Wiliyanti, Ilvy (2018) Pengaruh Bahan Isolasi Getaran terhadap Pola Lendutan Jembatan Rel Kereta Api dalam Tinjauan Elemen Hingga. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kereta api sebagai transportasi darat komparatif yang berjalan di atas rel sebagai infrastruktur perjalanannya. Kereta api memiliki daya dorong kuat dan mampu memberikan getaran besar yang berpengaruh pada jembatan. Sehingga, perlu diberikan isolasi getaran untuk peredam getaran yang dipasang di antara rel kereta dan beam di bawahnya. Tugas akhir ini dilakukan di jembatan Lahor, Malang dengan variasi massa dan kecepatan kereta api terhadap 8 jenis bahan isolasi getaran yaitu metal dan elastomer. Tujuannya untuk mencari pola lendutan dan parameter bahan terbaik sebagai peredam getaran akibat beban berjalan. Lendutan maksimum tanpa isolasi getaran pada kereta Malabar kosong sebesar 0,187 m; Malabar penuh 0,196 m; Penataran kosong 0,152 m; Penataran penuh 0,169 m. Sementara, bahan isolasi getaran yang direkomendasikan yaitu Steel-Rubber-Steel karena memiliki nilai kekakuan tinggi setelah bahan murni yaitu 3,85.107 N/m dan lendutan yang kecil. Pemberian bahan isolasi getaran Steel-Rubber-Steel jika dibandingkan dengan jembatan tanpa isolator getaran, mampu mereduksi lendutan maksimum sebesar 25% untuk Malabar kosong; 26% untuk Malabar penuh; 21% untuk Penataran kosong; dan 23% untuk Penataran penuh. Berdasarkan Peraturan Menteri Nomor 60 Th 2012, semua variasi yang diujikan memenuhi standar lendutan yaitu kurang dari 0,228 m. Perambatan getaran terbesar pada isolator lapisan pertama di node 1 yaitu 74,20%; node 2 sebesar 76,24%; node 3 sebesar 78,62%. Semakin ke struktur bawah, perambatan getaran semakin kecil.
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The railway as a comparative land transportation that runs on the rails as its road infrastructure. The train has a strong thrust and is able to provide a large vibration that affects the condition of the rail bridge being bypassed. Thus, it is necessary to provide a vibration isolation structure for the damped vibration placed between the rail and beam. This research was conducted at Lahor railway bridge Malang with variation of mass and railway speed to 8 types of material that is metal and mixture of elastomer. The goal is to find the ideal deflection pattern and the best material parameters as the vibration damper from the effect dinamic load. Maximum deflection without vibration isolation on empty Malabar trains of 0.187 m; Malabar full 0.196 m; empty Penataran 0.152m; and full Penataran is 0.169 m. Then, the recommended vibration insulation material is Steel-Rubber-Steel because it has high stiffness value after the pure material is 38499802,37 N / m and a small deflection. Giving of Steel-Rubber-Steel vibration insulation when compared to bridge without vibration isolator, capable of reducing maximum deflection 25% for empty Malabar; 26% for full Malabar; 21% for empty Penataran; and 23% for full Penataran. Based on Ministerial Regulation No. 60 Year 2012, all variations tested meet the deflection standard of less than 0.228 m. The largest vibration propagation in first layer isolator in node 1 is 74.20%; node 2 is 76.24%; node 3 is 78.62%. As the structure goes down, the vibration propagation gets smaller.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | jembatan rel, isolasi getaran, lendutan, perambatan getaran |
| Subjects: | T Technology > TF Railroad engineering and operation T Technology > TF Railroad engineering and operation > TF270 Railway structures and buildings T Technology > TG Bridge engineering |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Ilvy Wiliyanti |
| Date Deposited: | 25 Jun 2021 10:51 |
| Last Modified: | 25 Jun 2021 10:51 |
| URI: | http://repository.its.ac.id/id/eprint/55361 |
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