SEAFASTENING AND BARGE STABILITY DESIGN FOR LOAD OUT AND TRANSPORTATION OF TOPSIDE STRUCTURES
Load out and transportation of offshore platforms is an important process in oil and gas exploration. Load out and transportation are part of pre-service analysis, which is a process where a platform has not yet entered its operational period. In the structural load out process, barge ballasting des...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/77532 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Load out and transportation of offshore platforms is an important process in oil and gas exploration. Load out and transportation are part of pre-service analysis, which is a process where a platform has not yet entered its operational period. In the structural load out process, barge ballasting design, barge stability analysis, and barge longitudinal strength analysis are carried out. In the barge ballasting design, all loads on the barge are taken into account, the ballast compartment is filled or emptied to compensate for the load on the barge so that the barge remains in the same elevation as the jetty. In the stability analysis, the stability curve of the barge will be examined which contains the stability range, the ratio of the area under the curve, and the initial GM value. All parameters examined in the stability analysis must meet the criteria in GL Nobel Denton 0013 - Guidelines for Loadouts and GL Nobel Denton 0030 - Guidelines for Marine Transportation. In the longitudinal strength analysis of the barge, the shear force capacity and bending moment of the barge for still water and vertical waves are checked in accordance with the criteria of BKI (Vol.II) - Rules for Hull. The actual shear force and bending moment must be less than the capacity of the barge. For the transportation process, seafastening and deck support frame (DSF) are designed to support the structure while on the barge. The load received by the structure must be able to be resisted with the help of seafastening and DSF, the load received during the transportation process is a combination of static and dynamic loads. In seafastening and DSF, member and joint can be checked, the stress value in the member and joint must meet the specified criteria. Skidbeam as a structural track must also have the capacity to withstand the load of the structure above it, the calculation of skidbeam capacity is based on ANSI / AISC 360-16 Specification for Structural Steel Buildings.
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