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Comparison on usefulness of two buried pipeline retrofitting methods in earthquake induced landslides with numerical modeling

Jafarzadeh, F ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. Publisher: Taylor and Francis - Balkema , 2015
  3. Abstract:
  4. Landslides have disastrous influence on buried pipeline operation. In order to overcome this phenomenon, many retrofitting solutions have been proposed in literature and practice. This paper concentrates on the solutions which deal with pipe thickness change and rerouting method. As an answer to this,ABAQUS FE program has been used for numerical modeling. Soil-pipe interaction was modeled as hard and frictional contact in normal and tangential directions respectively. Typical geotechnical parameters of Tehran soil and predicted acceleration time history, compatible with Tehran geological condition, have been introduced to program for numerical calculations. Usefulness of two basic proposed solutions had been compared. Results reveal that increasing pipe thickness drastically lower the pipe's response under dynamic slope deformation as expected. In addition, where the pipe thickness increase is impractical, rerouting the pipeline can be an appropriate alternative for safe passage of pipe system. Also, crossing the pipe from a safer zone, having higher strength material, can guarantee the safe passage
  5. Keywords:
  6. ABAQUS ; Geomechanics ; Landslides ; Numerical models ; Pipelines ; Retrofitting ; Strength of materials ; Acceleration-time history ; Earthquake-induced landslides ; Geological conditions ; Geotechnical parameters ; Higher-strength materials ; Numerical calculation ; Soil-pipe interaction ; Tangential directions ; Computer simulation
  7. Source: Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014, 22 September 2014 through 25 September 2014 ; September , 2015 , Pages 1071-1076 ; 9781138001480 (ISBN)
  8. URL: http://www.crcnetbase.com/doi/abs/10.1201/b17435-187