Results 211 to 220 of about 3,055 (262)

Measurement of Deformations in Buried Pipeline

Journal of Surveying Engineering, 1992
Since 1986, measurements of deformations have been made on a section of large‐diameter buried natural gas pipeline in northern Alberta. Precise conventional survey techniques are used to measure the deformations. Three‐dimensional translation components of the deformations are determined through the use of a survey network, while three‐dimensional ...
W. F. Teskey, D. A. Bayly, I. R. Colquhoun   +2 more
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Telluric Effects on a Buried Pipeline

Corrosion, 1993
A 515-km pipeline in northeastern Australia exhibited 5 V telluric potential fluctuations in the 130 km of its length adjacent to the coast. The rest of the pipeline was relatively unaffected. The potential fluctuations were constrained using a combination of potentiostatic cathodic protection (CP) units, diodes connecting the pipeline to Earths, and ...
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Vibration Frequencies of Buried Pipelines

Journal of the Technical Councils of ASCE, 1978
To aid the research on seismic vulnerability, behavior and design of underground piping system, this paper develops and provides the basic fundamentals of dynamics of buried pipelines. The dynamic fundamental frequencies of continuously elastic-supported straight pipelines subjected to axial, torsional and flexural motions. Various boundary conditions,
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Seismic Evaluation of Buried Pipelines

Pipelines 2002, 2002
This paper presents two methods of analysis for buried pipelines subjected to seismic wave propagation effects, temperature load, and internal pressure. The use of closed-form equations for analysis of a single bend with arbitrary bend angle subjected to seismic ground strain, temperature load, and internal pressure is first presented.
Frank W. Kan, Mehdi S. Zarghamee, Brian D. Rose   +2 more
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Buried Seafloor Pipeline Crossing a Fault

Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020
Steel tubular structures are widely used in offshore structures and seafloor pipeline. Soil movement due to storm or earthquake could cause costly damage to buried pipelines or piles of the offshore fixed platform. The objective here is to prevent such failure by strengthening a single wall tubular with double wall, in which the annulus is grouted with
Vul Thang, Peter W. Marshall, David Hui
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Centrifuge Modeling of Buried Pipelines

Advancing Mitigation Technologies and Disaster Response for Lifeline Systems, 2003
Fault crossing, lateral spreads and other types of permanent ground deformation (PGD) are arguably the most severe seismic hazards for continuous buried pipelines. Current analysis and design procedures, to a great extent, are based upon Finite Element (FE) modeling.
Michael O'Rourke, Vikram Gadicherla, Tarek Abdoun   +2 more
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Stray current corrosion in buried pipeline

Anti-Corrosion Methods and Materials, 2011
PurposeThe purpose of this paper is to analyze and solve abnormal variation of pipe‐to‐soil potentials of an oil‐transfer pipeline.Design/methodology/approachPipe‐to‐soil potentials of an oil‐transfer pipeline varied abnormally at several locations.
Qingjun Zhu, Alin Cao, Wang Zaifend, Jiwen Song, Chen Shengli   +4 more
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Earthquake resistance of buried pipelines

A complete dynamic analysis is performed for the investigation of the behaviour of buried pipelines in a seismic environment. Axial and transverse displacements and axial and bending strains are evaluated. The effects of seismic ground motion parameters and structural and soil characteristics on the response of these extended structures are determined.
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Analysis of Buried, Jointed Pipelines

1987
ABSTRACT An exact, closed-form solution for a uniformly-loaded, straight, buried, Jointed Bernoulli-Euler beam with an arbitrarily-located piece-wise linear joint has been developed in the usefull form of a space-beam, finite-element suitable for inclusion in a space-frame, stiffness computer program.
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Liquefaction Analysis for Buried Pipelines

1987
On essaie de clarifier le comportement de pipeline et du systeme pipeline-trou d'homme soumis a la liquefaction par des experiences en vue d'obtenir une force de trainee, une force externe et une constante de ressort equivalent utilisees dans des analyses de liquefaction et pour proposer des formules pour calculer les deformations en flexion du ...
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