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Application of Reliability Based Design and Assessment to Seismic Evaluations

[+] Author Affiliations
Maher Nessim, Nader Yoosef-Ghodsi, Shanshan Wang

C-FER Technologies, Edmonton, AB, Canada

Doug Honegger

D. G. Honegger Consulting, Arroyo Grande, CA

Joe Zhou

TransCanada Pipelines Limited, Calgary, AB, Canada

Paper No. IPC2010-31557, pp. 635-645; 11 pages
doi:10.1115/IPC2010-31557
From:
  • 2010 8th International Pipeline Conference
  • 2010 8th International Pipeline Conference, Volume 4
  • Calgary, Alberta, Canada, September 27–October 1, 2010
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4423-6 | eISBN: 978-0-7918-3885-3
  • Copyright © 2010 by ASME

abstract

The application of reliability based design and assessment (RBDA) as a basis for seismic evaluations of natural gas pipelines is explored through analysis of a number of representative pipeline examples. To accomplish this, a simplified approach was developed to generate a representative probability distribution of permanent ground deformations due to soil liquefaction. An idealized pipeline alignment through a liquefiable layer under a river was defined, and a number of cases representing NPS12 and NPS36 pipelines in classes 1, 2 and 3 were analyzed using a finite element model. The probability of exceeding the strain limits for pipe body and girth weld were calculated and compared to the reliability targets. The results were used to identify diameter and class combinations that can meet the reliability targets, and to make preliminary conclusions regarding the viability of using RBDA for seismic evaluations.

Copyright © 2010 by ASME
Topics: Reliability , Design

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