SEAFASTENING DESIGN AND BARGE STABILITY DURING LOADOUT AND TRANSPORTATION OF JACKET STRUCTURE

• Main Author: Habibullah Putra Rifa'i, Fauzan
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/80782
• Institution: Institut Teknologi Bandung

Offshore platform loadout and transportation analysis is included in the pre-service analysis, which is the analysis before the offshore platform operates in the offshore. In the loadout process, barge ballasting analysis, barge stability, and longitudinal strength analysis of the barge are carried out. Ballasting barge is carried out to keep the top elevation of the barge the same as the dock elevation by calculating the load due to tides and load during load transfer using vessel design software. The barge stability analysis is carried out using vessel design software to obtain the value of the stability degree range of the barge, the output of the analysis is a stability curve. All parameters examined must meet the standards set out in GL Nobel Denton 0013 - Guidelines for Loadouts and GL Noble Denton 0030 - Guidelines for Marine Transportation. Longitudinal strength analysis of the barge is carried out using vessel design software by calculating the bending moment and shear force of the barge which must be adjusted so as not to exceed the capacity of the bending moment and shear force in accordance with the criteria in BKI Vol. II - Rules of Hull. Furthermore, in the transportation analysis, an analysis is carried out to obtain a seafastening design that can withstand a combination of static loads, namely the load of the jacket structure with dynamic loads, namely loads due to wind and inertia using offshore platform design software. All members are checked to obtain a unity check (UC) value of less than 1, and seafastening joints are also checked. Finally, the skidbeam as a structural track must be designed to meet the design criteria as per AISC 360-16 Specification for Structural Steel Buildings.