Safar, Chairul Hazmi (2025) Analisis Kekuatan Struktur Modifikasi Tongkang Menjadi Jemabatan Apung. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini mengkaji performa struktural hasil modifikasi tongkang (barge) menjadi jembatan apung dengan penambahan rampdoor, menggunakan pendekatan numerik berbasis Finite Element Method (FEM). Tujuan utama studi ini adalah mengevaluasi distribusi tegangan dan deformasi pada struktur utama, khususnya pada area kritis sambungan antara rampdoor dan geladak, akibat perubahan pola pembebanan dari beban kapal konvensional ke beban kendaraan darat. Model struktur dimodelkan secara presisi berdasarkan data geometrik dan material aktual, kemudian dianalisis secara statis dalam dua skenario pembebanan. Hasil simulasi pada skenario pembebanan pertama menunjukkan bahwa sebagian besar elemen struktur mengalami tegangan di bawah batas yield material A36 (250 MPa), mengindikasikan bahwa geladak utama masih beroperasi dalam zona elastis. Namun, konsentrasi tegangan maksimum sebesar 236,04 MPa terdeteksi pada area sambungan rampdoor, mendekati batas izin desain, sehingga mengindikasikan adanya potensi kegagalan lokal bila tidak dilakukan penguatan. Kondisi ini menunjukkan bahwa modifikasi rampdoor menjadi titik kritis struktural yang memerlukan optimasi lebih lanjut. Studi ini merekomendasikan peninjauan ulang desain lokal serta penguatan struktural pada sambungan rampdoor untuk meningkatkan faktor keselamatan jangka panjang. Selain itu, hasil ini membuka peluang untuk pengembangan kajian lanjutan terkait analisis kelelahan fatigue, dampak lingkungan terhadap performa struktural, serta validasi eksperimental untuk meningkatkan akurasi dan keandalan desain. Secara keseluruhan, solusi modifikasi ini menunjukkan potensi sebagai alternatif infrastruktur apung yang adaptif, efisien, dan berkelanjutan, khususnya di wilayah terpencil yang memerlukan konektivitas transportasi dengan biaya rendah dan fleksibilitas tinggi.
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This study investigates the structural performance of a modified barge repurposed as a floating bridge with the addition of a ramp door, using a numerical approach based on the Finite Element Method (FEM). The primary objective is to evaluate the distribution of equivalent stress (von Mises stress) and deformation on the main structural components, with particular focus on the critical joint area between the ramp door and the deck, as a response to the change in loading pattern from marine loads to vehicular loads. The barge structure was modeled with high accuracy based on actual geometric and material data and subjected to static analysis under two realistic loading scenarios. The simulation results for the first loading scenario indicate that most structural elements experience stress levels below the yield strength of A36 steel (250 MPa), suggesting that the main deck operates within the elastic range. However, a peak stress concentration of 236.04 MPa was identified at the ramp door connection area, approaching the allowable design limit and indicating a potential risk of local failure without additional structural reinforcement. This finding highlights the ramp door connection as a structural weak point that requires further design optimization.The study recommends local structural enhancement and design revision in the ramp door joint area to ensure long-term safety. Furthermore, the results provide a basis for future investigations involving fatigue analysis, environmental impact on structural integrity, and experimental validation to improve design reliability. Overall, this modified barge concept demonstrates strong potential as an adaptive, cost-effective, and sustainable floating infrastructure solution, particularly suited for remote areas with limited transportation access.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | floating bridge, barge modification, FEM, von-Mises stress, rampdoor. jembatan apung, modifikasi tongkang, FEM, tegangan von-Mises, rampdoor. |
Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture |
Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis |
Depositing User: | Chairul Hazmi Safar |
Date Deposited: | 04 Aug 2025 08:38 |
Last Modified: | 04 Aug 2025 08:38 |
URI: | http://repository.its.ac.id/id/eprint/126018 |
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