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Research Papers: Materials and Fabrication

Effects of Stress–Strain Characteristics on Local Buckling of X80 Pipe Subjected to Strike-Slip Fault Movement

[+] Author and Article Information
Xiaoben Liu

College of Mechanical and
Transportation Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: liuxiaoben1991@126.com

Hong Zhang

College of Mechanical and
Transportation Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: hzhang@cup.edu.cn

Onyekachi Ndubuaku

Department of Civil and
Environmental Engineering,
University of Alberta,
Edmonton, AB T6G 2W2, Canada
e-mail: ndubuaku@ualberta.ca

Mengying Xia

College of Mechanical and
Transportation Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: xiamengying322@163.com

J. J. Roger Cheng

Department of Civil and
Environmental Engineering,
University of Alberta,
Edmonton, AB T6G 2W2, Canada
e-mail: roger.cheng@ualberta.ca

Yong Li

Department of Civil and
Environmental Engineering,
University of Alberta,
Edmonton, AB T6G 2W2, Canada
e-mail: yong9@ualberta.ca

Samer Adeeb

Department of Civil and
Environmental Engineering,
University of Alberta,
Edmonton, AB T6G 2W2, Canada
e-mail: adeeb@ualberta.ca

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received February 27, 2018; final manuscript received May 9, 2018; published online June 18, 2018. Assoc. Editor: Oreste S. Bursi.

J. Pressure Vessel Technol 140(4), 041408 (Jun 18, 2018) (12 pages) Paper No: PVT-18-1047; doi: 10.1115/1.4040314 History: Received February 27, 2018; Revised May 09, 2018

The structural integrity of underground pipelines are subject to a major threat from permanent ground displacements when they cross active tectonic (e.g., strike-slip) faults, because of large strains potentially induced in pipes, leading to pipe buckling and possible rupture. In this paper, the buckling behavior of X80 pipe is studied numerically with an emphasis on the effects of steel stress–strain characteristics. A rigorous mechanics-based nonlinear finite element (FE) model of a buried X80 pipe crossing a strike-slip fault is developed using shell elements and nonlinear springs for the pipe and soil resistance, respectively. The pipe steel material in the FE model is characterized by a novel and versatile stress–strain relationship, which was established to successfully capture both the round-house (RH) type and the yield-plateau (YP) type stress–strain behaviors. This allows investigating the significant effects of the stress–strain characteristics, as observed in this paper, on the buckling behavior of pressurized and nonpressurized pipes.

Copyright © 2018 by ASME
Topics: Stress , Pipes , Buckling , Steel
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Figures

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Fig. 1

Schematical view of the modeling of soil resistance to pipe: P for axial springs, T for lateral springs, and Q for vertical springs [20]

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Fig. 2

Soil resistance-displacement relationships for nonlinear soil springs [20]: (a) lateral, (b) axial, and (c) vertical

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Fig. 3

Nonlinear FE model for a buried pipeline crossing a strike-slip fault: (a) a sketch of numerical model [35] and (b) numerical mode established in abaqus

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Fig. 4

Comparison results of the proposed model and relative numerical and experimental results: (a) axial strain and (b) bending strain

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Fig. 5

Plots of four stress–strain curves for X80 line pipe steel

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Fig. 6

Relationship between the section axial force Faxial and the fault displacement δs for pressurized X80 pipe model with different SS curves

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Fig. 7

Axial strain distribution on the lateral side of pressurized X80 pipe with RH type SS curve (σprop = 400 MPa)

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Fig. 8

Local deformation and strain response of pressurized X80 pipe with RH type SS curve (σprop = 400 MPa): (a) δs = 0.18 m, (b) δs = 0.465 m (onset of buckling), (c) δs = 0.468 m, and (d) δs = 0.469 m

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Fig. 9

Axial strain distribution on the lateral side of pressurized X80 pipe with RH type SS curve (σprop = 200 MPa)

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Fig. 10

Local deformation and strain response of pressurized X80 pipe with RH type SS curve (σprop = 200 MPa): (a) δs = 0.18 m, (b) δs = 0.52 m, (c) δs = 0.53 m (onset of buckling), and (d) δs = 0.54 m

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Fig. 11

Axial strain distribution on the lateral side of pressurized X80 pipe with YP type SS curve (YPL = 0.01)

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Fig. 12

Local deformation and strain response of pressurized X80 pipe with YP type SS curve (YPL = 0.01): (a) δs = 0.13 m, (b) δs = 0.14 m (onset of buckling), (c) δs = 0.15 m, and (d) δs = 0.16 m

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Fig. 13

Axial strain distribution on the lateral side of pressurized X80 pipe with YP type SS curve (YPL = 0.005)

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Fig. 14

Local deformation and strain response of pressurized X80 pipe with YP type SS curve (YPL = 0.005): (a) δs = 0.09 m, (b) δs = 0.14 m, (c) δs = 0.16 m (onset of buckling), and (d) δs = 0.18 m

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Fig. 15

Relationship between the section axial force Faxial and the fault displacement δs for nonpressurized X80 pipe with different SS curves

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Fig. 16

Axial strain distribution on the lateral side of nonpressurized X80 pipe with RH type SS curve (σprop = 400 MPa)

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Fig. 17

Local deformation and strain response of nonpressurized X80 pipe with RH type SS curve (σprop = 400 MPa): (a) δs = 0.18 m, (b) δs = 0.64 m, (c) δs = 0.65 m (onset of buckling), and (d) δs = 0.651 m (post-buckling)

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Fig. 18

Axial strain distribution on the lateral side of nonpressurized X80 pipe with RH type SS curve (σprop = 200 MPa)

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Fig. 19

Local deformation and strain response of nonpressurized X80 pipe with RH type SS curve (σprop = 200 MPa)

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Fig. 20

Axial strain distribution on the lateral side of nonpressurized X80 pipe with YP type SS curve (YPL = 0.01)

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Fig. 21

Local deformation and strain response of nonpressurized X80 pipe with YP type SS curve (YPL = 0.01): (a) δs = 0.28 m, (b) δs = 0.32 m (onset of buckling), (c) δs = 0.36 m, and (d) δs = 0.39 m

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Fig. 22

Axial strain distribution on the lateral side of nonpressurized X80 pipe with YP type SS curve (YPL = 0.005)

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Fig. 23

Local deformation and strain response of nonpressurized X80 pipe with YP type SS curve (YPL = 0.005): (a) δs = 0.3 m, (b) δs = 0.32 m (onset of buckling), (c) δs = 0.38 m, and (d) δs = 0.42 m

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