Research on local buckling failure range of X80 buried steel pipeline under oblique-reverse fault

Ma, Chuan; Xu, Taozhi; Xu, Lingyue; Wang, Yun; An, Kuo; Hu, Wen-Jun

doi:10.1016/j.soildyn.2022.107592

Cited by 5 publications

(9 citation statements)

References 32 publications

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“…Based on the simplified loading, the large deformation area of the pipeline is taken as the research object, and the mechanical model (Fig. 2) of the pipeline is established whose trench is backfilled with soil under the normal fault displacement 13,14,39,40 . Take the intersection of the undeformed pipeline and the fault plane as the coordinate origin O to establish the coordinate system, as shown in Fig.…”

Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

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With the large-scale construction of oil and gas pipelines, the safety issues of long-distance buried pipelines in the service and construction have become increasingly prominent. The complex geological and topographical conditions of the special zone will put forwards extremely high requirements on pipe trench laying backfill materials and construction technology. For example, pipelines are inevitable to cross the active fault, while the trench backfilled with soil has limitations in protecting them from failure under the active fault displacement caused by the earthquake. Therefore, it is necessary to study the pipe–soil interaction mechanism, determine the stress state of the pipeline and propose a new backfilling material that can protect the pipeline from failure. Foam concrete (FC) provides a new choice to backfill the buried pipeline trench due to its high-homogeneity, lightweight, controllable-strength, and self-compacting. To further determine the applicability of the FC, the pipe-FC interaction mechanism is studied. Then, a FE model of the FC-pipeline-soil interaction system is established by Abaqus to quantitatively analyze the applicability of the FC based on the experimental data of the mechanical performance of the FC. It proves that using FC as trench backfill material has a noticeable protective effect on the pipeline under the earthquake-induced displacement of the normal fault. Furthermore, FC has a better protective effect on the pipeline subjected to compressive than tensile. Therefore, the reference for applying FC in trench backfilling of pipelines crossing normal fault is provided.

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Section: Pipe-soil Interaction Mechanismmentioning

confidence: 99%

Research on the interaction between trench material and pipeline under fault displacement

Yang,

Wang,

Jia

et al. 2024

Sci Rep

Self Cite

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show abstract

“…Furthermore, Trifonov and Cherniy 28 took into account the impact of axial force on the bending deformation of the pipeline and obtained a strain solution for the pipeline under strike-slip fault, accounting for the effect of the internal pressure and temperature of the pipeline. In addition, numerous scholars have also investigated the mechanical response of buried pipelines under fault by numerical simulation method [30][31][32][33][34][35] and model test method. [36][37][38][39][40] Ma et al 30 established a three-dimensional numerical model of X80 buried steel pipeline crossing reverse fault based on the ABAQUS software, and systematically analyzed the failure characteristics and failure range of local flexure of buried pipeline.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, numerous scholars have also investigated the mechanical response of buried pipelines under fault by numerical simulation method [30][31][32][33][34][35] and model test method. [36][37][38][39][40] Ma et al 30 established a three-dimensional numerical model of X80 buried steel pipeline crossing reverse fault based on the ABAQUS software, and systematically analyzed the failure characteristics and failure range of local flexure of buried pipeline. By using beam units and discrete nonlinear springs, Joshi et al 32 simulated the behavior of buried pipelines under reverse fault and analyzed for the sensitivity parameters such as pipeline cross-section and material.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In addition, numerous scholars have also investigated the mechanical response of buried pipelines under fault by numerical simulation method 30–35 and model test method 36–40 . Ma et al 30 . established a three‐dimensional numerical model of X80 buried steel pipeline crossing reverse fault based on the ABAQUS software, and systematically analyzed the failure characteristics and failure range of local flexure of buried pipeline.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analytical solution for buried pipeline deformation induced by normal and reverse fault considering structural joint influence

Zhang,

Feng,

Zhu

et al. 2024

Num Anal Meth Geomechanics

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Previous studies take less account of analytical solution analysis for buried pipeline under the action of active fault. Furthermore, current theoretical studies of fault‐pipeline interactions generally treat the structure as continuous pipeline, with less attention given to the effect of joints. This paper provides an analytical method to estimate the deformation and internal force of jointed pipelines under normal and reverse fault. By introducing the simplified soil deformation model and error function, the soil greenfield deformation curves under the influence of normal and reverse fault are obtained. Considering the interaction between the pipeline structure and the disturbed soil, the two‐parameter Pasternak foundation model is adopted to analyze the forces on pipeline infinitesimal elements. Then, the mechanical response of the jointed pipeline structure due to the fault additional load is solved by finite difference method. The accuracy of the presented analytical solution is verified by comparisons with observed data of model test and 3D numerical simulation results. Finally, the parametric analyses are performed to estimate the influence for the characteristics of the foundation, fault and joint, including subgrade shear stiffness, subgrade reaction coefficient, fault dip, joint rotational stiffness, joint spacing, and intersection of fault and pipeline.

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Failure analysis of pipelines with corrosion defects under landslide

Hu,

Lu,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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As the total mileage of the pipeline and the years of operation are increasing, the threat of landslide and corrosion defects to the safety of pipeline operation is also increasing. In this paper, based on the nonlinear elastoplastic theory, a pipe-soil coupling model is established to determine the maximum stress location of the pipeline containing corrosion defects under the action of landslide, on the basis of this location, the internal pressure of pipeline operation and the factors such as landslide width and landslide displacement are analyzed. Through multivariate linear regression, the equation of the maximum stress of the pipeline with the change of landslide width and displacement is fitted. The results show that in the landslide area, the operating pressure has less influence on the safety of the pipeline and the existence of corrosion defects will lead to sudden stress changes here, which will lead to the perforation of the pipeline; with the increase of the landslide width and landslide displacement, the plastic deformation area will appear in the middle of the pipeline, which means that the pipeline in this area is prone to bending, rupture and flattening and other failures, and the safety of the pipeline has a greater risk. In the non-slippery area, the maximum stress of the pipeline will increase with the increase of operating pressure, landslide width, and landslide displacement. Through multiple linear regression, the correlation coefficients of fitting the maximum stress of the pipeline with the expressions of landslide width and displacement are 0.959 and 0.996 respectively to prove the reliability of the formula.

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Research on local buckling failure range of X80 buried steel pipeline under oblique-reverse fault

Cited by 5 publications

References 32 publications

Research on the interaction between trench material and pipeline under fault displacement

Research on the interaction between trench material and pipeline under fault displacement

Analytical solution for buried pipeline deformation induced by normal and reverse fault considering structural joint influence

Failure analysis of pipelines with corrosion defects under landslide

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