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All Journal Jurnal Fisika Unand Jurnal Jalan Jembatan
Triwibowo, Hari
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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EVALUASI PERFORMA JEMBATAN GANTUNG TIPE SUSPENDED PEJALAN KAKI DENGAN LANTAI KACA BERDASARKAN UJI PEMBEBANAN STATIS Nugraha, Widi; Subrata, Budi; Permadi, Indra Sidik; Sukmara, Gatot; Chairulloh, Achmad Riza; Triwibowo, Hari; Saripudin, Umar
Jurnal Jalan Jembatan Vol 40 No 1 (2023)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58499/jatan.v40i1.1163

Abstract

The Glass Bridge of Bromo is a suspended type of footbridge with a structural glass floor that was built by the Ministry of Public Works and Public Housing in the Bromo Tengger Semeru National Park, East Java, Indonesia. The bridge was built to provide a unique experience for visitors by allowing them to enjoy the beautiful scenery around Mount Bromo from the transparent floor of the bridge. The use of structural glass as a bridge floor needs to be tested for safety and comfort aspects by testing the load on the structural glass floor segment and the entire bridge structure. Load testing aims to determine whether the bridge is capable of withstanding the load that will pass over it, in this case, pedestrian load. In this study, load testing was carried out on the Glass Bridge of Bromo with an operational planned load of around 100 pedestrians. The load was converted to 240 sandbags with a weight of approximately 35 kg each. The maximum bridge response due to the largest test load was a vertical deformation of 72.70 mm over the entire span, maximum cable force of 19.84 tons, and steel frame stress of the glass floor system of 125.96 MPa. The structural response due to the measured load was well-modeled using the structure model used in this study, allowing for simulation of larger loads for service load evaluation. The analysis results show that the Glass Bridge of Bromo is safe to use with a service load restriction of up to 400 kg/m2. Additionally, the bridge has relatively small deformations compared to the allowable deformation, thus meeting comfort criteria.
STUDI EKSPERIMENTAL PERILAKU STRUKTURAL LANTAI KACA LAMINASI TERHADAP BEBAN LENTUR Nugraha, Widi; Triwibowo, Hari; Subrata, Budi
Jurnal Jalan Jembatan Vol 41 No 1 (2024)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58499/jatan.v41i1.1286

Abstract

The development of laminated glass with enhanced ductility compared to standard glass presents promising opportunities for its utilization as load-bearing structural components, notably in floors and beams. Its application as bridge flooring has gained widespread acceptance across construction projects worldwide. Despite this, understanding laminated glass floor behavior remains limited due to its recent emergence in the construction sector. This study aims to investigate the structural response of laminated glass floors to vertical bending loads through bending tests conducted in a laboratory setting. Four samples were tested, including three with two layers of laminated glass and one with three layers, all using the same thickness of glass and interlayer, which is 12 mm and 1.5 mm, respectively. Vertical compressive loads were applied at the floor span center, with deformation measured incrementally. Test results show that all laminated glass floor specimens can withstand loads greater than the design load, with ductility reaching up to 2,23, showcasing post-failure ductile behavior and gradual bending failure conducive to safe evacuation. These findings significantly advance our comprehension of laminated glass in bridge construction, paving the way for innovative structural designs. Keywords: laminated glass, structural floor, bending test, ductility, stiffness
Kajian Distribusi Waktu Efektif Lepas Landas di Bandara Internasional Sultan Hasanuddin Makassar Triwibowo, Hari; Jasruddin, Jasruddin; Arsyad, Muhammad
Jurnal Fisika Unand Vol 11 No 4 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.11.4.531-541.2022

Abstract

Kajian distribusi waktu efektif lepas landas di bandara internasional sultan hasanuddin makassar dilakukan dengan tujuan; 1) menganalisisis rata-rata gaya angkat pesawat boeing B737 MG dan pesawat airbus A320 2) menganalisis korelasi tekanan, temperatur, titik embun terhadap gaya angkat pesawat boeing B737 MG dan pesawat airbus A320 3) menganalisis kecenderungan perubahan tekanan, temperatur dan titik embun terhadap gaya angkat pesawat boeing B737 MG dan pesawat airbus A320 4) menganalisis pengaruh temperatur terhadap waktu efektif lepas landas bagi pesawat boeing B737 MG dan pesawat airbus A320. Data yang digunakan adalah data metar tahun 2016-2020 yang memuat informasi waktu, tekanan, temperatur dan titik embun. Hasil yang diperoleh menunjukkan; 1) Rata-rata gaya angkat mengalami penurunan setelah bulan Juli dan meningkat pada bulan Desember. 2) Korelasi antara temperatur udara dan gaya angkat berada pada rentang (-0.60) – (-1.00). Korelasi antara tekanan udara dan gaya angkat berada pada rentang 0.00-0.399. Korelasi antara titik embun dan gaya angkat berada pada rentang -0.599 – 0.399. 3) Kecenderungan perubahan temperatur dengan gaya angkat menunjukkan hubungan yang berbanding terbalik sedangkan kecenderungan perubahan tekanan dan titik embun terhadap gaya angkat menunjukkan hubungan yang tidak langsung. 4) Peningkatan temperatur membutuhkan gaya angkat yang lebih kecil demikian pula sebaliknya
Co-Authors Chairulloh, Achmad Riza Gatot Sukmara, Gatot Jasruddin Daud Malago Muhammad Arsyad Permadi, Indra Sidik Saripudin, Umar Subrata, Budi Widi Nugraha, Widi