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Ultimate strength analysis of jacket type offshore platforms due to wave, current and wind loading

Mirzadeh Niasar, J | 2008

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  1. Type of Document: Article
  2. DOI: 10.1115/OMAE2008-57797
  3. Publisher: 2008
  4. Abstract:
  5. As the result of safety factors considered in load and resistant values for the design of new offshore platforms, a higher resistance compared to the 100 year return period environmental loading, is achieved in the structure. This type of design is usually performed using linear methods of structural analysis. In this case the structure practically has a high reserve capacity which is disregarded in the design phase but may be considered in special cases. One of these important cases is when an existing structure is assessed and evaluated after elapse of its structural life. In this case using the platforms reserve capacity, through a non-linear analysis such as push-over, would be logical and economic. In this paper initially the factors affecting a platform non-linear analysis and methods for considering non-linear characteristics of structures will be discussed. Then the results of an investigation on the behavior of three Persian Gulf platforms due to wave loading using the non-linear push over analysis method of USFOS software are presented. Finally, the results of these analyses are compared with the API RP2A's assessment criteria [I]. Copyright © 2008 by ASME
  6. Keywords:
  7. Assessment criteria ; Design phase ; Environmental loadings ; Existing structure ; Jacket type offshore platform ; Linear methods ; Non-linear ; Nonlinear characteristics ; Off shore platforms ; Persian Gulf ; Push-over analysis ; Reserve capacity ; Return periods ; Ultimate strength analysis ; Wave loadings ; Wind loading ; Arctic engineering ; Design ; Drilling platforms ; Mechanics ; Offshore structures ; Safety factor ; Structural analysis ; Loading
  8. Source: Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, 15 June 2008 through 20 June 2008, Berlin ; Volume 1 , 2008 , Pages 779-786 ; 9780791848234 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/OMAE/proceedings/OMAE2008/48180/779/328548