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PENULANGAN PLAT TANGGA ATAS DAN BAWAH

Data - data

- Balok diambil bentang yang terpanjang

- Tumpuan jepit-jepit

tebal plat 0.15 m fc' (beton) 22.5 Mpa

tebal spesi 2 cm fy' (baja) 320 Mpa

tebal tegel 3 cm d' 20 mmbeban plafond 0 kg/m2 L 2.1 m

beban penggantung 0 kg/m2 optred 0.3 m

beban AC + pipa 0 kg/m2 antrade 0.2 m

tebal air hujan 0 m a 35.5 derajat

beban guna 300 kg/m2

Gambar Rencana

697.33 kg/m

1,435.69 kg/m

1.5 m

1.6 m 2.1 m

q = 1,435.69 kg/m2

Pembebanan

Beban terbagi rata

Beban mati

pelat =

[0.15/cosA + 0.2/2] x 2400 = 682.405 kg/m2

spesi = 2 x 21 = 42

keramik = 3 x 24 = 72

plafond = 0

penggantung = 0AC + pipa = 0

DD = 796.405 kg/m2

Beban hidup

air hujan = 0 kg/m2

guna = 300

DL 300 kg/m2

Beban berfaktor

D = 1,2 x 796.41 + 1,6 x 300 = 1435.69 kg/m2

BORDES FLIGHT/ANAK TANGGA

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Statika

- Tumpuan jepit-jepit

- Beban merata

q = 1435.69 kg/m2

L = 2.1 m- Beban terpusat plat anak tangga tengah 160 x 250cm (bordes)

P = 1.5 x 0.5 x 1.6 x 1,435.69 = 1722.82 kg

L = 2.1 - 0.5 x 250 = 0.85 m

Mtangga = 1/10 x 1,435.69 x 2.1^2 = 633.138 kgm

Mbordes = 0.9 x 1,722.82 x 0.850 = 627.6 kgm

2.1

Penulangan

Penulangan tangga

Mu 633.14 kgm b 1000 mm

fc' (beton) 22.5 Mpa h 150 mm

fy' (baja) 320 Mpa d' 20 mm

pmin = 1,4 / 320 = 0.0044

pmaks = 0,75 x (0,85 x 22.5)/320 x 0,85 x [600/(600+320)]

= 0.0248

Mu = 633.14 kgm = 6.33 kNm

d = 150 - 20 = 130 mm

j = 0.8

Rn = (6.33 x 10^6) = 0.4683 Mpa

(0,8 x 1000 x 130^2)

W = 0,85 { 1 -sqrt[1 - (2,353 x 0.4683)/22.5]}

= 0.0211 As (mm2)

p = 0.0211 x 22.5/320 = 0.0015 > 0.0044 568.75

< 0.0248 3230.2671

ppakai = 0.0044

As = 0.0044 x 1000 x 130 = 568.75 mm2

As' = 0.002 x 1000 x 130 = 260.00 mm2

Tulangan(tul tarik) 568.75 D12 - 175 ( 646 mm2 )

Tulangan (tul tekan 260.00 D8 - 200 ( 251 mm2 )

Penulangan bordes

Mu 627.60 kgm b 1000 mm

fc' (beton) 22.5 Mpa h 150 mm

fy' (baja) 320 Mpa d' 20 mm

pmin = 1,4 / 320 = 0.0044

pmaks = 0,75 x (0,85 x 22.5)/320 x 0,85 x [600/(600+320)]

= 0.0248

Mu = 627.60 kgm = 6.28 kNmd = 150 - 20 = 130 mm

j = 0.8

Rn = (6.28 x 10^6) = 0.4642 Mpa

(0,8 x 1000 x 130^2)

W = 0,85 { 1 -sqrt[1 - (2,353 x 0.4642)/22.5]}

= 0.0209 As (mm2)

p = 0.0209 x 22.5/320 = 0.0015 > 0.0044 568.75

< 0.0248 3230.2671

ppakai = 0.0044

As = 0.0044 x 1000 x 130 = 568.75 mm2

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As' = 0.002 x 1000 x 130 = 260.00 mm2

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Tulangan(tul tarik) 568.75 D12 - 175 ( 646 mm2 )

Tulangan (tul tekan 260.00 D8 - 200 ( 251 mm2 )

Gambar Penulangan