25 kg / m2

Berat finishing (0.02 x 2400)

=

48 kg / m2

=

313 kg / m2

Berat sendiri pelat ( 0.1 x 2400 x 5 x 3 )

=

3600 kg / m2

Berat sendiri balok 175 / 350 ( 0.175 x 0.35 x 2400 x 5 )

=

735 kg / m2

Berat sendiri balok 175 / 350 ( 0.175 x 0.35 x 2400 x 3 )

=

441 kg / m2

Berat finishing (0.02 x 2400)

=

48 kg / m2

Dead Load (DL)

a

q terfaktor = 1.2 DL = 1.2 x 313 = 375.6 kg / m2 Beban kolom = 3 x 5 x 375.6 = 5634 kg = 56340 N  Σ DI = 56340 N A>

Σ DI 40 % x 0.85 x ƒc’

A>

56340 40 % x 0.85 x 30’

A> Asumsi

5523.529 mm2 b = h  A = h2 h = √5523.529 = 74.32 mm b = h > 74.32 mm

 Diambil asumsi ukuran kolom 150 x 150 mm



Kolom B ( dari lantai 2 ke lantai 3 ) Beban kolom :

5

Berat kolom atas ( 0.15 x 0. 15 x 2400 x 3 )

=

162 kg / m2

Berat spesi (2 x 21)

=

42 kg / m2

=

5028 kg / m2

Berat sendiri pelat ( 0.1 x 2400 x 5 x 3 )

=

3600 kg / m2

Berat sendiri balok 175 / 350 ( 0.175 x 0.35 x 2400 x 5 )

=

735 kg / m2

Berat sendiri balok 175 / 350 ( 0.175 x 0.35 x 2400 x 3 )

=

441 kg / m2

Berat finishing (0.02 x 2400)

=

48 kg / m2

Berat kolom atas lantai 3 ( 0.15 x 0. 15 x 2400 x 3 )

=

162 kg / m2

Berat kolom atas lantai 2 ( 0.15 x 0. 15 x 2400 x 4 )

=

216 kg / m2

Berat spesi (2 x 21)

=

42 kg / m2

=

5244 kg / m2

DL

a

 Σ DI = 5028 kg / m2 = 50280 N A>

Σ DI 40 % x 0.85 x ƒc’

A>

50280 40 % x 0.85 x 30’

A> Asumsi

4929.41 mm2 b = h  A = h2 h = √4929.41 = 70.20 mm b = h > 70.20 mm

 Diambil asumsi ukuran kolom 150 x 150 mm



Kolom C ( dari lantai 1 ke lantai 2 ) Beban kolom :

DL

a

 Σ DI = 5244 kg / m2 = 52440 N A>

Σ DI 40 % x 0.85 x ƒc’

A>

52440 40 % x 0.85 x 30’ 6

5141.176 mm2

A> Asumsi

b = h  A = h2 h = √5141.176 = 71.70 mm b = h > 71.70 mm

 Diambil asumsi ukuran kolom 150 x 150 mm 2. Pembebanan Pelat Lantai 1. Beban Mati / Dead Load (DL)  Berat sendiri pelat t = 100 mm (0.1 x 2400)

240 kg / m2

=

 Berat finishing (0.1 x 24)

= DL

=

2.4 kg / m2 242.4 kg / m2

2. Beban hidup / Living Load (LL) Untuk bangunan rumah tinggal

LL

=

150 kg / m2

3. Perhitungan Momen Rencana Terfaktor Berdasarkan RSNI 2002 qu

=

1.2 DL + 1.6 LL

=

1.2 (242.4) + 1.6 (150)

=

290.88 + 240

= 530.88 kg / m2

4. Perhitungan Momen Lentur Pelat Diambil panel terbesar Lx = 3000 = 3 m ; Ly = 5000 = 5 m β

= Ly Lx

= 5000 3000

= 1.6667  Pelat dua arah

Dimana nilai x : Mlx

=

- Mtx  35 7

Mly

=

- Mty  35

Mlx

=

- Mtx =

Mlx

=

0.001 * qu * Lx2 * x

=

0.001 * 530.88 * (3)2 * 35

=

167.2272 Kg.m

- Mtx =

0.001 * qu * Lx2 * x

=

0.001 * 530.88 * (3)2 * 35

=

167.2272 Kg.m

5. Penulangan Pelat Arah x : Fy = 240 Mpa Tulangan lapis (jd) I = d1 = 100 - 20 = 80 mm Mn Φ x ƒy x jd

As =

=

1672272 0.8 x 240 x 0.9 x 80

= 120.968 mm2

Pakai Φ 8 : As = ¼ π D2 = ¼ x 3.14 x 0.82 = 0.5 cm2 S=

0.5 1.20968

X 100 = 4.333 cm

Ambil S = 40 cm  Digunakan Penulangan Φ 8 – 400 mm Cek terhadap ρmin pelat ! ρmin = 0.002  Amin = ρmin x b x h = 0.002 x 100 x 9 = 1.8 cm2 = 180 mm2 S=

0.5 1.8

X 100 = 27.7777 cm

 Digunakan Penulangan Φ 8 – 250 mm Arah y : fy = 240 Mpa 8

Tulangan lapis (jd) II = d2 = 80 - 8 = 72 mm Mn Φ x ƒy x jd

As =

1672272 0.8 x 240 x 0.9 x 72

=

= 134.41 mm2

Pakai Φ 8 : As = ¼ π D2 = ¼ x 3.14 x 0.82 = 0.5 cm2 0.5 1.3441

S=

X 100 = 37.199 cm

Ambil S = 35 cm  Digunakan Penulangan Φ 8 – 350 mm

PENULANGAN PORTAL Penulangan Balok Diketahui : Dimensi Balok

=

175 x 350 mm

Dimensi Kolom

=

150 x 150 mm

Selimut Beton

=

1 / 10 h

d

=

h – sel. beton = 350 – 35 = 315 mm



=

1 / 10 (350) =

35 mm

Penulangan Tarik Balok Terlentur (dari : Struktur Beton Bertulang Istimawan) Tumpuan Mu

= 814.4 kg-m

As =

Mu Φ x γ x d x ƒy

Asumsi tulangan 2 D 12

= 8144000 Nmm =

8144000 0.8 x 0.9 x 315 x 240

= 149.67 mm2

 2 x (1/4) x π x (122) = 226.1946 mm2

Kontrol : Ratio penulangan : ρ

=

As bxd

=

226.1946 175 x 315

= 4.10 x 10-3

9

0.75 ρ

=

0.75 x

0.85 x ƒc’ x β1 ƒy

600 600 + ƒy

0.75 ρ

=

0.75 x

0.85 x 30 x 0.85 240

600 600 + 240

0.75 ρ

= 0.04821

ρmin

1.4 ƒy

=

Syarat 

1.4 240

=

= 0.00583

ρ < 0.75 x ρb 0.00410 < 0.04821  OK

Kedalaman balok tegangan beton tekan : a

=

As x ƒy (0.85 x ƒc’ x b)

=

226.1946 x 240 (0.85 x 30 x 175)

= 12.1650 mm

Panjang lengan momen kopel dalam : Z

=

1 2

D-

a

=

315 -

1 2

12.1650

= 308.9175 mm

Momen tahanan (momen dalam) ideal : Mn

= As x fy x z = 226.1946 x 240 x 308.9175 = 16770112 Nmm

Mr

= Φ Mn

= 0.8 x 16770112

Mu

<

=

Mr

= 13416089 Nmm

8144000 Nmm

<

13416089 Nmm

 OK

 Pada tumpuan digunakan tulangan 2 D 12 Lapangan Mu

= 1407.3 Kg-m

As =

Mu Φ x γ x d x ƒy

Asumsi tulangan 3 D 12

= 14073000 Nmm =

14073000 0.8 x 0.9 x 315 x 240

= 258.542 mm2

 3 x (1/4) x π x (122) = 339.12 mm2

Kontrol : Ratio penulangan : ρ 0.75 ρ

= =

As bxd 0.75 x

=

339.12 175 x 315

0.85 x ƒc’ x β1 ƒy

= 6.15 x 10-3 600 600 + ƒy 10

0.85 x 30 x 0.85 240

0.75 ρ

=

0.75 ρ

= 0.04821

ρmin

0.75 x

1.4 ƒy

=

Syarat 

600 600 + 240

1.4 240

=

= 0.00583

ρmin < ρ < 0.75 x ρb 0.00583 < 0.00615 < 0.04821  OK

Kedalaman balok tegangan beton tekan : a

=

As x ƒy (0.85 x ƒc’ x b)

=

339.12 x 240 (0.85 x 30 x 175)

= 18.2383 mm

Panjang lengan momen kopel dalam : Z

=

D-

1 2

a

=

315 -

1 2

18.2383

= 305.8808 mm

Momen tahanan (momen dalam) ideal : Mn

= As x fy x z = 339.12 x 240 x 305.8808 = 24895271 Nmm

Mr

= Φ Mn

= 0.8 x 16770112

Mu

<

=

Mr

= 19916216 Nmm

14073000 Nmm

<

19916216 Nmm

 OK

 Pada tumpuan digunakan tulangan 3 D 12



Penulangan Geser Balok Terlentur (dari : Struktur Beton Bertulang Istimawan) Tumpuan Vu

= 2891.4 kg

= 28914 N

Vc

= 1/6 √ƒc’ * bw * d = 1/6 √30 * 175 * 315

= 50318.1 N

Pemeriksaan perlu tidaknya sengkang : ½ Φ * Vc = ½ * 0.6 * 50318.1 = 15095.43 N Vu = 28914 N > ½ Φ Vc = 15095.43 N 11

 Tulangan sengkang diperlukan Perencanaan Sengkang : 7560000 Vu Φ

Vs =

28914 0.6

- Vc =

- 50318.1 = -2128.1

Asumsi dengan tulangan Φ 8  Av = 2 As = 100 mm2 s=

Av . ƒy . d bw

=

3 Av . ƒy b

s max =

100 * 240 * 315 -2128.1

= 3552.464 mm

3 * 100 * 240 175

=

= 411.42 mm

Pada tumpuan digunakan tulangan Φ 8 – 400 Kontrol : Vs =

Av . ƒy . d s

=

100 * 240 * 315 250

= 30240 N

Φ (Vc + Vs) = 0.6 (50318.1 + 30240) = 48334.86 N Vu = 28914 N < Φ (Vc + Vs) = 48334.86 N  OK Lapangan L

=

5m

= 5000 mm

Vu

=

722.85 kg

Vc

=

1/6 √ƒc’ * bw * d

= 7228.5 N  (jarak ¼ x 5000 = 1250 mm) =

1/6 √30 * 175 * 315 = 50318.1 N

Pemeriksaan perlu tidaknya sengkang : ½ Φ * Vc = ½ * 0.6 * 50318.1 = 15095.43 N Vu = 722.85 N < ½ Φ Vc = 15095.43 N  Tulangan sengkang tidak diperlukan 

Penulangan Torsi Balok Terlentur (dari : Struktur Beton Bertulang Istimawan) 5.477 Tumpuan Tu

=

0.28 kg-m

=

2800 N

Σ x2y = 1752 * 500 = 15312500 m m3 Pemeriksaan perlu tidaknya sengkang : 12

Φ (1/4 √ƒc’) Σ x2y = 0.6 (1/4 √30) 15312500 = 12579984 Nmm Tu = 2800 Nmm < Φ (1/4 √ƒc’) Σ x2y = 12579984 Nmm  Tulangan sengkang tidak diperlukan Cat : Tidak diperlukan tulangan Torsi PENULANGAN KOLOM 

Penulangan Lentur Kolom Fc’

= 30 Mpa

B

= 150 mm

H

= 150 mm

Fy

= 240 Mpa

Pu

= 3412.19 kg

= 341219 N

Mu

= 814.4 kg-m

= 8144000 Nmm

Pn

=

Pu Φ

=

341219 0.65

= 524952.3 N

Mn

=

Mu Φ

=

8144000 0.65

= 12529230 N

Pn ƒc . b . h

x

0.7 0.65

=

524952.3 30 * 150 * 150

x

0.7 0.65

= 0.8367

Mn ƒc . b . h2

x

0.7 0.65

=

12529230 30 * 150 * 1502

x

0.7 0.65

= 0.1332

G

=

h – (2.40 + 2.10 + 13) h

m

=

ƒy = 0.85 * ƒc’

ρtperlu = Ast

0.1307 16

=

240 0.85 * 30

150 – (2.40 + 2.10 + 13) 150

= 0.2466

= 16

= 0.00816

= ρtperlu . b . h = 0.00816 . 150 . 150 = 183.6 mm2

 Dipakai tulangan 4 D 10 = 314 m2 13



Penulangan Geser Kolom (tulangan Tumpuan, tulangan Lapangan) Gaya Geser Data ETABS : Gaya geser lapangan

=

40.24 kg

Gaya geser tumpuan atas

=

40.24 kg

Gaya geser tumpuan bawah

=

40.24 kg

Desain tulangan geser lapangan : Vu

= 40.24 kg = 402.4 N 0.3 * Pu Ag

=

(1+

) (

=

* 341219 ( 1 + 0.3 (150) ) ( 2

√ƒc’ 6

)

√30 6

bw . d

)

150 . 130

= 98767.5 N Φ Vc = 0.75 * 98767.5 = 74075.625 N Φ Vc = 74075.625 > Vu kritis = 402.4 N  OK  Tulangan geser minimum Selimut beton = 1 / 10 h = 20 mm d

= 150 – 20 = 130 mm

Pakai sengkang Φ 10 = Av = 2 Φ 10 = 157 mm2 s=

Av . ƒy . d ΦVc

=

157 * 240 * 130 74075.625

= 66.127 mm

s = 66.127 mm > ½ 130 = 65 mm Maka dipakai tulangan Φ 10 - 65 Desain tulangan geser tumpuan atas : Vu

= 40.24 kg = 402.4 N =

(1+

0.3 * Pu Ag

) (

√ƒc’ 6

)

bw . d

14

=

* 341219 ( 1 + 0.3 (150) ) ( 2

√30 6

)

150 . 130

= 98767.5 N Φ Vc = 0.75 * 98767.5 = 74075.625 N Φ Vc = 74075.625 > Vu kritis = 402.4 N  OK  Tulangan geser minimum Selimut beton = 1 / 10 h = 20 mm d

= 150 – 20 = 130 mm

Pakai sengkang Φ 10 = Av = 2 Φ 10 = 157 mm2 s=

Av . ƒy . d ΦVc

157 * 240 * 130 74075.625

=

= 66.127 mm

s = 66.127 mm > ½ 130 = 65 mm Maka dipakai tulangan Φ 10 - 65 Desain tulangan geser tumpuan bawah : Vu

= 40.24 kg = 402.4 N 0.3 * Pu Ag

=

(1+

) (

=

* 341219 ( 1 + 0.3 (150) ) ( 2

√ƒc’ 6

)

√30 6

bw . d

)

150 . 130

= 98767.5 N Φ Vc = 0.75 * 98767.5 = 74075.625 N Φ Vc = 74075.625 > Vu kritis = 402.4 N  OK  Tulangan geser minimum Selimut beton = 1 / 10 h = 20 mm d

= 150 – 20 = 130 mm

Pakai sengkang Φ 10 = Av = 2 Φ 10 = 157 mm2 s=

Av . ƒy . d ΦVc

=

157 * 240 * 130 74075.625

= 66.127 mm

s = 66.127 mm > ½ 130 = 65 mm 15

Maka dipakai tulangan Φ 10 - 65

PENULANGAN PONDASI Penulangan Pondasi Diketahui : Kolom 150 / 150 mm Dari Output Etabs, diperoleh : P

= 218 N

H

= 330 N

M

= 99 Nmm

Tebal pelat pondasi 250 mm, cover 75 mm Tebal Tanah diatas pondasi fc’

= 30 Mpa

fy

= 240 Mpa

σt

= 0.1 Mpa

= 1500 mm

γ tanah

= 18 KN / m3 = 1800 N / m3

γ beton

= 24 KN / m3 = 2400 N / m3

1. Pembebanan Pondasi : Berat tanah = 1.5 x 1800 Berat pondasi

= 2700 N

= 0.25 x 2400

Berat kolom

= 52440 N P total

A perlu

= 600 N

=

P tot σt

=

= 55740 N (R) 55740 0.1

= 557400 mm2

 diambil Pondasi B x L = 1200 x 1200 mm2 , A pakai = 1440000 mm2 σr

=

55740 1200 x 1200

= 0.0387 Mpa < σ r = 0.1 Mpa  OK

2. Syarat Geser 16

e

M+H.h R

=

99 + 330 * 1750 55740

=

= 10.362 mm

e = 10.362 mm < L / 6 = 200 mm, maka : q max =

R B.L

+

6.M B . L2

q max =

55740 12002

+

6 . 99 12003

q min =

R B.L

-

6.M B . L2

q max =

55740 12002

-

6 . 99 12003

= 0.039 N / mm2

= 0.0387 N / mm2

Geser satu arah d = 150 – 75 = 75 mm s1 = s2 = ½ (1200 – 150) – 75 = 450 mm Vc = 1/6 √ƒc’ B . d = 1/6 √30 . 1200 . 75 = 0.912 . 1200 . 75 = 82080 N ΦVc = 0.75 Vc = 61560 N Va = q max . B.s = 0.039 . 1200 . 450 = 21060 N Va = 21060 N < ΦVc = 61560 N  OK Geser dua arah Bo = (C1 + d + C2 + d) = (150 + 75 + 150 + 75) = 450 mm C1 C2

Bc =

=

150 150

=1

α s = 40 (untuk kolom interior) Vu = q max (B . L – (C1 + d)(C2 + d)) = 0.039 (12002 – 2252) = 54185.625 N Vc =

1 6

Vc =

1 √ƒc’ . bo . d = 61560 N 3

(

1+

2 Bc

) √ƒc’ . bo . d = 92340 N

Maka Vc = 92340 N

17

Φ Vc = 0.75 Vc = 69255 N Φ Vc = 69255 N > Vu = 54185.625 N  OK 3. Tulangan angker / stek As min

= 0.005 . A kolom = 0.005 . ( 150 x 150) = 112.5 mm2 = 112.5 mm2 

As stek

db stek perlu = √112.5 / 4 * ¼ π = 5.985 Db stek = 10 mm  4 D 10 = 314 mm2

4. Transfer gaya pada dasar kolom Kuat tumpu dasar kolom P

= 218 N

Φ Pnb 2

= Φ (0.85 . ƒcp . Ap) = 17850000 N

P

= 218 N < Φ Pnb 2 = 17850000 N  OK

Kuat tumpu permukaan pondasi A2 = 12002 = 1440000 mm2 A1

= 1502 = 22500 mm2

√ A2 / A1

= 1440000 / 22500 = 64 > 2

P

= 218 N < Φ Pnb 2 = 17850000 N  OK

5. Penulangan pondasi Mu =

q x (s + s) 2

Mu =

0.039 x (450 + 450) 2 + 1200 x 2 3

As =

Mu = 26.667 mm2 Φ . γ d . ƒy

+bx

2 3

xs x 450 = 360017.55 N

As min = 0.0018 * 250 * 1200 = 540 mm2 A perlu = 450 mm2  6 D 10 = 471.238

18

PERENCANAAN TANGGA Tangga direncanakan menggunakan konstruksi kayu (pengembangan selanjutnya akan dilakukan dengan memperhatikan kondisi finansial yang tersedia). + 6.20 Lantai 3

+ 4.70

+ 3.20 Lantai 2

+ 1.60

+ 0.00 Lantai 1 1.00

2.00

Syarat tangga : 19

-

Sudut Kemiringan demi kenyamanan adalah 25° hingga 35°

-

Tinggi tanjakan (Optrade)

: 16 – 20 cm

-

Lebar tanjakan (Antrade)

: 25 – 30 cm

Rencana pendimensian tangga : Asumsi Lebar tanjakan yang diambil adalah : 25 cm Jumlah tanjakan (n) = L / 25

= 200 / 25

= 8 buah tanjakan

Dengan begitu total jumlah tanjakan hingga lantai berikutnya adalah 18 buah (seperti pada gambar rencana tangga).

10

11

12

13

14

15

16

17

18 Lantai

atas

9 8

7

6

5

4

3

2

1

Lantai bawah

Tinggi tanjakan Tangga lantai 1 ke lantai 2 (o) = 320 / 18 = 17.77 cm Tinggi tanjakan Tangga lantai 2 ke lantai 3 (o) = 300 / 18 = 16.66 cm Jumlah Injakan

= 18 buah

Syarat : Lebar langkah

= 20 + A

< 45 – 65 cm

= 20 + 25

< 45 – 65 cm

= 45

< 45 – 65 cm  OK

Pembebanan Pada Pelat Tangga 1. Beban Mati (DL) Berat sendiri pelat (0.15 x 2400 x sec 37)

=

450.769 kg/ m2

Berat sendiri anak tangga = (0.15 x 0.166 x 2400)

=

59.76 kg/ m2

DL

=

510.529 kg/ m2 20

2. Beban Super Dead (SDL) B. S Ubin (t = 0.5 cm) 0.005 x 1800 B. S Spesi (t = 3 cm) 0.03 x 2100

= =

12 kg/ m2

63 kg/ m2

B. S Sandaran

=

20 kg/ m2

Pasir (t = 3 cm) 0.03 x 1800

=

54 kg/ m2

=

149 kg/ m2

SDL 3. Beban Hidup (LL) 150 kg/ m2

LL

=

qu

= 1.2 DL + 1.2 SDL + 1.6 LL = 1.2 (510.529) + 1.2 (149) + 1.6 (150) = 1031.434 kg/ m2



Pembebanan Bordes 1. Beban Mati (DL) Berat sendiri pelat (0.15 x 2400)

=

360 kg/ m2

DL

=

360 kg/ m2

=

12 kg/ m2

2. Beban Super Dead (SDL) B. S Ubin (t = 0.5 cm) 0.005 x 1800 B. S Spesi (t = 3 cm) 0.03 x 2100

=

63 kg/ m2

B. S Sandaran

=

20 kg/ m2

Pasir (t = 3 cm) 0.03 x 1800

=

54 kg/ m2

=

149 kg/ m2

SDL 4. Beban Hidup (LL) 150 kg/ m2

LL

=

qu

= 1.2 DL + 1.2 SDL + 1.6 LL = 1.2 (360) + 1.2 (149) + 1.6 (150) = 850.8 kg/ m2

Dari hasil ETAB didapat data sebagai berikut : Pada pelat tangga 21

Momen M11 = 257.717 kg . m Momen M22 = 627.443 kg . m Pada pelat bordes Momen M11 = 522.904 kg . m Momen M22 = 764.004 kg . m Penulangan Tangga : 

Penulangan Arah X : Mu

= 2577170 Nmm

d

= dx – 20 = 150 – 20 = 130 Nmm

A perlu

=

Mu ΣΦ. Jd . ƒy

=

2577170 0.8 (0.9 * 130) 240

As min

= 0.0018 . 1200 . 130 = 280.8 mm2

As perlu

= 114.775 mm2 < As min = 280.8 mm2

= 114.775 mm2

Diameter tulangan Φ 10 = 79 mm2 280.8 / 79 = 3.55  4 buah Dengan jarak : 1200 – (20 + 8 + (3.10) + 8 + 20) 4

= 278.5  300 mm

 Dipakai tulangan (4 Φ 10 – 300)  As = 236 mm2



Penulangan Arah Y : Mu

= 6274430 Nmm

d

= dx – 20 = 150 – 20 = 130 Nmm

A perlu

=

Mu ΣΦ. Jd . ƒy

=

6274430 0.8 (0.9 * 130) 240

As min

= 0.0018 . 1800 . 130 = 421.2 mm2

As perlu

= 279.310 mm2 < As min = 421.2 mm2

= 279.310 mm2

22

Diameter tulangan Φ 10 = 79 mm2 421.2 / 79 = 5.33  6 buah Dengan jarak : 1800 – (20 + 8 + (6.10) + 8 + 20) 6

= 280.6607  250 mm

 Dipakai tulangan (4 Φ 10 – 250)  As = 471 mm2 Penulangan Bordes 

Penulangan Arah X : Mu

= 5229040 Nmm

d

= dx – 20 = 150 – 20 = 130 Nmm

A perlu

=

Mu ΣΦ. Jd . ƒy

=

5229040 0.8 (0.9 * 130) 240

As min

= 0.0018 . 1800 . 130 = 421.2 mm2

As perlu

= 232.774 mm2 < As min = 421.2 mm2

= 232.774 mm2

Diameter tulangan Φ 10 = 79 mm2 421.2 / 79 = 5.33  6 buah Dengan jarak : 1800 – (20 + 8 + (6.10) + 8 + 20) 6

= 280.6607  250 mm

 Dipakai tulangan (4 Φ 10 – 250)  As = 471 mm2



Penulangan Arah Y : 22464 Mu

= 760040 Nmm

d

= dx – 20 = 150 – 20 = 130 Nmm

A perlu

=

Mu ΣΦ. Jd . ƒy

=

760040 0.8 (0.9 * 130) 240

As min

= 0.0018 . 1200 . 130 = 280.8 mm2

As perlu

= 340.101 mm2 < As min = 280.8 mm2

= 340.101 mm2

23

Diameter tulangan Φ 10 = 79 mm2 280.8 / 79 = 3.55  4 buah Dengan jarak : 1200 – (20 + 8 + (4.10) + 8 + 20) 4

= 276  250 mm

 Dipakai tulangan (4 Φ 10 – 250)  As = 471 mm2

24

Gbr. Rencana Struktur dan Konstruksi Pelat Lantai dan Kolom

25

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