Behaviour of buried continuous pipelines crossing strike-slip faults: Experimental and numerical study

Demirci, Hasan Emre; Karaman, Mustafa; Bhattacharya, Subhamoy

doi:10.1016/j.jngse.2021.103980

Cited by 20 publications

(8 citation statements)

References 23 publications

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“…Meanwhile, the trench bottom needs to be widened and excavated to ensure the welding and laying working face, whose size can be calculated by Eqs. (11) and (12). The detailed cross-sectional size of the FE model and trench is shown in Fig.…”

Section: Geometric Modelmentioning

confidence: 99%

“…Rofooei et al [10] conducted a full-scale test on the stress and strain of pipelines under the reverse fault displacement to determine the deformation behavior characteristics of the pipeline with a diameter of D=110mm. Demirci et al [11] examined the behavior of buried pipelines crossing strike-slip faults using experimental and numerical modeling and discussed the influence of pipe parameters on the pipe behavior. Kaya et al [12] proposed a 3-D nonlinear continuum finite element model based on the seismic response of a 2200-mm-diameter welded steel pipe at the strike-slip Kullar fault.…”

Section: Introductionmentioning

confidence: 99%

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Local buckling behavior of buried pipeline under seismic oblique-reverse fault displacement

Huang²,

Chen

et al. 2022

Preprint

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Seismic fault displacement is the main factor leading to the local buckling failure of the buried pipeline, especially crossing the oblique-reverse fault. The 3-D displacement of the oblique-reverse fault makes the local buckling behavior of the buried pipeline more complex. It may be inaccurate to evaluate the local buckling location and degree using the pipe local buckling results under the single fault displacement, affecting the monitoring and safety assessment of the pipeline. In this paper, to determine the pipe local buckling behavior (potential local buckling locations, developing process) under the oblique-reverse fault displacement, a shell and solid element nonlinear contact coupling model of the pipeline crossing oblique-reverse fault is established using ABAQUS. The results reveal two potential local buckling areas and three stages of the local buckling developing process under the oblique-reverse fault displacement. Subsequently, the potential local buckling locations and three stages in the local buckling under different operating conditions is obtained. It proves that using the results of pipe local buckling under single fault to evaluate the pipeline local buckling under composed fault is not safe enough. Consequently, local buckling behavior of the pipeline crossing oblique-reverse fault provides a reference for the preliminary pipe design, detection, and evaluation.

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Section: Geometric Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local buckling behavior of buried pipeline under seismic oblique-reverse fault displacement

Huang²,

Chen

et al. 2022

Preprint

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show abstract

“…In addition, it was concluded that cohesive soils, softer ground conditions, smaller diameter to thickness ratio, smaller pipe internal pressure and X80 steel material (compared with X65) result in a better deformation capacity of the buried pipeline. Similar FE models have been proposed and employed to describe mechanical behavior of steel pipelines crossing strike-slip faults taking boundary conditions into consideration [ 7 ], and mechanical behavior of steel pipelines crossing reverse faults [ 8 , 9 , 10 ] and oblique reverse faults [ 11 ]. In addition to the M-C model, the Drucker–Prager (D-P) model was, also, used to analyze mechanical response of steel pipe subjected to strike-slip fault movement with emphasis on the effects of fault modelling [ 12 ] and mechanical behavior of steel pipe under reverse fault displacement [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Polyethylene Pipes under Strike-Slip Fault Movements

Qiao

Fan

et al. 2022

Polymers

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The present paper addresses the mechanical behaviors and failure mechanisms of buried polyethylene (PE) pipes crossing active strike slip tectonic faults based on numerical simulation of the nonlinear response of the soil-pipeline system. The developed finite element (FE) model is first verified through comparing the simulation results with those from large-scale tests and good agreement between simulation and experimental measurements is obtained. The FE model is then applied to investigate the effects of fault crossing angle, pipe and soil properties on the mechanical behavior of PE pipe. The results indicate that the PE pipe crossing negative fault angles is primarily subjected to compression and bending, thus exhibits the phenomenon of buckling. With the increase of crossing angle, there is an increase of the axial strain and the maximum Mises stress in the buckled cross section, and a decrease of the distance between the buckling position and the fault plane. While for positive crossing angles, the PE pipe is mainly subjected to tension and relatively small bending. Increasing the crossing angle causes an increase in bending strain and a decrease in the axial strain. In addition, when the fault moving speed is slower, the axial strain and bending strain are larger, whereas the maximum Mises stress in the buckled cross section and the distance between the buckled position and the fault plane are reduced. Furthermore, the most severe deformation of the pipe is observed when it is buried in the sandy soil, followed by cohesive soil and loess soil.

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mentioning

confidence: 99%

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mentioning

confidence: 99%