Modifikasi Jembatan Kali Legi (Blitar) Menggunakan Sistem Cable Stayed dan Box Girder Pratekan

Hutapea, Heng Kandito (2025) Modifikasi Jembatan Kali Legi (Blitar) Menggunakan Sistem Cable Stayed dan Box Girder Pratekan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jembatan merupakan elemen vital dalam infrastruktur yang mendukung berbagai aspek kehidupan, seperti ekonomi, sosial, dan pembangunan daerah. Keberadaan jembatan sangat penting untuk memfasilitasi mobilitas manusia, barang, dan informasi, serta menjembatani rintangan yang ada di berbagai medan, seperti lembah, sungai, atau jalan raya. Jembatan Kali Legi menggunakan sistem gelagar beton prategang dengan total panjang 325 meter, yang memiliki tujuh bentang dan enam pilar penopang. Namun, penggunaan banyak pilar dalam desain ini mengakibatkan terganggunya pergerakan air di bawah jembatan dan nilai estetika yang kurang menarik. Hasil modifikasi jembatan berupa jembatan cable stayed dengan bentang total 325 meter yang terbagi atas 195 meter mainspan dan 130 meter sidespan. Susunan kabel yang digunakan adalah tipe semi harp pattern, dengan jarak antar kabel pada gelagar adalah 8 meter. Pylon direncanakan dengan tinggi 76 meter dari permukaan lantai kendaraan dengan bentuk diamond tower dengan dimensi 8000 mm x 3000 mm. Gelagar pada jembatan ini menggunakan box girder berbentuk trapezoidal dengan tebal flange atas 300 mm, tebal flange bawah 400 mm, dan tebal web 400 mm. Jembatan direncakanan dengan menggunakan metode cantilever. Pengerjaan tugas akhir ini menggunakan program bantu MIDAS CIVIL 2024, SAP2000 dan Autocad. Selanjutnya dilanjutkan perhitungan penulangan box, kontrol lendutan, kontrol momen retak, kontrol momen batas, kontrol torsi, serta stabilitas aerodinamis yang melupti kontrol terhadap frekuensi alami, efek flutter dan juga vortex-shedding. Hasil yang diperoleh dari perencanaan ini berupa penulangan struktur, kebutuhan kabel, kebutuhan tendon prategang pada gelagar dan sebagainya yang disajikan dalam bentuk gambar teknik.
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Bridges are vital elements of infrastructure that support various aspects of life, including economic growth, social development, and regional advancement. The presence of a bridge is essential to facilitate the mobility of people, goods, and information, as well as to overcome obstacles across different terrains such as valleys, rivers, and highways. The original design of the Kali Legi Bridge utilized a prestressed concrete girder system with a total length of 325 meters, consisting of seven spans supported by six piers. However, the use of many piers in this design disrupted water flow beneath the bridge and negatively impacted its aesthetic appeal. The modified design transforms the bridge into a cable-stayed bridge with the same total length of 325 meters, divided into a 195-meter main span and a 130-meter side span. The cable arrangement follows a semi-harp pattern, with an 8-meter spacing between stay cables along the girder. The pylon is designed to be 76 meters high from the deck surface, adopting a diamond tower shape with dimensions of 8000 mm × 3000 mm. The bridge girder is a trapezoidal box girder with a top flange thickness of 300 mm, bottom flange thickness of 400 mm, and web thickness of 400 mm. The bridge construction employs the cantilever method. This final project is supported by software tools including MIDAS CIVIL 2024, SAP2000, and AutoCAD. Further calculations include reinforcement design for the box girder, deflection control, cracking moment check, ultimate moment check, torsion check, and aerodynamic stability assessments covering natural frequency, flutter effect, and vortex shedding. The outcomes of this planning process include structural reinforcement details, stay cable requirements, prestressing tendon requirements for the girder, and other related components, all presented in the form of technical drawings.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	modifikasi, jembatan, pilar, cable stayed, box girder, modification, bridge, pillars, cable stayed, box girders
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	HENG KANDITO HUTAPEA
Date Deposited:	28 Jul 2025 03:53
Last Modified:	28 Jul 2025 03:53
URI:	http://repository.its.ac.id/id/eprint/121870

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