Elastoplastic Analysis of Mechanical Response of Buried Pipelines under Strike-Slip Faults

Zhang, Lisong; Zhao, Xiaomeng; Yan, Xiangzhen; Yang, Xiawei

doi:10.1061/(asce)gm.1943-5622.0000790

Cited by 15 publications

(8 citation statements)

References 29 publications

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“…Based on the main scope of this method, Trifonov et al [14,15] conducted further elastoplastic analysis of steel pipe under fault displacement considering operation load. Similar works were also conducted by Zhang L. [16,17,18] on both onshore and offshore buried pipelines under active fault or landslide displacements.…”

Section: Introductionsupporting

confidence: 57%

Numerical Analysis and Strength Evaluation of an Exposed River Crossing Pipeline with Casing Under Flood Load

Liu¹,

Zhang²,

Xia³

et al. 2018

Period. Polytech. Civil Eng.

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Pipelines in service always experience complicated loadings induced by operational and environmental conditions. Flood is one of the common natural hazard threats for buried steel pipelines. One exposed river crossing X70 gas pipeline induced by flood erosion was used as a prototype for this study. A mechanical model was established considering the field loading conditions. Morison equations were adopted to calculate distributional hydrodynamic loads on spanning pipe caused by flood flow. Nonlinear soil constraint on pipe was considered using discrete nonlinear soil springs. An explicit solution of bending stiffness for pipe segment with casing was derived and applied to the numerical model. The von Mises yield criterion was used as failure criteria of the X70 pipe. Stress behavior of the pipe were analyzed by a rigorous finite element model established by the general-purpose Finite-Element package ABAQUS, with 3D pipe elements and pipe-soil interaction elements simulating pipe and soil constraints on pipe, respectively. Results show that, the pipe is safe at present, as the maximum von Mises stress in pipe with the field parameters is 185.57 MPa. The critical flow velocity of the pipe is 5.8 m/s with the present spanning length. The critical spanning length of the pipe is 467 m with the present flow velocity. The failure pipe sections locate at the connection point of the bare pipe and the pipe with casing or the supporting point of the bare pipe on riverbed.Keywords finite element analysis, river crossing, buried X70 pipe, flood load, pipe soil interaction Period. Polytech. Civil Eng.X. Liu, H. Zhang et al.

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Section: Introductionsupporting

confidence: 57%

Numerical Analysis and Strength Evaluation of an Exposed River Crossing Pipeline with Casing Under Flood Load

Liu¹,

Zhang²,

Xia³

et al. 2018

Period. Polytech. Civil Eng.

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“…Metals 2018, 8,22 5 of 25 of pipe central axis as illustrated in Figure 1, where continuous lines represent the real characteristic and dashed lines represent the approximation implemented in the model. The parameters Pu, Tu, and Qu(Qd) represent the peak soil resistances per unit length of pipes, while ∆p, ∆t, and ∆qu (∆qd) represent the corresponding yield displacements in three directions (i.e., lateral, axial, and vertical), respectively.…”

Section: Modelling Pipe-soil Interaction With Discrete Nonlinear Soilmentioning

confidence: 99%

“…Metals 2018, 8,22 7 of 25 analysis step to explicit dynamic step. With the performed dynamic analysis, the model can be utilized to predict the transients associated with buckling phenomena, thus possibly allowing integration with the techniques adopted for leak detection [50][51][52][53].…”

Section: Constitutive Model Of Equivalent Boundarymentioning

confidence: 99%

“…Kennedy et al [4] and Wang et al [5] considered pipe bending with assumptions that pipes deform as curved arcs and elastic beams. In more recent decades, more complicated semi-analytical approaches were proposed by Karamitros et al [6], Trifonov et al [7], and Zhang et al [8], who considered the elastoplastic characteristic of pipe steel's constitutive model and their effects on pipe's nonlinear stress distributions in sections of large deformed pipe segments near fault trace. Although these analytical methods can be more easily popularized in guidelines for engineering applications, they also have severe weaknesses.…”

Section: Introductionmentioning

confidence: 99%

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Local Buckling Behavior and Plastic Deformation Capacity of High-Strength Pipe at Strike-Slip Fault Crossing

Liu

Zhang

Wang

et al. 2017

Metals

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Abstract:As a typical hazard threat for buried pipelines, an active fault can induce large plastic deformation in a pipe, leading to rupture failure. The mechanical behavior of high-strength X80 pipeline subjected to strike-slip fault displacements was investigated in detail in the presented study with parametric analysis performed by the finite element model, which simulates pipe and soil constraints on pipe by shell and nonlinear spring elements respectively. Accuracy of the numerical model was validated by previous full-scale experimental results. Insight of local buckling response of high-strength pipe under compressive strike-slip fault was revealed. Effects of the pipe-fault intersection angle, pipe operation pressure, pipe wall thickness, soil parameters and pipe buried depth on critical section axial force in buckled area, critical fault displacement, critical compressive strain and post buckling response were elucidated comprehensively. In addition, feasibility of some common buckling failure criteria (i.e., the CSA Z662 model proposed by Canadian Standard association, the UOA model proposed by University of Alberta and the CRES-GB50470 model proposed by Center of Reliable Energy System) was discussed by comparing with numerical results. This study can be referenced for performance-based design and assessment of buried high-strength pipe in geo-hazard areas.

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“…Newmark and Hall (1975) were the pioneers in this ongoing effort, presenting a pertinent simplified analytical methodology, considering the pipe as a long cable subjected to relative small displacements caused by a planar fault dividing the ground into two blocks. Then, several researchers extended this analytical procedure by taking into account material non-linearity and non-symmetric conditions regarding the pipe deformation (Kennedy et al, 1977;Kennedy and Kincaid, 1983;Wang and Yeh, 1985;Wang and Wang, 1995;Takada et al, 2001;Karamitros et al, 2007Karamitros et al, , 2011Trifonov andCherniy, 2010, 2012) and the pipe service loads (Zhang et al, 2016b).…”

mentioning

confidence: 99%

Evaluation of Seismic Protection Methods for Buried Fuel Pipelines Subjected to Fault Rupture

Gantes

Melissianos

2016

Front. Built Environ.

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Buried steel fuel pipelines are critical lifelines for the society and the economy but are very vulnerable to earthquake-induced ground failure. Traversing seismic areas inevitably results in several pipe-fault crossings. Fault rupture forces a buried pipeline to undergo deformations that could be substantial and heavily endanger its integrity. Due to the grave consequences of a potential pipe failure, mitigating measures are commonly applied at pipe-fault crossings to reduce the effects of a potential fault activation. In this paper, a comparative review of several measures that are used in practice or have been proposed in the technical literature is presented. Numerical analyses are then carried out to compare the effectiveness of commonly used measures and to extract conclusions regarding their applicability. Results indicate that the most efficient among the evaluated measures are pipe placement within culverts and use of flexible joints. Trench backfilling with pumice is a moderately effective measure in terms of pipe protection, while steel grade upgrade, wall thickness increase, and pipe wrapping with geotextile are found to be insufficient protection methods.

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Elastoplastic Analysis of Mechanical Response of Buried Pipelines under Strike-Slip Faults

Cited by 15 publications

References 29 publications

Numerical Analysis and Strength Evaluation of an Exposed River Crossing Pipeline with Casing Under Flood Load

Numerical Analysis and Strength Evaluation of an Exposed River Crossing Pipeline with Casing Under Flood Load

Local Buckling Behavior and Plastic Deformation Capacity of High-Strength Pipe at Strike-Slip Fault Crossing

Evaluation of Seismic Protection Methods for Buried Fuel Pipelines Subjected to Fault Rupture

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