Asis Beton 1.pdf

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PERENCANAAN DIMENSI BALOK

1.1.Data-data Perencanaan Tipe bangunan

: bangunan 2 lantai

Tinggi bangunan : 9,5 m Lebar bangunan

: 12 m

Mutu beton (fc’) : 30 MPa Mutu baja (fy)

: 400 MPa

1.2.Pedoman yang dipakai 1.

SNI : 03-2847-2013 tentang “Tata Cara Perhitungan Struktur Beton untuk Bangunan Gedung”

2.

Peraturan Pembebanan Indonesia Untuk Gedung 1983

3.

Peraturan Beton Bertulang Indonesia 1971

1.3.Dimensi Balok (SNI 03-2847-2002 pasal 11.5.2-3, tabel 8 a. Balok induk melintang bentang λ = 600 cm h

λ

fy

= 16 × [0,4 + (700)] =

600 16

400

× [0,4 + (700)]

= 36,43 cm ≈ 40 cm b

2

=3×h 2

= 3 × 36,43 = 24,29 cm ≈ 25 cm Dimensi balok induk memanjang diambil 25/40 cm b. Balok induk memanjang bentang λ = 400 cm h

λ

fy

= 16 × [0,4 + (700)] =

400 16

400

× [0,4 + (700)]

= 24,29 cm ≈ 25 cm b

2

=3×h

2

= 3 × 24,29 = 16,19 cm ≈ 15 cm Dimensi balok induk memanjang diambil 25/40 cm c. Balok kantilever bentang λ = 90 cm h

λ

fy

= 8 × [0,4 + (700)] =

90 8

400

× [0,4 + (700)]

= 9,32 cm ≈ 10 cm b

2

=3×h 2

= 3 × 9,32 = 6,21 cm ≈ 10 cm Dimensi balok anak memanjang diambil 15/15 cm Kesimpulan: 1. Balok induk melintang 6,0 m direncanakan dimensi Balok induk memanjang 4,0 m direncanakan dimensi 2. Balok kantilever 0,9 m

= 25/40 = 20/30 = 15/15

1.4.Pembebanan Balok Memanjang -

Beban segitiga

2

= 3 × ½ × q pelat × L 2

= 3 × ½ × 4.020,40 × 4 = 5.360,53 Kg/m -

Beban trapesium

L

1

1

L

= (½ × q pelat × 3) – (3 × 2 × q pelat × 3 × 4

1

1

4

= (½ × 4.020 × 3) – (3 × 2 × 4.020 × 3 × = 2.581,00 Kg/m -

Berat dinding

= tebal dinding × h dinding × BJ dinding = 0,15 × 4,5 × 650 = 438,75 Kg/m

-

BS balok

= b × h × BJ beton bertulang = 0,2 × 0,3 × 2.400

42 3 42

L2 3 L2

)

)

= 144,00 Kg/m -

qD

= beban segitiga + beban trapesium + berat dinding + BS Balok = 5.360,53 + 2.581,00 + 438,75 + 144,00 = 8.524,28 Kg/m

1.5.Momen Momen lapangan Tepi

=

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