Fayanita, Lisa (2015) Modifikasi Dinding Circular Primary Clarifier Tank PT. Petrokimia Gresik Menggunakan Beton Prategang. Undergraduate thesis, Institut Technology Sepuluh Nopember.
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Abstract
Circular Primary Clarifier Tank merupakan tangki beton
bertulang pengolah air limbah milik PT. Petrokimia Gresik.
Dindingnya yang semula tersusun dari beton bertulang akan
dimodifikasi menjadi menggunakan beton prategang. pengertian
beton prategang menurut definisi ACI ialah “beton yang
mengalami tegangan internal dengan besar dan distribusi
sedemikian rupa sehingga dapat mengimbangi sampai batas
tertentu tegangan yang terjadi akibat beban eksternal”.
Tekanan yang terjadi pada dinding Circular Primary
Clarifier Tank bervariasi sesuai dengan elevasi. Oleh karena itu
gaya prategang yang dibutuhkan pun akan berbeda-beda sesuai
dengan gaya yang terjadi pada dinding. Dalam perhitungan
kebutuhan gaya prategang akan digunakan beberapa jumlah
strand yang bermacam-macam sesuai dengan kebutuhan.
Kehilangan gaya prategang akan dihitung dalam 2 kondisi, yaitu
short term dan long term.
Modifikasi dilakukan berdasarkan “Building Code
Requirements for Structural Concrete (ACI 318-11)”, “Design
and Construction of Circular Prestressed Concrete Structure with
Circumferential Tendons (ACI 373R-97)”, “Design and
Construction of Circular Wire- and Strand- Wrapped
Prestressed- Concrete Structures (ACI 372R-00)”, “Tata Cara
Perencanaan Ketahanan Gempa untuk Bangunan Gedung (SNI
03-1726-2002)”.
vi
Hasil yang didapat dari perencanaan Circular Primary
Clarifier Tank yaitu ketebalan dinding yang berubah dari semula
35 cm menjadi 26 cm, kehilangan prategang kondisi short term
dan long term, penulangan 10D19 untuk tulangan lentur dan
5D25 untuk tulangan lentur lapangan balok melingkar dan
tulangan pakai 10D10 untuk perencanaan kolom. Perencanaan
pondasi menggunakan metode Luciano Decourt menghasilkan
jumlah bored pile yang dibutuhkan sebanyak 168 buah dengan
jarak x dan y antar pilar sebesar 2.9 meter.
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Circular Primary Clarifier Tank is a reinforced concrete
based tank for waste water treatment belongs to PT. Petrokimia
Gresik. The wall were originally design with reinforced concrete,
and later will be replace by the prestresed one. The definition of
prestressed concrete itself, according to ACI, is “structural
concrete in which internal stresses have been introduced to
reduce potential tensile stresses in concrete resulting from
loads”.
The pressure occured Circular Primay Clarifier Tank’s
wall in different value based on the elevation. Therefore it’s also
effected how big the force of the prestressed on the wall.
Calcuation for prestressed force involves different kind of strands
to adjust the needs of the variation. Prestressed loss will be
calculate in 2 conditions, short and long term.
Modification on the wall refers to “Building Code
Requirements for Structural Concrete (ACI 318-11)”, “Design
and Construction of Circular Prestressed Concrete Structure with
Circumferential Tendons (ACI 373R-97)”, “Design and
Construction of Circular Wire- and Strand- Wrapped
Prestressed- Concrete Structures (ACI 372R-00)”, “Tata Cara
Perencanaan Ketahanan Gempa untuk Bangunan Gedung (SNI
03-1726-2002)”.
The result of structure analysis based on the Circular
Primary Clarifier Tank plans are wall thickness changes from 35
viii
cm to 26 cm, prestressed lost in short term and long term, 10D19
reinforcement configuration for elastic reinforcement and 5D25
for the one in the middle of the circular beam and 10D10 for
column. Foundation planned using Luciano Decourt method and
the result is the amount of bored pile that’s going to be used,
which is 168 bored pile and the space between x and y to the
bored pile is 2.9 meter.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSS 690.53 Fay m |
| Uncontrolled Keywords: | Circular Tank, Tangki, Beton Prategang |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 11 Jun 2019 07:31 |
| Last Modified: | 11 Jun 2019 07:31 |
| URI: | http://repository.its.ac.id/id/eprint/63104 |
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