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Numerical evaluation of buried composite and steel pipe structures under the effects of gravity

  • Toh, William (Department of Mechanical Engineering, National University of Singapore) ;
  • Tan, Long Bin (Department of Mechanical Engineering, National University of Singapore) ;
  • Tse, Kwong Ming (Department of Mechanical Engineering, National University of Singapore) ;
  • Raju, Karthikayen (Department of Mechanical Engineering, National University of Singapore) ;
  • Lee, Heow Pueh (Department of Mechanical Engineering, National University of Singapore) ;
  • Tan, Vincent Beng Chye (Department of Mechanical Engineering, National University of Singapore)
  • Received : 2017.06.30
  • Accepted : 2017.09.25
  • Published : 2018.01.10

Abstract

In this paper, the response of an underground fibreglass reinforced plastic (FRP) composite pipe system subjected to realistic loading scenarios that may be experienced by an actual buried pipeline is investigated. The model replicates an arbitrary site with a length of buried pipeline, passing through a $90^{\circ}$ bend and into a valve pit. Various loading conditions, which include effects of pipe pressurization, differences in response between stainless steel and fibreglass composite pipes and severe loss of bed-soil support are studied. In addition to pipe response, the resulting soil stresses and ground settlement are also analysed. Furthermore, the locations of potential leakage and burst have also been identified by evaluating the contact pressures at the joints and by comparing stresses to the pipe hoop and axial failure strengths.

Keywords

Acknowledgement

Supported by : Defence Science and Technology Agency (DSTA)

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