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Prof. Dr. Samuel Ariaratnam

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School of Sustainable Engineering and The Built Environment, Arizona State University, Tempe, AZ, USA
Interests: trenchless technology; horizontal directional drilling; underground construction; asset management

Special Issue Information

Dear Colleagues,

Currently, the energy sector plays a vital role in the global economy. Electricity, natural gas, and liquid petroleum are crucial for economic development and societal growth. Pipelines play an important role in the transportation of natural gas and liquid petroleum. Additionally, the trend towards burying electrical transmission and distribution lines has resulted in the need for networks installed with minimal disruption to surface activities. Trenchless construction methods such as horizontal directional drilling (HDD) and microtunneling have become commonplace in the installation of energy pipelines, many of which navigate beneath waterbodies, including harbors and rivers.

Research efforts have resulted in a better understanding of the engineering and construction aspects of employing trenchless construction methods in the energy sector. Expanding the boundaries of these technologies with installations of longer distances, larger diameters, and in more challenging environments has been made possible through innovation fostered through research advancements.

This Special Issue will cover advanced research and unique case studies of applications of trenchless construction methods for the installation of underground energy pipelines, including electrical transmission/distribution, natural gas, liquid petroleum, and other utilities. I therefore invite papers and reviews related to these research topics.

Prof. Dr. Samuel Ariaratnam
Guest Editor

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Keywords

Energy pipelines
Trenchless technologies
Horizontal directional drilling
Microtunneling

Published Papers (1 paper)

Research

17 pages, 9477 KiB

Open AccessArticle

Comparison of 3D Solid and Beam–Spring FE Modeling Approaches in the Evaluation of Buried Pipeline Behavior at a Strike-Slip Fault Crossing

by Farzad Talebi and Junji Kiyono

Energies 2021, 14(15), 4539; https://doi.org/10.3390/en14154539 - 27 Jul 2021

Cited by 6 | Viewed by 2733

Abstract

Validated 3D solid finite element (FE) models offer an accurate performance of buried pipelines at earthquake faults. However, it is common to use a beam–spring model for the design of buried pipelines, and all the design guidelines are fitted to this modeling approach. Therefore, this study has focused on (1) the improvement of modeling techniques in the beam–spring FE modeling approach for the reproduction of the realistic performance of buried pipelines, and (2) the determination of an appropriate damage criterion for buried pipelines in beam–spring FE models. For this paper, after the verification of FE models by pull-out and lateral sliding tests, buried pipeline performance was evaluated at a strike-slip fault crossing using nonlinear beam–spring FE models and nonlinear 3D solid FE models. Material nonlinearity, contact nonlinearity, and geometrical nonlinearity effects were considered in all analyses. Based on the results, pressure and shear forces caused by fault movement and pipeline deformation around the high curvature zone cause local confinement of the soil, and soil stiffness around the high curvature zone locally increases. This increases the soil–pipe interaction forces on pipelines in high curvature zones. The beam–spring models and design guidelines, because of the uniform assumption of the soil spring stiffness along the pipe, do not consider this phenomenon. Therefore, to prevent the underestimation of forces on the pipeline, it is recommended to consider local increases in soil spring stiffness around the high curvature zone in beam–spring models. Moreover, drastic increases in the strain responses of the pipeline in the beam–spring model is a good criterion for a damage evaluation of the pipeline. Full article

(This article belongs to the Special Issue Trenchless Construction Methods for Energy Pipelines)

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