Dilan Jeyachandran Robert

Multi-time Step Deterioration Prediction of Freeways Using Linear Regression and Machine Learning Approaches: A Case Study

Publisher: Springer Science and Business Media LLC

Date: 19-09-2023

DOI: 10.1007/S42947-023-00376-X

Equation to predict maximum pipe stress incorporating internal and external loadings on buried pipes

Publisher: Canadian Science Publishing

Date: 08-2016

DOI: 10.1139/CGJ-2015-0500

Abstract: Pipelines used for water and other services are very important lifelines in modern society. Commonly, these buried pipes are subjected to significant stresses due to external (traffic and earth) and internal (water pressure) loads. As many of these pipelines were laid sometime in the last century or earlier, in most cases their condition has deteriorated primarily by electrochemical and (or) microbiological corrosion. Corrosion activity (internal and external) can manifest in various forms, but in many cases will lead to reduced pipe thickness, which in turn leads to an increase in pipe stresses induced by the external and internal loads. Currently available analytical procedures to estimate pipe stresses are based on oversimplifications such as the two-dimensional (2-D) analysis based on Winkler springs, limiting their application to general pipe burial conditions. This paper describes the application of a three-dimensional (3-D) finite element method to analyse a buried pipe subjected to external and internal loads. Firstly, the finite element model is validated against the data from field tests conducted on the basis of a cast iron pipe that was laid in 1930 at Strathfield, Sydney, Australia. The results of these 3-D finite element analyses are then used to develop a closed-form expression to predict maximum stresses in pipes of different sizes buried in different soil types. Having obtained a good agreement between the proposed model outcomes and the 3-D finite element analysis results, the proposed model has been validated against the field test data under different internal and external loadings. The verified outcomes of the model reveal that it can be used to predict maximum stresses without conducting a full-scale finite element analysis, which often requires specific computational resources and computational skills. Furthermore, the proposed model can be used in probabilistic analyses, where a large number of calculations need to be carried out to account for the uncertainty of the input variables. The applications of the model are also discussed in relation to the assessment of pipe performance and remaining safe life.

Quantitative Study of Coupled Effect of Soil Acidity and Saturation on Corrosion and Microstructure of Buried Cast Iron

Publisher: American Society of Civil Engineers (ASCE)

Date: 08-2019

DOI: 10.1061/(ASCE)MT.1943-5533.0002853

Permeability Degradation of Stressed Concrete Considering Concrete Plasticity

Publisher: American Society of Civil Engineers (ASCE)

Date: 09-2020

DOI: 10.1061/(ASCE)MT.1943-5533.0003327

A multi-component model for expansive soils with different mineral compositions

Publisher: Canadian Science Publishing

Date: 08-2023

DOI: 10.1139/CGJ-2022-0601

Abstract: The accurate prediction of swelling deformation and(or) swelling pressure if confined for expansive soils is essential for a better design and construction of a geotechnical structure that is built on or in an expansive soil. In this paper, we proposed a new method to quantify the swelling strain and(or) swelling pressure of expansive soils by considering the mineralogical components and their different swelling properties. The proposed multi-component model employs a tandem combination of different sub-molecular oedometers for different minerals, and the total swelling strain of soil was calculated by integrating the swelling strain of each mineral. A linear relationship between potential energy and swelling strain is identified based on molecular dynamics’ simulation, which is then incorporated into the diffuse double-layer theory to calculate the relationship between confining pressure and swelling strain for each mineral. The numerical model was then validated by experimental results from the literature, which shows a good agreement with the experimental data in the literature. This model provides a cost-effective way to estimate the swelling behavior of expansive soil.

Undrained load-displacement behavior of partially embedded pipeline on seabed

Publisher: American Society of Civil Engineers (ASCE)

Date: 02-2016

DOI: 10.1061/(ASCE)PS.1949-1204.0000214

3D FE Analyses of Buried Pipeline with Elbows Subjected to Lateral Loading

Publisher: American Society of Civil Engineers (ASCE)

Date: 10-2011

DOI: 10.1061/(ASCE)GT.1943-5606.0000508

Investigation of Enzyme–Based Soil Stabilization in Field Application

Publisher: American Society of Civil Engineers (ASCE)

Date: 05-2023

DOI: 10.1061/(ASCE)MT.1943-5533.0004742

Optimization of Enzyme-Based Soil Stabilization

Publisher: American Society of Civil Engineers (ASCE)

Date: 05-2020

DOI: 10.1061/(ASCE)MT.1943-5533.0003124

A Modified Mohr-Coulomb Model to Simulate the Response of Buried Pipes Subjected to Large Ground Displacement

Publisher: American Society of Civil Engineers

Date: 08-08-2016

DOI: 10.1061/9780784480120.042

Uplift Resistance of Buried Pipelines in Dry and Unsaturated Sands: Comparison of Analytical and FE Model Results with Large-Scale Test Data

Publisher: American Society of Civil Engineers

Date: 08-08-2016

DOI: 10.1061/9780784480120.032

Effect of Soil's Acidity and Saturation on Degradation of Fracture Toughness of Buried Cast Iron

Publisher: American Society of Civil Engineers (ASCE)

Date: 07-1970

DOI: 10.1061/(ASCE)MT.1943-5533.0003258

Soil-Pipeline Interaction in Unsaturated Soils

Publisher: Wiley

Date: 28-02-2013

DOI: 10.1002/9781118616871.CH13

Contribution of cement mortar lining to structural capacity of cast iron water mains

Publisher: American Concrete Institute

Date: 06-2016

DOI: 10.14359/51688702

Numerical and experimental study of uplift mobilization of buried pipelines in sands

Publisher: American Society of Civil Engineers (ASCE)

Date: 02-2015

DOI: 10.1061/(ASCE)PS.1949-1204.0000179

A Viable Solution for Industrial Waste Ash: Recycling in Fired Clay Bricks

Publisher: American Society of Civil Engineers (ASCE)

Date: 08-2023

DOI: 10.1061/JMCEE7.MTENG-15165

Monash University

Location: Australia

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RMIT University

Location: Australia

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KW Limited

Location: United Kingdom of Great Britain and Northern Ireland

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State Engineering Corporation

Location: Sri Lanka

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University Of Moratuwa

Location: Sri Lanka

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University Of Cambridge

Location: United Kingdom of Great Britain and Northern Ireland

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Industrial Transformation Research Hubs - Grant ID: IH150100006

Start Date: 12-2016

End Date: 12-2023

Amount: $5,000,000.00

Funder: Australian Research Council

Industrial Transformation Research Hubs - Grant ID: IH200100010

Start Date: 07-2021

End Date: 07-2026

Amount: $5,000,000.00

Funder: Australian Research Council

Industrial Transformation Research Hubs - Grant ID: IH180100010

Start Date: 07-2019

End Date: 06-2025

Amount: $4,918,357.00

Funder: Australian Research Council