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Performance of Jacket Platform Equipped with BRB (Buckling Restrained Brace) under Earthquake and Wave Loads

Partovi Koloor, Valiollah | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45613 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Golafshani, Ali Akbar; Tabeshpour, Mohamad Reza
  7. Abstract:
  8. Offshore platforms are one of the most important structures in oil-rich countries, so that their economic benefit makes it very expensive to stop their usage. Therefore, it is essential that their performance is not disrupted by earthquake or the tidal waves made by severe storms. In the conventional bracing systems, it is assumed that the braces buckle under compressive forces; but Buckling Restrained Brace (BRB) does not buckle under pressure. In this study performance of BRB in jacket platform, with a case study of Resalat platform, has been investigated under earthquake load and powerful wave. The modeling of jacket equipped with this brace has been done in Abaqus software, and results have been compared with responses of jacket with conventional bracing frame (CBF). To do this study, results of nonlinear dynamic analysis, in both conventional and equipped with BRB jacket platform, under various earthquake records and extreme sea state wave force, have been investigated and compared. Based on the analysis, buckling restrained brace reduces stress at the connections, which may increase the fatigue life of the connections. In addition, the results show that jacket equipped with BRB system has a lower dynamic response than conventional jacket in extreme earthquakes
  9. Keywords:
  10. Nonlinear Dynamic Analysis ; Jacket Platform ; Buckling Restrained Braces Frame (BRBF)System ; Wave Loading ; Retrofiting ; Dynamic Loads ; Earthquake Load

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