Deviany, Made Ayu Delvina (2018) Analisis Kekuatan Sisa pada Bangunan Lepas Pantai Terpancang Yang Terkorosi. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
04311440000140_Undergraduate Thesis.pdf - Accepted Version Download (2MB) | Preview |
Abstract
Dalam assessment existing platform, salah satu hal yang harus diperhitungkan adalah adanya korosi pada struktur tersebut. Salah satu korosi yang terjadi pada struktur lepas pantai adalah terjadinya degradasi pada dinding member. Korosi berpengaruh terhadap ketebalan dinding struktur, dimana ketebalan dinding struktur ini akan berpengaruh terhadap umur kelelahan struktur dan kekuatan sisa dari struktur tersebut. Pada analisa kali ini akan dibahas dampak korosi terhadap kekuatan sisa struktur. Korosi dimodelkan sebagai degradasi wall thickness dimana laju korosi yang terjadi adalah 0.45 mm/tahun. Analisis ini dilakukan dengan menghitung umur kelelahan struktur selama 3 tahun setelah dilakukan inspeksi pada struktur, serta permodelan jika struktur telah diberikan doubling plate setelah dilakukan inspeksi. Dari hasil analisis didapatkan bagaimana pengaruh korosi terhadap struktur secara beban dinamis, kekuatan sisa, dan umur kelelahan. Pada analisa ini didapatkan hasil nilai rasio kekuatan sisa terkecil adalah 2.962 pada struktur dengan arah pembebanan 0o dan kondisi struktur telah mengalami korosi 3 tahun setelah dilakukan inspeksi. Kemudian, dari analisa diketahui bahwa umur kelelahan paling kecil, yaitu 3.08 tahun terjadi pada kondisi 3 tahun setelah dilakukan inspeksi.
=======================================================================================================================================
In the existing assessment platform, one of the things that must be taken into account is the presence of corrosion on the structure. One of the corrosion that occurs in offshore structures is the degradation of wall thickness. Corrosion effect on the thickness of the wall of the structure, where the thickness of the wall of this structure will affect the fatigue life of the structure and the residual strength of the structure. In this analysis, it will be discussed the impact of corrosion on the strength of the remaining structures. The corrosion is modeled as wall thickness degradation where the corrosion rate is 0.45 mm / year. This analysis is done by calculating the structure fatigue life for 3 years after inspection on the structure, and modeling if the structure has been given doubling plate after inspection. From the analysis results obtained how the effect of corrosion on the structure by dynamic load, residual strength, and fatigue life. In this analysis, the result of the smallest residual strength ratio value is 2,962 in the structure with the load direction 0 degree and the structure condition has been corrosion 3 years after the inspection. Then, from the analysis it is known that the smallest fatigue life, which is 3.08 years,occurred in condition 3 years after the inspection.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Kekuatan Sisa, Umur Kelelahan, Korosi |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Made Ayu Delvina Deviany |
| Date Deposited: | 21 Jun 2021 01:54 |
| Last Modified: | 21 Jun 2021 01:54 |
| URI: | http://repository.its.ac.id/id/eprint/54128 |
Actions (login required)
 |
View Item |