Numerical modeling of buried HDPE pipelines subjected to normal faulting; a case study

A systematic study is presented herein on the seismic response of buried pipelines subjected to ground fault rupture in the form of normal faulting. In this study, advanced computational simulations are conducted in parallel with physical testing using a geotechnical centrifuge. For the numerical si...

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Bibliographic Details
Published in:Earthquake spectra 2013-05, Vol.29 (2), p.609-632
Main Authors: Xie, Xiaojian, Symans, Michael D, O'Rourke, Michael J, Abdoun, Tarek H, O'Rourke, Thomas D, Palmer, Michael C, Stewart, Harry E
Format: Article
Language:English
Subjects:
bearing capacity
case studies
depth
Earth sciences
Earth, ocean, space
earthquakes
Earthquakes, seismology
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
fault planes
faults
finite element analysis
foot wall
hanging wall
Internal geophysics
Natural hazards: prediction, damages, etc
normal faults
numerical analysis
numerical models
pipelines
rupture
seismic response
Seismology
simulation
soil-structure interface
strain
strength
structures
three-dimensional models
underground installations
Winkler-type model
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Summary:A systematic study is presented herein on the seismic response of buried pipelines subjected to ground fault rupture in the form of normal faulting. In this study, advanced computational simulations are conducted in parallel with physical testing using a geotechnical centrifuge. For the numerical simulations, the pipeline was modeled using isotropic 3-D shell elements and the soil was modeled using either 1-D spring elements or 3-D solid (continuum) elements. The results from continuum finite-element analyses are compared with those from a Winkler-type model (in which the pipe is supported by a series of discrete springs) and with results from centrifuge tests. In addition, via appropriate modeling of the soil-pipe interaction, the q-z relation of the soil medium is elucidated for normal faulting events. The numerical analysis results demonstrate the potential for continuum modeling of events that induce pipe-soil interaction and results in improved understanding of pipe-soil interaction under normal faulting.
ISSN:8755-2930
1944-8201
DOI:10.1193/1.4000137