Hafiz, Abdul (2023) Modifikasi Desain Struktur Jalan Layang Harbour II Menggunakan Precast Internal Prestressed Posttensioned Box-Girder Dengan Metode Balanced Cantilever. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pembangunan ruas Jalan Tol Harbour Road II akan dimulai dari Ancol Timur hingga Pluit dengan panjang 9,6 Km dan menggunakan konsep pembangunan Jalan Tol layang (Elevated). Pada fokusan tugas akhir ini, penulis membatasi perencanaan pada ruas jalan tol antara pier 31 sampai dengan pier 36 yang terdiri dari 5 bentang dengan panjang total 235 m dan panjang bentang 47 m sehingga masih dikategorikan struktur jembatan bentang pendek. Dalam tugas akhir ini, perencanaan struktur jalan layang Harbour II melibatkan penggunaan box girder pratekan dengan panjang total 230 meter, terdiri dari 3 bentang dengan panjang masing-masing 65 meter, 100 meter, dan 65 meter. Desain jembatan ini secara khusus mempertimbangkan bentang panjang yang memungkinkan untuk menghindari adanya banyak pilar di daerah simpang Jl.R.E. Martadinata-Jl. Sunter Permai Raya yang merupakan akses langsung menuju Stadion Internasional Jakarta. Dengan mengurangi jumlah pilar menjadi 2 penopang diharapkan dapat mengurangi potensi pengaruh pada area sekitar. Struktur jembatan ini pada awalnya direncanakan menggunakan precast external prestressed posttensioned boxgirder dengan metode ereksi menggunakan launch gantry. Dalam tugas akhir ini, penulis merencanakan struktur jembatan menggunakan precast internal prestressed posttensioned box girder dengan metode balanced cantilever sehingga dimungkinkan merencanakan bentang jembatan yang lebih panjang. Sistem ini termasuk jenis segmental construction dengan metode ereksi menggunakan launching gantry yang dapat mentransfer segmen di sepanjang dek jembatan dan mampu melaksanakan berbagai tugas disepanjang gantry antara lain ereksi pier segment, konstruksi kantilever, dan pengecoran konstruksi closure sehingga mampu meminimalkan gangguan pada lalu lintas eksisting. Beberapa peraturan yang digunakan sebagai acuan dalam melakukan perencanaan modifikasi ini meliputi SNI 1725-2016, RSNI T-12-2004, dan SNI 2833-2016
Perencanaan modifikasi ini dilakukan secara bertahap mulai dari studi literatur dan pengumpulan data, preliminary design, perencanaan struktur sekunder, analisa pembebanan, pemodelan dan analisa struktur utama, penentuan gaya prategang, analisa kehilangan gaya prategang, perhitungan penulangan struktur, kontrol kekuatan dan stabilitas, perencanaan struktur bawah, hingga penyusunan gambar kerja. Permodelan dan analisa struktur dikerjakan dengan bantuan program analisa struktur Midas Civil. Analisa struktur dilakukan dalam tahap pemasangan segmen dan tahap layan. Hasil dari perencanaan ini meliputi desain parapet, dimensi box girder segmental, desain koordinat dan dimensi kabel, desain perletakan dan pilar, serta desain penulangan struktur. Tendon yang digunakan pada jembatan ini memiliki spesifikasi VSL ASTM A 416-06 grade 270. Berdasarkan hasil perencanaan box girder, diperlukan sejumlah 52 buah tendon kantilever dengan jenis tendon 6-19-19 pada pelat atas box, sejumlah 34 buah tendon servis dengan jenis tendon 6-15-15 pada pelat bawah box bentang tengah, serta sejumlah 18 buah tendon servis dengan jenis tendon 6-15-15 pada pelat bawah box bentang tepi. Perletakan yang digunakan adalah menggunakan produk POT bearing dari VSL dan hasil desain dilakukan sendiri. Sedangkan untuk desain pilar, pilar ini memiliki rongga dengan lebar 5 m, panjang 8.1 m, dan tebal dinding 1.5 m.
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The construction of the Harbor Road II Toll Road section will start from East Ancol to Pluit with a length of 9.6 km and use the concept of developing an elevated toll road. In the focus of this final project, the authors limit planning to the toll road section between pier 29 to pier 36 which consists of 7 spans with a total length of 329 m and a span length of 47 m so that it is still categorized as a short span bridge structure. In this final project, the planning of the Harbour II Elevated Road structure involves the use of prestressed box girders with a total length of 230 meters, consisting of 3 spans with lengths of 65 meters, 100 meters, and 65 meters respectively. The design of this bridge specifically considers the use of longer spans to avoid having many pillars in the area of the intersection between Jl.R.E. Martadinata and Jl. Sunter Permai Raya, which is a direct access route to the Jakarta International Stadium. By reducing the number of pillars to 2 supports, it is expected to minimize potential impacts in the surrounding area. The structure of this bridge was originally planned to use a precast external prestressed posttensioned box girder with an erection method using a launch gantry. In this final project, the author will plan the bridge structure using precast internal prestressed posttensioned box girders using the balanced cantilever method so that it is possible to plan longer bridge spans. This system belongs to the segmental construction type with the erection method using a launching gantry which can transfer segments along the bridge deck and is capable of carrying out various tasks along the gantry, including pier segment erection, cantilever construction, and casting closure construction so as to minimize disruption to existing traffic. Several regulations used as references in conducting this modification planning include SNI 1725-2016, RSNI T-12-2004, and SNI 2833-2016. Design for this modification will be completed in stages starting from literature study and data collection, preliminary design, planning of secondary structures, load analysis, modeling and analysis of the main structure, determination of prestressing forces, analysis of loss of prestressing forces, calculation of structural reinforcement, control of strength and stability, planning the lower structure, to the preparation of working drawings. The structural modeling and analysis are performed using the structural analysis program Midas Civil. The structural analysis is conducted in the segment installation stage and the service stage. The results of this planning include parapet design, dimensions of segmental box girders, cable coordinate and dimension design, placement and pillar design, as well as structural reinforcement design.
The tendons used in this bridge have specifications of VSL ASTM A 416-06 grade 270. Based on the box girder design, a total of 52 cantilever tendons with a 6-19-19 tendon type are required for the top slab of the box girder. Additionally, there are 34 service tendons with a 6-15-15 tendon type for the bottom slab of the middle span, and 18 service tendons with a 6-15-15 tendon type for the bottom slab of the edge span. The tendons are placed using POT bearing products from VSL, and the design was done independently. As for the pillar design, these pillars have a hollow structure with a width of 5 m, a length of 8.1 m, and a wall thickness of 1.5 m.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | beton pratekan, box girder, post-tensioned, balanced cantilever, prestressed concrete, internal prestress, precast segmental |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design T Technology > TA Engineering (General). Civil engineering (General) > TA683 Precast concrete construction. Prestressed concrete construction. T Technology > TG Bridge engineering > TG362 Box girder bridges--Design and construction. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25001-(S3) PhD Thesis |
| Depositing User: | Abdul Hafiz |
| Date Deposited: | 28 Jul 2023 14:09 |
| Last Modified: | 28 Jul 2023 21:12 |
| URI: | http://repository.its.ac.id/id/eprint/100384 |
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