Seismic performance assessment of fixed offshore structures by endurance time method

Dastan Diznab, M. A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/17445302.2018.1554325
  3. Publisher: Taylor and Francis Ltd , 2019
  4. Abstract:
  5. The aim of this paper is to consider the ability of endurance time (ET) method to estimate the seismic response of fixed offshore platforms at various excitation levels. In this way, various sources of nonlinear behaviour and challenging issues in the ET approach are included in the three-dimensional model of a real jacket platform utilising the finite element method. In addition to common-designed, over-designed and under-designed cases of this platform have been investigated to examine the effects of the structural characteristics on the ET response. To consider the accuracy and reliability of this approach, results of the ET method are compared with results of nonlinear time history analysis (THA) and response spectrum analysis (RSA) methods at different excitation levels. It is shown that the ET method can predict the seismic performance of the offshore structures with both small computational efforts and reasonable accuracy. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group
  6. Keywords:
  7. Endurance time method ; Earthquake engineering ; Nonlinear analysis ; Offshore oil well production ; Production platforms ; Reliability analysis ; Seismic waves ; Seismology ; Spectrum analysis ; Endurance time methods ; Fixed offshore platforms ; Fixed offshore structures ; Nonlinear time history analysis ; Response spectrum analyses (RSA) ; Seismic performance assessment ; Structural characteristics ; Three-dimensional model ; Fixed platforms
  8. Source: Ships and Offshore Structures ; Volume 14, Issue 7 , 2019 , Pages 709-722 ; 17445302 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/17445302.2018.1554325?journalCode=tsos20