5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)

Vol. I, pp. 3-19


ON THE NUMERICAL SIMULATION OF THE RESPONSE OF GAS PIPELINES UNDER COMPRESSION

 

Grigorios Tsinidis 1, Luigi Di Sarno 2*, Anastasios Sextos 3, Nikolaos Psyrras 4 and Peter Furtner 5

1 University of Sannio, Benevento, Italy

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2 University of Sannio, Benevento, Italy & University of Liverpool, Liverpool, United Kingdom

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3 University of Bristol, Bristol, United Kingdom & Aristotle University of Thessaloniki, Thessaloniki, Greece

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4 University of Bristol, Bristol, United Kingdom

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5 Vienna Consulting Engineers, Vienna, Austria

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DOI:10.18057/ICASS2018.P.177

ABSTRACT:

Steel gas pipelines may be subjected to buckling failure under large compressive straining, caused by seismically induced ground deformations. This paper further elaborates on the buckling response of this type of networks, through the presentation of representative results from a series of axial compression static analyses that were conducted on segments of steel gas pipelines. Above ground and embedded segments of diverse radius to thickness ratios (R/t) were simulated by means of inelastic shell elements. The trench of embedded pipelines was modelled using solid elastic elements, while an advanced contact model was used to simulate the pipe-soil interface. Salient parameters that affect the axial response, including the internal pressure and the existence of imperfections on the segment, were considered in this study. In line with previous evidence, the results reveal a reduction of the axial response of the pipe segment with increasing levels of internal pressure. In parallel, internal pressure leads the limit stresses to occur at progressively higher axial deformations, while limit loads computed for embedded pipelines are higher compared to those predicted for equivalent above ground pipelines, as a result of the soil confinement.

Keywords:

Gas pipelines; Above ground pipelines; Embedded pipelines; Critical loading; imperfections

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IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM