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All Journal Journal of Applied Sciences, Management and Engineering Technology (JASMET) Journal of Materials Exploration and Findings
Herucakra, Wira
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Marine Growth Rate Prediction of Wellhead Offshore Platform Kadhafi, Muammar; Herucakra, Wira; Abdullah, Sholeh Khuddin; Putra, Wahyu Suryo
Journal of Applied Sciences, Management and Engineering Technology Vol 5, No 1 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2024.v5i1.6038

Abstract

Marine growth, though a straightforward issue, which is can lead the significant problems for marine structures such as wellhead jacket platforms. The survey was conducted to measure the thickness of marine growth from the splash zone downward to the seabed elevation of the jacket platform. The growth rate was calculated and predicted for 10 years from initial conditions, while the initial conditions were set 3 years after the operation started. The result indicated that the prediction thickness exceeded the allowable thickness at 5 years start from the initial condition. The results of these measurements and predictions can be used for management policy-making and followed up with an assessment of the effects of marine growth on structural performance such as seismic and structural fatigue analysis.
Ultimate Limit State Reliability-Based Approach Life Prediction of an Existing Frame Structure Under Seismic Hazard in Indonesia Herucakra, Wira; Adnyani, Luh Putri
Journal of Materials Exploration and Findings Vol. 4, No. 1
Publisher : UI Scholars Hub

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Abstract

Life assessment integrated with Structural Integrity Management (SIM) has been implemented in the oil and gas industry for the past decade to maintain the integrity and safety of an in-service structure used to support hydrocarbon exploration, production, and processing activity. Current structural life assessment, as ruled by the American Petroleum Institute (API), uses a fatigue-based approach for offshore structures subjected to wave loading. As the general principle of SIM is not limited to offshore structures, this study offers an alternative life assessment method for onshore structures, especially steel frame structures subjected to earthquake loads. Reliability analysis, combined with the effect of the time-related degradation mechanism of steel structure due to corrosion and mechanical damage, with non-linear structural analysis, produces comprehensive ultimate limit state behaviour and performance of an existing structure. A steel frame structure located in Indonesia was evaluated in this study, with the reference base shear developed based on the latest Indonesian Seismic Provision SNI 1726-2019; the life of the structure was estimated by determining the time interval required for the overstrength factor produced from the pushover analysis to approximate 1.0. The assessment demonstrated that the life of the existing structure exceeds its design life and is safe for operation.
Co-Authors Abdullah, Sholeh Khuddin Luh Putri Adnyani Muammar Kadhafi Putra, Wahyu Suryo