Analisis Non-Linear Pushover pada Struktur Platform Jacket yang Mengalami Kerusakan Akibat Korosi

Asykur, Asykur (2019) Analisis Non-Linear Pushover pada Struktur Platform Jacket yang Mengalami Kerusakan Akibat Korosi. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam penelitan ini dibahas mengenai respon struktur bangunan lepas pantai dengan struktur jacket tetap terhadap beban ekstrem gelombang maupun angin. Fokus utama dari penelitian ini adalah bagaimana ketahanan bagian stuktur yang terkena korosi terhadap beban yang diberikan. Analisis yang digunakan adalah analisis pushover non-linear yaitu dengan cara memberikan beban lateral secara terus menerus hingga stuktur tersebut mencapai kondisi plastis dan mengalami kegagalan struktur/failure. Semua bagian struktur dimodelkan menggunakan elemen 2 dimensi dan bagian yang terkena korosi dimodelkan lebih detail sesuai bentuk dan ukurannya. Ketahanan stuktur terhadap beban ekstrem direpresentasikan dalam Reserve Strength Ratio (RSR). Hasil analysis menunjukkan terjadi penurunan kekuatan struktur dengan prosentase RSR maksimum 17.23% pada daerah korosi dan 86.3% pada sambungan tubular di sekitar bagian korosi. Untuk analisis ini menggunakan perangkat lunak FEM Altair Hyperworks, dimana untuk pembuatan model menggunakan Hypermesh dan untuk analisis non-linear pushover menggunakan solver Optistruct.
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The response of a fixed offshore platform subjected to extreme wind and wave loading (lateral loads) conditions is studied. The main subject of this research is the strength capacity of the corroded structure under applied loads. The non-linear static pushover analysis was used by applying an incremental lateral load until the structure was getting failure. All parts of the tubular structure were modeled using 2D shell element, and the corroded areas were modeled accurately based on their shape and size. The strength capacity of the structure under extreme loads is presented by Reserve Strength Ratio (RSR). The analysis results show a decrease in structural strength with a maximum RSR percentage of 17.23% in the corrosion area and 86.3% in the tubular joint around the corrosion section. The analysis in this study is carried out using the finite element software Altair Hyperworks, which Hypermesh was used for structural modeling and the non-linear static pushover analysis was done using Optistruct solver.

Item Type:	Thesis (Masters)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Asykur Asykur
Date Deposited:	23 Jul 2026 01:16
Last Modified:	23 Jul 2026 01:16
URI:	http://repository.its.ac.id/id/eprint/72478

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