Dynamic response of buried gas pipeline under excavator loading: Experimental/numerical study

Xu, Taolong; Anlin, Yao; Jiang, Hongye; Li, Youlv; Zeng, Xiangguo

doi:10.1016/j.engfailanal.2018.02.026

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…The peak strains of the pipeline at mid-span derived from the FEA were compared with the measured results from the test and theoretical computation, as summarized in Table 6, where the theoretical results were theoretically derived calculated based on the mathematical Equation (21), and the peak strain (ε max, EXP ) in the test was calculated based on the peak longitudinal and transverse strains (ε L and ε T ). It can be found from Table 6 that the standard deviations among ε max,EXP and ε max,THE , and ε max,EXP and ε max,FEA were 6.85% and 5.12%, respectively, according to the calculation of the relative deviation between theory and FEA; compared with some references [49,50], the standard deviation of theory and FEA was more accurate. The results show that the peak strain from the FEA results basically matched with the experimental and theoretical results, which verifies the rationality of the mathematical formula and the feasibility of the FEA model.…”

Section: The Peak Strainmentioning

confidence: 92%

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

et al. 2019

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Long-distance oil and gas pipelines are inevitably impacted by rockfalls during geologic hazards such as mud-rock flow and landslides, which have a serious effect on the safe operation of pipelines. In view of this, an experimental and numerical study on the strain behavior of buried pipelines under the impact load of rockfall was developed. The impact load exerted on the soil, and the strains of buried pipeline caused by the impact load were theoretically derived. A scale model experiment was conducted using a self-designed soil-box to simulate the complex geological conditions of the buried pipeline. The simulation model of hammer-soil-pipeline was established to investigate the dynamic response of the buried pipeline. Based on the theoretical, experimental, and finite element analysis (FEA) results, the overall strain behavior of the buried pipeline was obtained and the effects of parameters on the strain developments of the pipelines were analyzed. Research results show that the theoretical calculation results of the impact load and the peak strain were in good agreement with the experimental and FEA results, which indicates that the mathematical formula and the finite element models are accurate for the prediction of pipeline response under the impact load. In addition, decreasing the diameter, as well as increasing the wall thickness of the pipeline and the buried depth above the pipeline, could improve the ability of the pipeline to resist the impact load. These results could provide a reference for seismic design of pipelines in engineering.

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Section: The Peak Strainmentioning

confidence: 92%

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

et al. 2019

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“…An analysis of corrosion as a factor causing pipeline failure was also presented in [15,16]. The papers in [17,18] focused on gas pipeline damage due to mechanical factors. Experimental and numerical studies on the dynamic response of an underground gas pipeline under loading due to an excavator were described in [17].…”

Section: Introductionmentioning

confidence: 99%

“…The papers in [17,18] focused on gas pipeline damage due to mechanical factors. Experimental and numerical studies on the dynamic response of an underground gas pipeline under loading due to an excavator were described in [17]. A stress-and-strain analysis of buried polyethylene pipelines affected by mechanical excavation was performed in [18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effects of Failure of a Gas Pipeline Caused by a Mechanical Damage

et al. 2021

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Natural gas continues to be one of the basic energy sources used as fuel in the power sector, in industries and in households. The potential and attractiveness of this fuel is gaining special significance in the current energy transitions from coal-based power engineering to power generation based on renewable energy sources. Natural gas is supplied to consumers mainly through a network of pipelines, which ensures a relatively high reliability of the supply. Still, failures occur due to the corrosion of pipeline walls, material defects or human errors, which can result in uncontrolled release of gas. The released gas can trigger dangerous phenomena, such as fires and explosions. This paper presents an analysis of the causes and effects of damage to a medium-pressure pipeline caused by earthworks carried out within an area where a pipeline is located. Holes in the pipeline due to the impact of an excavator bucket are analysed. The impact of the excavator bucket may cause a rupture equal to 50% of the pipeline’s cross-sectional area. Hazard zones related to fires and explosions due to the released natural gas are presented. For the analysed pipeline with a diameter of 0.5 m and a gas pressure of 5 MPa, the range of hazard zones arising due to pipeline damage caused by an excavator bucket can reach about 200 m.

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Mechanical Analysis of Buried Polyethylene Pipelines under Ground Overload

Zheng

Qin

Zhang

et al. 2019

J Fail. Anal. and Preven.

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Dynamic response of buried gas pipeline under excavator loading: Experimental/numerical study

Cited by 10 publications

References 11 publications

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

Experimental and Numerical Study on the Strain Behavior of Buried Pipelines Subjected to an Impact Load

Analysis of the Effects of Failure of a Gas Pipeline Caused by a Mechanical Damage

Mechanical Analysis of Buried Polyethylene Pipelines under Ground Overload

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