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Structural Stability of Offshore Platforms

Saiedi, Mohammad Reza (2007) Structural Stability of Offshore Platforms. Universiti teknologi petronas. (Unpublished)

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Abstract

Given the hostile nature of offshore environments, ensuring the structural stability of offshore structures is vital to their design. Acomputer program was developed for the preliminary stability analysis ofoffshore platforms under major environmental loads. The program output was interpreted for a minimum facility platform under extreme storm conditions. Also, athorough framework was set for experimental studies ofthe platform's stability using a scaled physical model. Literature review started with gathering general background information on offshore platforms. This included identifying their various types, their numbers worldwide and their construction. Next, structural stability of offshore platforms was studied in terms of the various loads exerted on offshore rigs and methods for their structural analysis. Finally, arecently installed Minimum Facility Platform was examined as an introduction to the case study structure. The platform chosen as case study for the project was ahypothetical Braced Caisson structure located at 36m of water in the North Sea. Its conceptual design and reliability assessment under extreme storm conditions were reviewed. Acomputer program was developed to calculate total base shear resulting from winds, waves and currents. The program was run for the case study platform under extreme storm conditions and results were interpreted. The breakdown of base shear by environmental loads and structural members was studied. Valuable insights were aninfr? into thp qpn^itivlfv rvf*n1ot6 •1 u:i:.. . . .: . i I The framework was defined for scale model experiments of the case study platform to assess its structural stability. Conducting the experiments by others would then be possible. The author built a model ofthe case study platform scaled down at 1:110. A hydraulic flume would then replicate storm conditions at the platform site. Expenmental setup and procedures were thoroughly specified. Procedures for measurement using a strain gauge were identified. Finally, steps to correlate results with platform stability were established.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Structures, materials and construction
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 24 Oct 2013 09:13
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/9551

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