Uplifting Behavior of Shallow Buried Pipe in Liquefiable Soil by Dynamic Centrifuge Test

Huang, Bo; Li, Jingwen; Lin, Peng; Ling, Daosheng

doi:10.1155/2014/838546

Cited by 14 publications

(10 citation statements)

References 11 publications

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“…is conservative approach can be substituted by the procedure given by Huang et al [79], which computes the uplift displacement considering the vertical forces acting on the pipe at each instant of time during the shaking and uses the principle of Newmark's sliding block to sum up the displacements in different intervals of time. In this way, it would be possible to include the frictional force in the equilibrium, to change the weight of the soil above the pipe while uplift proceeds and to account for the difference in excess pore water pressure development.…”

Section: Resultsmentioning

confidence: 99%

Pipeline Performances under Earthquake-Induced Soil Liquefaction: State of the Art on Real Observations, Model Tests, and Numerical Simulations

Castiglia

Fierro

Magistris

2020

Shock and Vibration

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The design and the manufacture of the oil and gas pipelines are being improved over the years in response to the observed damages and related disastrous effects. The improvements are possible, thanks to the increasing knowledge about pipeline performances in specific contexts. The seismic hazard on buried pipelines has always been of major concern, and the earthquake-induced soil liquefaction effects are among the most important issues to be accounted for in the design. Experiences based on case histories, experimental modelling, and numerical simulations represent the source of understanding of the involved mechanisms, the affecting parameters, and the structure response. Recently, all these aspects are becoming more accurate, thanks to the use of monitoring systems. The protection of pipelines from the seismic hazard is a crucial and challenging issue. This paper provides an overview of the research that has been conducted over the years in the specific framework of soil liquefaction phenomenon. Case histories on pipeline performances, commonly adopted analytical methods, and results of model tests and numerical simulations are summarized with main focus on the level of knowledge achieved up to date and the existing limitations that represent open issues for further development of the research. This study represents a useful background to be adopted from academics and practitioners in order to enhance the methods of analyses of the pipelines, thus improving their performances in the applications of the oil and gas industry.

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Section: Resultsmentioning

confidence: 99%

Pipeline Performances under Earthquake-Induced Soil Liquefaction: State of the Art on Real Observations, Model Tests, and Numerical Simulations

Castiglia

Fierro

Magistris

2020

Shock and Vibration

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“…Research into the uplift resistance of buried pipelines and anchor plates has been extensively reported (Rowe and Davis, 1982;Trautmann et al, 1985;Dikin, 1994;Finch, 1999 Huang et al, 2014). Trautmann et al (1985) developed a small-scale physical model for measuring the maximum uplift force of buried pipelines in dry sand as a function of the density of soil and depth of pipe.…”

Section: Review Of Previous Workmentioning

confidence: 99%

Modeling of Uplift Resistance of Buried Pipeline by Geogrid and Grid-Anchor System

Maljaei

Katebi

Mahdi

2022

J. Pipeline Syst. Eng. Pract.

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This paper presents an experimental and numerical analysis of the uplift resistance of pipelines buried in reinforced soil. The behavior of the system is studied using a set of laboratory experiments. The pull-out forces of some reinforcing pipelines are the most important factors affecting the uplift resistance. Buried elements like pipelines that have high pressure fluids or are under the high temperature, need to be reinforced in order to increase their pull-out resistance. One of the efficient methods to reinforcement, is increasing the involvement between pipe and soil, by using of geogrids and anchors. Grid-anchor is a recent method for increasing the pull-out resistance of soil, and is the method used in this study. The Digital Image Correlation or Particle Image Velocimetry (DIC/PIV) method is used for measuring the displacement in the field of experimental mechanism. We also examined the influence of parameters affecting on the soil. An experimental study was performed to investigate the uplift resistance of the pipelines buried in sand reinforced with this system. The experimental results demonstrate that, for the pipes with a diameter of 50 mm, the grid-anchor system of reinforcement can increase the uplift capacity 2.4 times compared with the conventional geogrid and 4 times compared with non-reinforced sand. In the numerical modeling likewise, 23 experiments were back analyzed using the software FLAC-3D. It became known that experimental tests stand good comparison with the numerical results.

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“…Starting with pipelines, multiple examples are reported where the pipeline floated up to sea level after liquefaction of the seabed. This often occurred after severe storm conditions by wave loading (Christian et al (1974)), or by earthquake loading such as in the Niigata earthquake in 1964 with a total pipeline length of 470 kilometres failing (Huang et al (2014)). The large uplift deformations results in significant damage to the pipelines.…”

Section: Cyclic Loading Of Soilsmentioning

confidence: 99%

Gravity Based Foundations for Offshore Wind Turbines: Cyclic Loading and Liquefaction

Wijngaarden¹,

Meijers

Raaijmakers

et al. 2018

Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics

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In current modelling of excess pore pressures (EPPs) below marine structures, the irregular nature of cyclic loads and the real storm development are not taken into account. The effect of the irregular cyclic loading in time is investigated in this paper. The wind, wave and turbine loads on a gravity based foundation (GBF) are derived in the frequency domain. The real storm development is based on the CoastDat dataset. The load input is used in a program which takes the generation and dissipation of pore pressures under cyclic loading into account. Also, densification is included. The results show that the first storm in the lifetime of the GBF results in the highest EPPs. The EPP decreases in time, due to significant dissipation and densification during the build-up of a storm. Therefore, not the storms with the largest cyclic loads but the storms with the fastest build-up result in the highest EPPs, since this limits the process of densification. A large scatter is found in the maximum values of EPPs due to the irregular nature of the loads.

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Uplifting Behavior of Shallow Buried Pipe in Liquefiable Soil by Dynamic Centrifuge Test

Cited by 14 publications

References 11 publications

Pipeline Performances under Earthquake-Induced Soil Liquefaction: State of the Art on Real Observations, Model Tests, and Numerical Simulations

Pipeline Performances under Earthquake-Induced Soil Liquefaction: State of the Art on Real Observations, Model Tests, and Numerical Simulations

Modeling of Uplift Resistance of Buried Pipeline by Geogrid and Grid-Anchor System

Gravity Based Foundations for Offshore Wind Turbines: Cyclic Loading and Liquefaction

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