Seismic behavior of buried PE pipelines subject to fault offsets

Michael J. O'Rourke, Tarek H. Abdoun, Da Ha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper presents the results of a series of centrifuge tests on the behavior of buried PE pipe subject to the fault offset hazard. The tests simulated both Strike-Slip (SS) and Normal offsets. Besides fault type, the three main parameters that were varied include the pipe burial depth, the intersection angle between the pipe axis and the fault (SS faults) and the direction of faulting (SS with right lateral or left lateral offset). Instrumentation allowed acquisition of pipe strain data which was decomposed into axial strain and flexural (bending) strain components. The paper will describe the rates at which strain decreases with distance from the fault, and the strong influence of burial depth and intersection angle on the magnitude of axial and flexural strain. New instrumentation allowed acquisition of the normal pressure between the buried PE pipe and the surrounding soil. As one might expect the normal pressure varied in the circumferential direction, as well as with distance from the fault. These pressures were used to estimate force-deformation characteristics of the equivalent 'soil-springs'. Unlike the 2-D behavior assumed for soil-spring models currently used in practice, the centrifuge results show that the behavior is actually 3-D in nature. Fortunately, as will be shown in the paper, 2-D soil-spring models yield conservative results in terms of pipe strains.

Original languageEnglish (US)
Title of host publicationASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010
Pages751-767
Number of pages17
DOIs
StatePublished - 2010
EventASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010 - Bellevue, WA, United States
Duration: Jul 18 2010Jul 22 2010

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume1
ISSN (Print)0277-027X

Other

OtherASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010
CountryUnited States
CityBellevue, WA
Period7/18/107/22/10

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Seismic behavior of buried PE pipelines subject to fault offsets'. Together they form a unique fingerprint.

Cite this