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Flow-Induced Stresses and Displacements in Jointed Concrete Pipes Installed by Pipe Jacking Method

1
Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, NV 89154, USA
2
Department of Civil Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran
*
Author to whom correspondence should be addressed.
Fluids 2019, 4(1), 34; https://doi.org/10.3390/fluids4010034
Received: 16 January 2019 / Revised: 9 February 2019 / Accepted: 19 February 2019 / Published: 21 February 2019
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Abstract

Transient flows result in unbalanced forces and high pressure in pipelines. Under these conditions, the combined effects of flow-induced forces along with sudden pipe displacements can create cracks in the pipeline, especially at the junctions. This situation consequently results in water leakage and reduced operational efficiency of the pipeline. In this study, displacements and stresses in a buried pressurized water transmission pipe installed by pipe jacking method are investigated using numerical modeling and considering interactions between fluid, pipe, and soil. The analyses were performed consecutively under no-flow, steady flow, and transient flow conditions, in order to investigate the effects of flow conditions on displacements and stresses in the system. Analyses of the results show that displacements and stresses in the jointed concrete pipes are significant under transient flow conditions. Moreover, because of pressure transient effects, maximum tensile stresses exceed the tensile strength of concrete at the junctions, leading to cracks and consequent water leakage. View Full-Text
Keywords: fluid–structure interaction; soil-structure interaction; transient flow; numerical modeling; Abaqus finite element analysis (FEA) fluid–structure interaction; soil-structure interaction; transient flow; numerical modeling; Abaqus finite element analysis (FEA)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Karakouzian, M.; Karami, M.; Nazari-Sharabian, M.; Ahmad, S. Flow-Induced Stresses and Displacements in Jointed Concrete Pipes Installed by Pipe Jacking Method. Fluids 2019, 4, 34.

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