DESAIN DAN ANALISIS KEHANDALAN STRUKTUR ANJUNGAN LEPAS PANTAI TIPE JACKET TRIPOD DI PERAIRAN SELAT MAKASSAR
Muhammad Arkaan Ah’naf1 dan Prof. Dr. Ir. Ricky Lukman Tawekal2
Program Studi Teknik Kelautan
Fakultas Teknik Sipil dan Lingkungan, Institut Teknologi Bandung,
Jl Ganesha 10 Bandung 40132
1arkaanahnaf@students.itb.ac.id dan 2ricky@ocean.itb.ac.id
ABSTRACT: Indonesia is a maritime country that is rich in natural resources, for example oil and natural gas which are very important for human activities. Therefore, an offshore platform structure is needed for oil and gas exploration needs. One type of offshore platform is fixed jacket platform. In this final project, modelling and reliability analysis for the structure of a three legged offshore platform jacket type using SACS software. Prior to the reliability analysis, the structure must meet the criteria for in-place, seismic and spectral fatigue analysis. All of these analyzes were carried out according to the API RP-2A WSD standard code. Reliability analysis is carried out because there are many uncertainties in parameter in designing structure, for example, environmental loads whose values are always changing. In this final project, reliability analysis was carried out based on the base shear value obtained from the pushover analysis. The calculation of reliability analysis in this Final Project uses FORM 2 with performance function that is influenced by random variables of yield strength, wave height and current velocity. The result of reliability analysis in the form of a reliability index value. The reliability index obtained is 4.869 with probability of failure 0.000000566. This reliability index value has met the target of high safety class when referring to Bai and Jin, which is 3.72 for the high safety target.
Kata Kunci: Struktur Jacket, In-place, Seismic, Spectral Fatigue, Pushover, Kehandalan, FORM 2.
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