Experimental investigation of pipes with flexible joints under fault rupture

Melissianos, Vasileios E.; Lignos, Xenofon A.; Bachas, Konstantinos K.; Gantes, Charis J.

doi:10.1016/j.jcsr.2016.09.026

Cited by 24 publications

(9 citation statements)

References 16 publications

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“…An increasing seismic vulnerability of NG pipelines was actually reported on steel pipelines that were previously weakened by corrosion or poor quality welds (EERI, 1986;Gehl et al, 2014). Permanent ground deformations commonly induce a higher straining on the steel pipelines, compared to transient ground deformations; therefore, most research efforts have been mainly focused on this seismic hazard (Karamitros et al, 2007;Vazouras et al, 2010;Vazouras et al, 2012;Kouretzis et al, 2014;Vazouras et al, 2015;Vazouras et al, 2016;Karamitros et al, 2016;Melissianos et al, 2017aMelissianos et al, , 2017bMelissianos et al, , 2017cDemirci et al, 2018;Sarvanis et al, 2018,;Tsatsis et al 2018, among many others). However, statistically it is more likely for a pipeline to be subjected to transient ground deformations rather than seismically induced permanent ground deformations.…”

Section: Seismic Performance and Critical Failure Modes Of Buried Ng mentioning

confidence: 99%

A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures

Tsinidis

Sarno

Sextos

et al. 2019

Tunnelling and Underground Space Technology

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Section: Seismic Performance and Critical Failure Modes Of Buried Ng mentioning

confidence: 99%

A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures

Tsinidis

Sarno

Sextos

et al. 2019

Tunnelling and Underground Space Technology

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“…Fixity has been applied only on one end for numerical reasons. Furthermore, the numerical model on the use of flexible joints has been validated based on experimental results presented in Melissianos et al (2017). The pipe strain-state is assessed through stresses and strains that are calculated at integration points of several cross-sections along the pipeline.…”

Section: Case Study Reference Pipelinementioning

confidence: 99%

“…The relative axial and lateral displacement capabilities are restricted through appropriate numerical constraints. The adopted modeling approach for pipelines with hinged flexible joints under fault has been verified in Melissianos et al (2017).…”

Section: • Pumice Backfill (Fr3)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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“…Permanent ground deformations tend to induce higher straining on buried steel pipelines, compared to transient ground deformations. Hence, most researchers focused their investigations on this seismic hazard [12][13][14][15][16][17][18][19][20][21][22][23]. However, it is more likely for a buried pipeline to be subjected to transient ground deformations rather than seismically-induced permanent ground deformations.…”

Section: Introductionmentioning

confidence: 99%

Optimal intensity measures for the structural assessment of buried steel natural gas pipelines due to seismically-induced axial compression at geotechnical discontinuities

Tsinidis

Sarno

Sextos

et al. 2020

Soil Dynamics and Earthquake Engineering

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This paper investigates the efficiency and sufficiency of various seismic intensity measures for the structural assessment of buried steel natural gas (NG) pipelines subjected to axial compression caused by transient seismic ground deformations. The study focuses on buried NG pipelines crossing perpendicularly a vertical geotechnical discontinuity with an abrupt change on the soil properties, where the potential of high compression strain is expected to be increased under seismic wave propagation. A detailed analytical framework is developed for this purpose, which includes a 3D finite element model of the pipe-trench system, to evaluate rigorously the pipe-soil interaction phenomena, and 1D soil response analyses that are employed to determine critical ground deformation patterns at the geotechnical discontinuity, caused by seismic wave propagation. A comprehensive numerical parametric study is conducted by employing the analytical methodology in a number of soil-pipeline configurations, considering salient parameters that control the axial response of buried steel NG pipelines, i.e. diameter, wall thickness and internal pressure of the pipeline, wall imperfections of the pipeline, soil properties and backfill compaction level and friction characteristics of the backfill-pipe interface. Using the peak compression strain of the pipeline as engineering demand parameter and a number of regression analyses relative to the examined seismic intensity measures, it is shown that the peak ground velocity PGV at ground surface constitutes the optimum intensity measure for the structural assessment of the examined infrastructure.

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Experimental investigation of pipes with flexible joints under fault rupture

Cited by 24 publications

References 16 publications

A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures

A critical review on the vulnerability assessment of natural gas pipelines subjected to seismic wave propagation. Part 1: Fragility relations and implemented seismic intensity measures

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

Optimal intensity measures for the structural assessment of buried steel natural gas pipelines due to seismically-induced axial compression at geotechnical discontinuities

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