Research Papers: Pipeline Systems

PVCO Pipeline Performance Under Large Ground Deformation

[+] Author and Article Information
Brad P. Wham

School of Civil and Environment Engineering,
Cornell University,
226a Hollister Hall,
Ithaca, NY 14853
e-mail: bpw37@cornell.edu

Christina Argyrou

School of Civil and Environment Engineering,
Cornell University,
267 Hollister Hall,
Ithaca, NY 14853
e-mail: ca353@cornell.edu

Thomas D. O'Rourke

School of Civil and Environment Engineering,
Cornell University,
323 Hollister Hall,
Ithaca, NY 14853
e-mail: tdo1@cornell.edu

Harry E. Stewart

School of Civil and Environment Engineering,
Cornell University,
324 Hollister Hall,
Ithaca, NY 14853
e-mail: hes1@cornell.edu

Timothy K. Bond

School of Civil and Environment Engineering,
Cornell University,
B02 Thurston Hall,
Ithaca, NY 14853
e-mail: tkb2@cornell.edu

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received July 21, 2015; final manuscript received June 10, 2016; published online August 24, 2016. Assoc. Editor: Hardayal S. Mehta.

J. Pressure Vessel Technol 139(1), 011702 (Aug 24, 2016) (8 pages) Paper No: PVT-15-1164; doi: 10.1115/1.4033939 History: Received July 21, 2015; Revised June 10, 2016

Technological advances have improved pipeline capacity to accommodate large ground deformation associated with earthquakes, floods, landslides, tunneling, deep excavations, mining, and subsidence. The fabrication of polyvinyl chloride (PVC) piping, for example, can be modified by expanding PVC pipe stock to approximately twice its original diameter, thus causing PVC molecular chains to realign in the circumferential direction. This process yields biaxially oriented polyvinyl chloride (PVCO) pipe with increased circumferential strength, reduced pipe wall thickness, and enhanced cross-sectional flexibility. This paper reports on experiments performed at the Cornell University Large-Scale Lifelines Testing Facility characterizing PVCO pipeline performance in response to large ground deformation. The evaluation was performed on 150-mm (6-in.)-diameter PVCO pipelines with bell-and-spigot joints. The testing procedure included determination of fundamental PVCO material properties, axial joint tension and compression tests, four-point bending tests, and a full-scale fault rupture simulation. The test results show that the performance of segmental PVCO pipelines under large ground deformation is strongly influenced by the axial pullout and compressive load capacity of the joints, as well as their ability to accommodate deflection and joint rotation. The PVCO pipeline performance is quantified in terms of its capacity to accommodate horizontal ground strain, and compared with a statistical characterization of lateral ground strains caused by soil liquefaction during the Canterbury earthquake sequence in New Zealand.

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Fig. 1

PVCO stress–strain characterization of (a) longitudinal properties from tensile coupon tests and (b) circumferential properties from internal pressurization

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Fig. 2

(a) Force-displacement results from axial tension tests and (b) restrained joint of specimen TT2 prior to tension test

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Fig. 3

Rupture of restrained joint specimen TT2 (a) at failure and (b) posttest

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Fig. 4

Axial tensile and compressive tests on restrained and unrestrained joints

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Fig. 5

Axial compression tests (a) specimen CT1 bell bulging and (b) wrinkling of specimen CT2 spigot

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Fig. 6

Four-point bending test setup for rotation test RT3

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Fig. 7

Moment–rotation of four-point bending tests RT2 and RT3

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Fig. 8

Plan view of PVCO pipe centered specimen in test basin

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Fig. 9

Average axial and bending strains at failure of split-basin test




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