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STRUKTUR BETON PRACETAK
PROGRAM STUDI SARJANA TERAPAN REKAYASA PEMELIHARAAN DAN PENGELOLAAN BANGUNAN SIPIL
DEPARTEMEN TEKNIK INFRASTRUKTUR SIPIL ITS
CHAPTER – 3
PRECAST BEAM COMPONENT
Tim Pengajar :
Afif Navir Refani, ST., MT.
I PI T S 2 0 1 5
1


2
PRECAST CONCRETE
PRECAST BEAM
10
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BEAMS
3
BEAMS
4
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BEAMS
5
6
DESIGN OFPRECAST BEAM COMPONENT
Calculation Stage 1
Preliminary of Beam Section
Deflection Control of Precast
Section of Beam
6
(lifting stage)
Calculation Stage 2
(Erection Stage)
Before Composite
(Load = Selfweight + Precast
Slab Component)
Calculation Stage 4
Calculation Stage 3
Flexture & Shear Reinf. Of
Precast Beam Section
(Accommodate Live load
based on building function).
(Load = Selfweight + Precast
Slab + Overtopping +
Construction Load)
Before Composite
(add overtopping)
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CASE STUDY 1
(BEAM PRECAST)
2
CASEBALOK PRECAST
BI‐1
BI‐1
7
Kondisi Saat
Pengangkatan
Diketahui :
Fc’ = 35 Mpa
Fy = 400 Mpa
BI‐1 = 50x70
BA‐1 = 40x60
Kondisi
Sebelum
Komposit
( Instalasi +
Pengecoran)
Kondisi
Setelah
Komposit
(Beban
Operasional
Bekerja)
Desainlah balok anak BA‐1 dan balok induk BI‐1 sehingga cukup aman untuk menerima beban pada tiap – tiap
tahapan Pracetak
8
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9
PEMBEBANAN
9
KONDISI SAAT PENGANGKATAN
10
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11
MOMENYANGTERJADI
12
FLEXTUREREBARCALCULATION
11
12
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13
CAPACITYCHECK
14
CRACK & DEFLECTION CONTROL
13
14
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KONDISI SEBELUM KOMPOSIT
15
16
16
FLEXTUREREINFORCEMENT
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17
CAPACITYCHECK
18
CAPACITYCHECK
17
18
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KONDISI SETELAH KOMPOSIT
19
20
20
MOMENT CAPACITYCONTROL
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21
FLEXTUREREBARCALCULATION
22
MOMENT CAPACITYCONTROL
21
Tumpuan
(Sendi Plastis)
Lapangan
(Diluar Sendi
Plastis)
22
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23
SHEARREINFORCEMENT CALCULATION
24
SHEARREINFORCEMENT CALCULATION
23
24
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25
SHEARREINFORCEMENT CALCULATION (lapangan)
26
SHEARREINFORCEMENT CALCULATION (lapangan)
25
26
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27
DETAILINGREQUIREMENT
28
DETAILINGREQUIREMENT
27
28
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PRAKTEK
(BEAM PRECAST)
29
30
BEAM PRECAST
B2
• Kuat tekan beton (fc’)
• Kuat leleh tulangan lentur (fy)
• Kuat leleh tulangan geser (fy)
30
•
•
•
•
•
•
•
: 30 MPa
: 400 MPa
: 400 MPa
Dimensi Balok
B2
= 40/70
cm
Diameter tul. Lentur
= 22
mm
Diameter tul. Sengkang
= 13
mm
Dimensi balok induk sebelum komposit = 40/56.
Bentang balok (L balok)
:7m
Bentang kolom (L kolom)
:7m
Dimensi kolom
: 60/60 cm