Associate Professor George Kouretzis

Associate Professor George Kouretzis

Associate Professor

School of Engineering (Civil Engineering)

Bridging the gap

Dr George Kouretzis and his colleagues work towards bridging the gap between research, engineering applications and public benefit, particularly in the area of onshore pipeline networks, the circulatory lifelines of modern society.

Dr George Kouretzis

Motivated by the challenges he faced during his involvement in the design of buried pipelines in problematic areas, Kouretzis' research focuses on increased safety levels and uninterrupted operation of pipeline infrastructure, from mega gas pipelines to local water distribution networks.

Kouretzis and his group examine the behaviour of pipelines crossing soil deposits that are sensitive to environmental and climate change effects, areas susceptible to mine subsidence, or zones of high seismicity. They also investigate the impact of new developments on existing networks, and the detrimental effects that an accidental blast or a terrorist attack may have on a critical lifeline. The goal of all these studies is the same: to understand how onshore pipeline infrastructure will perform under the influence of these natural or anthropogenic hazards, under which circumstances there is a significant risk of failure, and which measures practicing engineers must take to mitigate the probability and the consequences of this failure.

The outcome of these studies is a compilation of practical design tools, charts and simple computer codes that can be readily used by pipeline engineers in their current and future projects. Kouretzis has collaborated with a number of consulting companies in implementing the findings of this research in critical projects, such as the design of high-pressure natural gas pipelines crossing active seismic faults. New construction techniques have been adopted from the insight gained on pipeline behaviour, and these tools are now endorsed by international guidelines on the design of buried pipelines, superseding earlier methods proposed in the 70s and 80s.

Recently, the Australian Research Council awarded a grant to a team to be led by Kouretzis to further delve into the effects of environmental changes on onshore pipelines, with a particular focus on Australian conditions. This 3-year project commencing in 2015 will include the development of a custom-built laboratory apparatus to investigate how buried pipelines interact with their surrounding soil. The team is collaborating with a number of international groups working in the same field, and their long-term aim is to create a national buried pipeline research hub at the University of Newcastle.

Kouretzis obtained a Diploma in Civil Engineering from the Democritus University of Thrace, Greece, and received his MSc and PhD from the School of Civil Engineering of the National Technical University of Athens (NTUA), Greece, in 2005. In the following years, he continued his engagement with NTUA's School of Civil Engineering, first as a post-doctoral researcher and later as a part-time lecturer. After a four-year period where he was primarily engaged with industry-related activities, George joined the University of Newcastle and the Centre of Excellence for Geotechnical Science and Engineering 2012 and currently holds a senior lecturer position in the School of Engineering.

In parallel with his research on buried pipelines, Kouretzis is working on various problems in the areas of soil-structure interaction, computational geomechanics, geotechnical earthquake engineering and soft soil testing techniques. He has published over 35 papers in monographs, refereed journals and peer-reviewed conference proceedings on the analysis of buried pipelines affected by geohazards, the aseismic design of tunnels and the numerical simulation of large deformation problems in geomechanics. His research has attracted substantial funding from government as well as industry sources, and he has been involved in several projects as project leader and chief investigator. Kouretzis also serves as associate editor of Canadian Geotechnical Journal and as guest editor of Australian Geomechanics. He is also an active reviewer for a number of international journals, and member of the review panel of international funding bodies.

Parallel to his academic activities, since 2000 Dr Kouretzis has been involved as an expert engineering consultant in a series of major energy and transportation infrastructure projects, including high- and medium-pressure natural gas and crude oil pipeline networks, bridges and motorway tunnels in areas of high seismicity, critical runway embankments etc. He is also an active member of the Australian Geomechanics Society, and currently serves as secretary of its NSW-Newcastle Chapter.Finally, Kouretzis is the recipient of a number of awards for research and teaching excellence from organisations including the International Association for Computer Methods and Advances in Geomechanics and the Australian Association of Computational Mechanics.

Dr George Kouretzis

Bridging the gap

Dr George Kouretzis is working towards bridging the gap between research, engineering applications and public benefit, particularly in the area of onshore pip

Read more

Career Summary

Biography

George (Georgios) Kouretzis obtained a Master in Civil Engineering from the Democritus University of Thrace, Greece, followed by an MSc and PhD from the School of Civil Engineering of the National Technical University of Athens (NTUA), Greece in 2005. In the following years, he continued his engagement with the School of Civil Engineering, NTUA first as a post-doctoral researcher and later as a (part-time) lecturer. After a 4-year period where he was primarily engaged with engineering consulting activities, George moved to Australia to join the University of Newcastle in 2012, where he currently holds an Associate Professor position in the School of Engineering. 

His diverse research interests lie in the fields of pipeline engineering, soil-foundation-structure interaction, computational geomechanics, geotechnical earthquake engineering and soft soil testing techniques. He has published over 70 refereed journal papers, peer-reviewed conference papers and book chapters on the analysis of buried pipelines affected by geohazards, the seismic design of tunnels, the simulation of large deformation problems in geomechanics etc. His research has attracted substantial funding from governmental as well as industry sources, and he has been involved in several projects as project leader and chief investigator. He is currently affiliated with the Priority Research Centre of Excellence for Geotechnical Science of the University of Newcastle as a principal researcher. In parallel he serves as an associate editor of the Canadian Geotechnical Journal, sits on the editorial board of Computers and Geotechnicsand has served as a guest editor of special issues published in the Canadian Geotechnical Journal and Australian Geomechanics. He is also an active reviewer for a number of international journals, and serves as an expert assessor for international funding bodies including the US National Science Foundation NSF, the UK Engineering and Physical Sciences Research Council EPSRC, the Australian Research Council ARC etc.

Parallel to his academic activities, he has been involved since 2000 as an expert engineering consultant in a series of major energy and transportation infrastructure projects, including high- and medium-pressure natural gas and crude oil pipeline networks, bridges and motorway tunnels in areas of high seismicity, critical runway embankments etc. He is also an active member of the Australian Geomechanics Society and of the New South Wales-Newcastle Chapter committee, on which he served as Secretary from 2014 until 2016.

Finally, Kouretzis is the recipient of a number of awards for research and teaching excellence from the International Association for Computer Methods and Advances in Geomechanics IACMAG, the Australian Association of Computational Mechanics ACCM etc.

Qualifications

  • PhD (Geotechnical Engineering), National Technical University of Athens - Greece
  • Diploma of Civil Engineering, Democritus University of Thrace - Greece
  • Master of Science (Engineering), National Technical University of Athens - Greece

Keywords

  • Computational geomechanics
  • Geotechnical earthquake engineering
  • Pipelines
  • Soil Dynamics

Fields of Research

Code Description Percentage
090501 Civil Geotechnical Engineering 85
090506 Structural Engineering 15

Professional Experience

UON Appointment

Title Organisation / Department
Associate Professor University of Newcastle
School of Engineering
Australia

Academic appointment

Dates Title Organisation / Department
1/7/2005 - 1/1/2008 Research Assistant National Technical University of Athens
Geotechnical Division
Greece
1/1/2008 - 1/9/2008 Casual Academic National Technical University of Athens
Geotechnical Division
Greece

Teaching

Code Course Role Duration
CIVL4201 Geotechnical and Geoenvironmental Engineering
Faculty of Engineering and Built Environment- The University of Newcastle
Course Coordinator 1/1/2013 - 31/12/2049
CIVL4571 Geotechnical Engineering Project
Faculty of Engineering and Built Environment- The University of Newcastle
Lecturer 1/1/2017 - 31/12/2049
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Book (1 outputs)

Year Citation Altmetrics Link
2007 Yiouta-Mitra P, Kouretzis G, Bouckovalas G, Sofianos A, Effect of underground structures in earthquake resistant design of surface structures (2007) [A3]

This research deals with the question of whether, and under what circumstances, the presence of underground structures should be taken into account for the earthquake resistant de... [more]

This research deals with the question of whether, and under what circumstances, the presence of underground structures should be taken into account for the earthquake resistant design of neighbouring surface structures. In order to investigate the effect of underground structures on surface seismic motion, a series of dynamic plane-strain numerical analyses were conducted, considering a circular tunnel embedded in a viscoelastic half-space, and a harmonic SV-wave excitation. The numerical methodology, based on the Finite Difference Method, aims at quantifying the effect of the soil medium characteristics, excitation frequency, tunnel diameter, depth of construction, and relative flexibility of the lining compared to that of the surrounding soil. Conclusions contain preliminary criteria identifying the cases when the presence of an underground structure should be considered in the design of a surface structure. Copyright ASCE 2007.

DOI 10.1061/40904(223)16
Citations Scopus - 15

Chapter (2 outputs)

Year Citation Altmetrics Link
2015 Kouretzis GP, Masia MJ, Allen C, 'Structural design codes of Australia and New Zealand: Seismic actions', Encyclopedia of Earthquake Engineering, Springer Science and Business Media, Heidelberg 3604-3617 (2015)
DOI 10.1007/978-3-642-35344-4
Co-authors Mark Masia
2015 Kouretzis G, Ansari Y, Pineda JA, Sheng D, 'Simulation of extreme deformation problems in viscoplastic strain-softening clays with the coupled Eulerian-Lagrangian method.', Jubilee volume: Andreas Anagnostopoulos. 50 years of service at the National Technical University of Athens, Tsotras, Smirnis, Zografou 309-322 (2015) [B1]
Co-authors Jubert Pineda

Journal article (46 outputs)

Year Citation Altmetrics Link
2020 Luan L, Zheng C, Kouretzis G, Ding X, 'Dynamic analysis of pile groups subjected to horizontal loads considering coupled pile-to-pile interaction', Computers and Geotechnics, 117 (2020) [C1]
DOI 10.1016/j.compgeo.2019.103276
Citations Scopus - 2Web of Science - 2
2020 Luan L, Ding X, Zheng C, Kouretzis G, Wu Q, 'Dynamic response of pile groups subjected to horizontal loads', Canadian Geotechnical Journal, 57 469-481 (2020) [C1]
DOI 10.1139/cgj-2019-0031
Citations Scopus - 9Web of Science - 7
2020 Wang K, Zhuang Y, Kouretzis G, Sloan SW, 'Shakedown analysis of ballasted track structure using three-dimensional finite element techniques', Acta Geotechnica, 15 1231-1241 (2020) [C1]
DOI 10.1007/s11440-019-00818-6
Citations Scopus - 1Web of Science - 1
2020 Gan S, Zheng C, Kouretzis G, Ding X, 'Vertical vibration of piles in viscoelastic non-uniform soil overlying a rigid base', Acta Geotechnica, 15 1321-1330 (2020) [C1]
DOI 10.1007/s11440-019-00833-7
Citations Scopus - 1Web of Science - 1
2019 Dehghanpoor A, Thambiratnam D, Chan T, Taciroglu E, Kouretzis G, Li Z, 'Coupled Horizontal and Vertical Component Analysis of Strong Ground Motions for Soil-Pile-Superstructure Systems: Application to a Bridge Pier with Soil-Structure Interaction', JOURNAL OF EARTHQUAKE ENGINEERING, (2019)
DOI 10.1080/13632469.2019.1625829
Citations Web of Science - 1
2019 Salimi Eshkevari S, Abbo AJ, Kouretzis G, 'Bearing capacity of strip footings on layered sands', Computers and Geotechnics, 114 (2019) [C1]
DOI 10.1016/j.compgeo.2019.103101
Citations Scopus - 3Web of Science - 1
2019 Luan L, Zheng C, Kouretzis G, 'Simplified three-dimensional analysis of horizontally vibrating floating and fixed-end pile groups', INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 43 2585-2596 (2019) [C1]
DOI 10.1002/nag.2997
Citations Scopus - 3Web of Science - 1
2019 Eshkevari SS, Abbo AJ, Kouretzis G, 'Bearing capacity of strip footings on sand over clay', CANADIAN GEOTECHNICAL JOURNAL, 56 699-709 (2019) [C1]
DOI 10.1139/cgj-2017-0489
Citations Scopus - 4Web of Science - 2
2019 Zheng C, He R, Kouretzis G, Ding X, 'Horizontal vibration of a cylindrical rigid foundation embedded in poroelastic half-space', Computers and Geotechnics, 106 296-303 (2019) [C1]
DOI 10.1016/j.compgeo.2018.11.009
2019 Lester AM, Kouretzis GP, Sloan SW, 'Finite element modelling of prefabricated vertical drains using 1D drainage elements with attached smear zones', Computers and Geotechnics, 107 235-254 (2019) [C1]
DOI 10.1016/j.compgeo.2018.09.007
Co-authors Alexander Lester
2019 Luan L, Zheng C, Kouretzis G, Cao G, Zhou H, 'Development of a three-dimensional soil model for the dynamic analysis of end-bearing pile groups subjected to vertical loads', INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 43 1784-1793 (2019) [C1]
DOI 10.1002/nag.2932
Citations Scopus - 4Web of Science - 3
2019 Zhao Z, Kouretzis G, Sloan SW, Gao Y, 'Effect of geometric nonlinearity on the ultimate lateral resistance of piles in clay', Computers and Geotechnics, 105 110-115 (2019) [C1]
DOI 10.1016/j.compgeo.2018.09.009
Citations Scopus - 1Web of Science - 1
2019 Zheng C, Gan S, Kouretzis G, Luan L, Ding X, 'Dynamic analysis of an axially loaded pile embedded in elastic-poroelasitc layered soil of finite thickness', INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 44 533-549 (2019) [C1]
DOI 10.1002/nag.3036
2018 Zheng C, Ding X, Kouretzis G, Liu H, Sun Y, 'Three-dimensional propagation of waves in piles during low-strain integrity tests', GEOTECHNIQUE, 68 358-363 (2018) [C1]
DOI 10.1680/jgeot.16.T.040
Citations Scopus - 1Web of Science - 1
2018 Kelly RB, Sloan SW, Pineda JA, Kouretzis G, Huang J, 'Outcomes of the Newcastle symposium for the prediction of embankment behaviour on soft soil', Computers and Geotechnics, 93 9-41 (2018) [C1]
DOI 10.1016/j.compgeo.2017.08.005
Citations Scopus - 17Web of Science - 18
Co-authors Jubert Pineda, Jinsong Huang
2018 Ansari Y, Kouretzis G, Sloan SW, 'Development of a prototype for modelling soil-pipe interaction and its application for predicting uplift resistance to buried pipe movements in sand', CANADIAN GEOTECHNICAL JOURNAL, 55 1451-1474 (2018) [C1]
DOI 10.1139/cgj-2017-0559
Citations Scopus - 3Web of Science - 2
2017 Ding X, Zheng C, Liu H, Kouretzis G, 'Resistance of inner soil to the horizontal vibration of pipe piles', Journal of Engineering Mechanics, 143 (2017) [C1]
DOI 10.1061/(ASCE)EM.1943-7889.0001353
Citations Scopus - 1
2017 Zheng C, Liu H, Ding X, Kouretzis G, 'Resistance of inner soil to the vertical vibration of pipe piles', SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 94 83-87 (2017) [C1]
DOI 10.1016/j.soildyn.2017.01.002
Citations Scopus - 4Web of Science - 4
2017 Kouretzis G, Pineda J, Krabbenhøft K, Wilson L, 'Interpretation of vane shear tests for geotechnical stability calculations', Canadian Geotechnical Journal, 54 1775-1780 (2017) [C1]
DOI 10.1139/cgj-2017-0209
Citations Scopus - 4Web of Science - 3
Co-authors Jubert Pineda
2017 Zhao Z, Kouretzis G, Sloan S, Gao Y, 'Ultimate lateral resistance of tripod pile foundation in clay', Computers and Geotechnics, 92 220-228 (2017) [C1]
DOI 10.1016/j.compgeo.2017.08.012
Citations Scopus - 5Web of Science - 4
2017 Zheng C, Liu H, Ding X, Kouretzis GP, Sloan SW, Poulos HG, 'Non-axisymmetric response of piles in low-strain integrity testing', GEOTECHNIQUE, 67 181-186 (2017) [C1]
DOI 10.1680/jgeot.15.P.193
Citations Scopus - 14Web of Science - 11
2016 Kouretzis GP, Gourvenec SM, 'Editorial: Recent developments in pipeline geotechnics', CANADIAN GEOTECHNICAL JOURNAL, 53 V-V (2016)
DOI 10.1139/cgj-2016-0538
2016 Liu H, Zheng C, Ding X, Kouretzis GP, Sloan SW, 'A revised solution for the horizontal vibration of an end-bearing pile in viscoelastic soil', INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 40 1890-1900 (2016) [C1]
DOI 10.1002/nag.2513
Citations Scopus - 5Web of Science - 4
2016 Zheng C, Kouretzis GP, Ding X, Liu H, Poulos HG, 'Three-dimensional effects in low-strain integrity testing of piles: analytical solution', CANADIAN GEOTECHNICAL JOURNAL, 53 225-235 (2016) [C1]
DOI 10.1139/cgj-2015-0231
Citations Scopus - 25Web of Science - 15
2016 Zheng C, Liu H, Ding X, Kouretzis GP, Sheng D, 'Three-Dimensional Effects in Low-Strain Integrity Testing of Large Diameter Pipe Piles', JOURNAL OF ENGINEERING MECHANICS, 142 (2016) [C1]
DOI 10.1061/(ASCE)EM.1943-7889.0001117
Citations Scopus - 13Web of Science - 11
2015 Kouretzis GP, Karamitros DK, Sloan SW, 'Analysis of buried pipelines subjected to ground surface settlement and heave', CANADIAN GEOTECHNICAL JOURNAL, 52 1058-1071 (2015) [C1]
DOI 10.1139/cgj-2014-0332
Citations Scopus - 21Web of Science - 14
2015 Zheng C, Liu H, Kouretzis GP, Sloan SW, Ding X, 'Vertical response of a thin-walled pipe pile embedded in viscoelastic soil to a transient point load with application to low-strain integrity testing', Computers and Geotechnics, 70 50-59 (2015) [C1]

© 2015 Elsevier Ltd. This paper presents an analytical method to compute the dynamic response of a thin-walled pipe pile due to a vertical transient point load acting on its head.... [more]

© 2015 Elsevier Ltd. This paper presents an analytical method to compute the dynamic response of a thin-walled pipe pile due to a vertical transient point load acting on its head. Inspired from challenges faced during the interpretation of low-strain integrity tests on pipe piles, the proposed method moves beyond the widely used one-dimensional wave theory to consider the asymmetric nature of the problem, and stress wave propagation along both the vertical and circumferential directions. Coupling of pipe pile-viscoelastic soil vibration is considered via modeling the outer and inner soil as a series of infinitesimally thin layers in perfect contact with the pile, and their low-strain properties are directly introduced in the solution. The methodology is validated against numerical results, before discussing the mechanisms governing the dynamic response of the pipe pile-soil system to the impact load, with emphasis on the vertical velocity measured at a hypothetical receiver placed on the pile head. Additional results from a parametric analysis are used to provide insights on the accurate estimation of the arrival time of the receiving wave, and the optimal location of the receiver.

DOI 10.1016/j.compgeo.2015.07.016
Citations Scopus - 20Web of Science - 15
2015 Zhang X, Sheng D, Kouretzis GP, Krabbenhoft K, Sloan SW, 'Numerical investigation of the cylinder movement in granular matter', Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 91 (2015) [C1]

© 2015 American Physical Society. We investigate numerically the mechanisms governing horizontal dragging of a rigid cylinder buried inside granular matter, with particular emphas... [more]

© 2015 American Physical Society. We investigate numerically the mechanisms governing horizontal dragging of a rigid cylinder buried inside granular matter, with particular emphasis on enumerating drag and lift forces that resist cylinder movement. The recently proposed particle finite element method is employed, which combines the robustness of classical continuum mechanics formulations in terms of representing complex aspects of the material constitutive behavior, with the effectiveness of discrete element methods in simulating ultralarge deformation problems. The investigation focuses on the effect of embedment depth, cylinder roughness, granular matter macromechanical properties, and of the magnitude of the cylinder's horizontal displacement on the amplitude of the resisting forces, which are discussed in light of published experimental data. Interpretation of the results provides insight on how the material flow around the cylinder affects the developing resistance, and a mechanism is proposed to describe the development of a steady-state drag force at large horizontal movements of the cylinder.

DOI 10.1103/PhysRevE.91.022204
Citations Scopus - 10Web of Science - 6
2015 Kouretzis GP, Ansari Y, Pineda J, Kelly R, Sheng D, 'Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test', Geotechnique Letters, 5 91-95 (2015) [C1]

This paper presents a study on the amplification of horizontal soil stresses during flat dilatometer test (DMT) blade penetration based on three-dimensional total and effective st... [more]

This paper presents a study on the amplification of horizontal soil stresses during flat dilatometer test (DMT) blade penetration based on three-dimensional total and effective stress numerical analyses, while considering stress-flow coupling and large deformations. The focus here is on saturated clays, and the effect of soil stress history on the horizontal stress index is discussed in detail. The obtained results appear to be in good agreement with published and new field data, leading to the proposal of two new expressions for estimating the overconsolidation ratio and the earth pressure coefficient at rest directly from flat dilatometer tests in estuarine clays.

DOI 10.1680/jgele.15.00026
Citations Scopus - 10Web of Science - 6
Co-authors Jubert Pineda
2015 Zheng C, Kouretzis GP, Sloan SW, Liu H, Ding X, 'Vertical vibration of an elastic pile embedded in poroelastic soil', Soil Dynamics and Earthquake Engineering, 77 177-181 (2015) [C1]

© 2015 Elsevier Ltd. We present an analytical study on the vertical vibration of an elastic pile embedded in poroelastic soil. The poroelastic soil is divided into a homogeneous h... [more]

© 2015 Elsevier Ltd. We present an analytical study on the vertical vibration of an elastic pile embedded in poroelastic soil. The poroelastic soil is divided into a homogeneous half-space underlying the pile base and a series of infinitesimally thin independent layers along its shaft. The dynamic interaction problem is solved by extending a method originally proposed for an embedded rigid foundation. The validity of the derived solution is verified via comparison with existing solutions. Arithmetical examples are used to demonstrate the sensitivity of the vertical pile impedance to the relative rigidity of the two soil parts.

DOI 10.1016/j.soildyn.2015.05.010
Citations Scopus - 16Web of Science - 11
2014 Kouretzis GP, Krabbenhøft K, Sheng D, Sloan SW, 'Soil-buried pipeline interaction for vertical downwards relative offset', Canadian Geotechnical Journal, 51 1087-1094 (2014) [C1]
DOI 10.1139/cgj-2014-0029
Citations Scopus - 16Web of Science - 10
2014 Kouretzis GP, Andrianopoulos KI, Sloan SW, Carter JP, 'Analysis of circular tunnels due to seismic P-wave propagation, with emphasis on unreinforced concrete liners', COMPUTERS AND GEOTECHNICS, 55 187-194 (2014) [C1]
DOI 10.1016/j.compgeo.2013.08.012
Citations Scopus - 17Web of Science - 13
Co-authors John Carter
2014 Ansari Y, Kouretzis GP, Sheng D, 'An effective stress analysis of partially embedded offshore pipelines: Vertical penetration and axial walking', COMPUTERS AND GEOTECHNICS, 58 69-80 (2014) [C1]
DOI 10.1016/j.compgeo.2014.01.011
Citations Scopus - 6Web of Science - 6
2014 Kouretzis GP, Sheng D, Wang D, 'Numerical simulation of cone penetration testing using a new critical state constitutive model for sand', Computers and Geotechnics, 56 50-60 (2014) [C1]

A new perspective on the numerical simulation of cone penetration in sand is presented, based on an enhanced critical state model implemented in an explicit-integration finite ele... [more]

A new perspective on the numerical simulation of cone penetration in sand is presented, based on an enhanced critical state model implemented in an explicit-integration finite element code. Its main advantage, compared to similar studies employing simpler soil models, is that sand compressibility can be described with a single set of model parameters, irrespective of the stress level and the sand relative density. Calibration is based on back-analysis of published centrifuge experiments, while results of the methodology are also compared against independent tests. Additional analyses are performed to investigate sand state effects on cone penetration resistance, in comparison with empirical expressions from the literature. © 2013 Elsevier Ltd.

DOI 10.1016/j.compgeo.2013.11.002
Citations Scopus - 14Web of Science - 13
2014 Hambleton JP, Kouretzis GP, Sloan SW, 'Introduction to the CGSE Special Issue of Australian Geomechanics', Australian Geomechanics, 49 1-2 (2014) [C3]
Co-authors James Hambleton
2014 Kouretzis GP, Sheng D, Wang D, 'Numerical simulation of CPT cone penetration in sand', Applied Mechanics and Materials, 553 416-421 (2014) [C1]

Numerical simulation of cone penetration in sand is performed by means of a computationally efficient critical state model implemented in an explicit-integration finite element co... [more]

Numerical simulation of cone penetration in sand is performed by means of a computationally efficient critical state model implemented in an explicit-integration finite element code. Its main advantage, compared to other published studies employing simpler soil models such as the Drucker-Prager, is that sand compressibility can be described with a single set of model parameters, irrespective of the stress level and the sand relative density. Calibration of the constitutive model is based on back-analysis of published centrifuge tests results, and consequently the predictions of the numerical methodology are compared against independent tests. Additional analyses are performed for proposing a new simplified formula to correlate the cone penetration resistance with the in situ sand relative density. © (2014) Trans Tech Publications, Switzerland.

DOI 10.4028/www.scientific.net/AMM.553.416
Citations Scopus - 1
2014 Kouretzis G, Ansari Y, Pineda J, Sheng D, 'Experimental and numerical investigation of rate and softening effects on the undrained shear strength of Ballina clay', Australian Geomechanics Journal, 49 51-57 (2014) [C1]
Citations Scopus - 3
Co-authors Jubert Pineda
2013 Kouretzis GP, Sheng D, Sloan SW, 'Sand-pipeline-trench lateral interaction effects for shallow buried pipelines', Computers and Geotechnics, 54 53-59 (2013) [C1]

A large-deformation numerical methodology is applied to simulate the interaction effects for a pipeline installed in a trench backfilled with loosely deposited dry sand, focusing ... [more]

A large-deformation numerical methodology is applied to simulate the interaction effects for a pipeline installed in a trench backfilled with loosely deposited dry sand, focusing on shallow buried pipelines subjected to lateral displacements relative to the surrounding soil. Based on the backfill-pipeline deformation mode under shallow embedment conditions, described in previous experimental studies, analyses are performed while considering only the critical state shear strength parameters of the backfill. The numerical methodology is validated against experimental full-scale test measurements from the literature, for pipelines buried in uniform dry loose and medium sand. Parametric analyses are performed to generate approximate formulas and charts for calculating (i) the maximum force on the pipeline and (ii) the minimum trench dimensions to eliminate interaction with the surrounding natural ground. Application of the proposed approach in the prediction of independent full-scale test results for a pipeline embedded in a shallow trench demonstrates its effectiveness, and underlines the effect of trench dimensioning on the response of the pipeline. © 2013 Elsevier Ltd.

DOI 10.1016/j.compgeo.2013.05.008
Citations Scopus - 26Web of Science - 21
2013 Kouretzis GP, Sloan SW, Carter JP, 'Effect of interface friction on tunnel liner internal forces due to seismic S- and P-wave propagation', SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 46 41-51 (2013) [C1]
DOI 10.1016/j.soildyn.2012.12.010
Citations Scopus - 38Web of Science - 31
Co-authors John Carter
2011 Karamitros DK, Bouckovalas GD, Kouretzis G, Gkesouli V, 'An analytical method for the strength verification of buried steel pipelines at normal fault crossings', Soil Dynamics and Earthquake Engineering, 31 1452-1464 (2011) [C1]
DOI 10.1016/j.soildyn.2011.05.012
Citations Scopus - 67Web of Science - 53
2011 Kouretzis G, Bouckovalas GD, Karamitros DK, 'Seismic verification of long cylindrical underground structures considering Rayleigh wave effects', Tunnelling and Underground Space Technology, 26 789-794 (2011) [C1]
DOI 10.1016/j.tust.2011.05.001
Citations Scopus - 13Web of Science - 11
2007 Kouretzis GP, Bouckovalas GD, Gantes CJ, 'Analytical calculation of blast-induced strains to buried pipelines', INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 34 1683-1704 (2007) [C1]
DOI 10.1016/j.ijimpeng.2006.08.008
Citations Scopus - 42Web of Science - 29
2007 Karamitros DK, Bouckovalas GD, Kouretzis GP, 'Stress analysis of buried steel pipelines at strike-slip fault crossings', SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 27 200-211 (2007) [C1]
DOI 10.1016/j.soildyn.2006.08.001
Citations Scopus - 173Web of Science - 138
2006 Kouretzis GP, Bouckovalas GD, Gantes CJ, '3-D shell analysis of cylindrical underground structures under seismic shear (S) wave action', SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 26 909-921 (2006) [C1]
DOI 10.1016/j.soildyn.2006.02.002
Citations Scopus - 47Web of Science - 40
2002 Bouckovalas GD, Kouretzis GP, Kalogeras IS, 'Site-specific analysis of strong motion data from the September 7, 1999 Athens, Greece earthquake', NATURAL HAZARDS, 27 105-131 (2002) [C1]
DOI 10.1023/A:1019960023266
Citations Scopus - 8Web of Science - 5
2001 Bouckovalas GD, Kouretzis GP, 'Stiff soil amplification effects in the 7 September 1999 Athens (Greece) earthquake', SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 21 671-687 (2001) [C1]
DOI 10.1016/S0267-7261(01)00045-8
Citations Scopus - 25Web of Science - 21
Show 43 more journal articles

Review (1 outputs)

Year Citation Altmetrics Link
2014 George P Kouretzis, Mark J Masia, Clive Allen, 'Structural Design Codes of Australia and New Zealand: Seismic Actions (2014) [D1]
DOI 10.1007/978-3-642-36197-5_120-1
Co-authors Mark Masia

Conference (6 outputs)

Year Citation Altmetrics Link
2019 Bouckovalas G, Kouretzis G, 'Analysis of buried oil and gas pipelines crossing active faults: Revisiting pipe-ground interaction', Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019, Rome, Italy (2019) [E1]
DOI 10.1201/9780429031274
2018 Lester AM, Kouretzis G, Sloan S, 'A new method for finite element modelling of prefabricated vertical drains', Numerical Methods in Geotechnical Engineering IX. Proceedings of the 9th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2018), Porto, Portugal (2018) [E1]
Citations Scopus - 1
Co-authors Alexander Lester
2017 Graham D, Shi Z, Hambleton JP, Kouretzis GP, 'Limit loads for pipelines and cylinders partially embedded in frictional materials', 51st US Rock Mechanics / Geomechanics Symposium 2017, San Francisco, CA (2017) [E1]
Co-authors James Hambleton
2017 Kelly R, Sloan S, Pineda J, Huang J, Kouretzis G, Carter J, 'Performance of a trial embankment at the Ballina soft soil Field Testing Facility', Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017, Seoul, Korea (2017) [E1]
Co-authors Jinsong Huang, John Carter, Jubert Pineda
2016 Wilson LJ, Kouretzis GP, Pineda JA, Kelly RB, 'On the determination of the undrained shear strength from vane shear testing in soft clays', Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016, Gold Coast, QLD (2016) [E1]
Citations Scopus - 1
Co-authors Jubert Pineda
2014 Ansari Y, Kouretzis GP, Sheng D, 'Coupled finite element analysis of partially embedded offshore pipelines during vertical penetration', Applied Mechanics and Materials (2014) [E1]

Diverse vertical embedment response is observed for partially embedded pipelines when experimentally tested under similar initial and boundary conditions. Although vertical resist... [more]

Diverse vertical embedment response is observed for partially embedded pipelines when experimentally tested under similar initial and boundary conditions. Although vertical resistance of pipelines is presented through simple analytical solutions, a number of factors contribute to complications in implementing these theories into practice. The objectives of this research is to provide a more detailed investigation on the vertical embedment for the partially-embedded pipelines (PEPs) using a coupled large deformation finite element (CLDFE) analysis with contact. A modified Cam Clay (MCC) model represents the elastoplastic response of the soil. The model of pipeline embedment investigates the effect of drainage condition on heave forming with respect to rate of penetration. Besides, effect of frictional contact on the heave development and wedging effect is investigated and design-related considerations are proposed. It is shown that depending on the rate of pipeline penetration and soil consolidation rate, the pipeline penetration response can be categorised as undrained, partially drained or fully drained. © (2014) Trans Tech Publications, Switzerland.

DOI 10.4028/www.scientific.net/AMM.553.428
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Other (1 outputs)

Year Citation Altmetrics Link
2014 Hambleton JP, Kouretzis GP, Sloan SW, 'Introduction to the CGSE Special Issue of Australian Geomechanics', ( issue.4 pp.1-2): The Australian Geomechanics Society (2014)
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Grants and Funding

Summary

Number of grants 8
Total funding $1,148,964

Click on a grant title below to expand the full details for that specific grant.


20201 grants / $203,820

Modelling the onset of fracture-induced instabilities for underground mining applications$203,820

Funding body: Australian Coal Research Limited

Funding body Australian Coal Research Limited
Project Team Professor Anna Giacomini, Associate Professor George Kouretzis, Doctor Mason Crumpton
Scheme Australian Coal Association Research Program (ACARP)
Role Investigator
Funding Start 2020
Funding Finish 2021
GNo G1900859
Type Of Funding C1700 - Aust Competitive - Other
Category 1700
UON Y

20191 grants / $12,763

Numerical Modelling of long wall mining stability$12,763

Funding body: Strata2 Pty Ltd

Funding body Strata2 Pty Ltd
Project Team Associate Professor George Kouretzis, Professor Anna Giacomini
Scheme Small Research Consultancy
Role Lead
Funding Start 2019
Funding Finish 2019
GNo G1900340
Type Of Funding C3111 - Aust For profit
Category 3111
UON Y

20181 grants / $382,757

Large-scale geotechnical analysis of new and aged pipeline infrastructure$382,757

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Associate Professor George Kouretzis, Lprof SCOTT Sloan
Scheme Discovery Projects
Role Lead
Funding Start 2018
Funding Finish 2020
GNo G1700270
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20161 grants / $5,000

Seismic response of large diameter offshore FRP pipelines$5,000

Funding body: AWE Environmental Systems Pte Ltd

Funding body AWE Environmental Systems Pte Ltd
Project Team Associate Professor George Kouretzis
Scheme Small Research Consultancy
Role Lead
Funding Start 2016
Funding Finish 2016
GNo G1600936
Type Of Funding C3211 - International For profit
Category 3211
UON Y

20151 grants / $479,624

Unsaturated soil-structure interaction with emphasis on buried pipelines$479,624

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Associate Professor George Kouretzis, Prof DAICHAO Sheng, Associate Professor Kristian Krabbenhoft
Scheme Discovery Projects
Role Lead
Funding Start 2015
Funding Finish 2017
GNo G1400255
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

20142 grants / $60,000

Research of partial embedment of pipelines and study of pipeline 3D lateral buckling analysis$40,000

Funding body: Hyundai Heavy Industries

Funding body Hyundai Heavy Industries
Project Team Associate Professor George Kouretzis, Prof DAICHAO Sheng, Lprof SCOTT Sloan, Mr Ji Lim
Scheme Visiting Researcher
Role Lead
Funding Start 2014
Funding Finish 2014
GNo G1400118
Type Of Funding International - Non Competitive
Category 3IFB
UON Y

An earthquake shaking table to investigate soil-structure interactions$20,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Associate Professor Adrian Russell, Professor Nasser Khalili, Dr Gaofeng Zhao, Dr Arman Khoshghalb, Lprof SCOTT Sloan, Associate Professor George Kouretzis, Professor Buddhima Indraratna, Dr Cholachat Rujikiatkamjorn, Professor Mark Cassidy, Professor Christophe Gaudin, Professor David Williams, Dr Alexander Scheuermann, Khoshghalb, Dr Arman, Zhao, Dr GaoFeng
Scheme Equipment Grant
Role Investigator
Funding Start 2014
Funding Finish 2018
GNo G1400617
Type Of Funding Internal
Category INTE
UON Y

20131 grants / $5,000

New Staff Grant 2012$5,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Associate Professor George Kouretzis
Scheme New Staff Grant
Role Lead
Funding Start 2013
Funding Finish 2013
GNo G1201169
Type Of Funding Internal
Category INTE
UON Y
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Research Supervision

Number of supervisions

Completed1
Current4

Current Supervision

Commenced Level of Study Research Title Program Supervisor Type
2019 PhD The Phytoremediation of PFAS Contaminated Soil Using Cannabis sativa L. (Hemp) Plants PhD (Environmental Eng), Faculty of Engineering and Built Environment, The University of Newcastle Co-Supervisor
2017 PhD Generalised Pipe-Unsaturated Sand Interaction Modelling PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
2016 PhD Computational Modelling of Hydraulic Fracture PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Co-Supervisor
2015 PhD Advanced Numerical Methods for Predicting the Behaviour of Soft Clay Soils PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor

Past Supervision

Year Level of Study Research Title Program Supervisor Type
2019 PhD Bearing Capacity of Surface Strip Footings on Layered Soils PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
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News

ARC Discovery Project funding success

November 19, 2014

Dr Georgios Kouretizis, Professor Daichao Sheng and Associate Professor Kristian Krabbenhoft have been awarded more than $463,000 in ARC Discovery Project

Associate Professor George Kouretzis

Position

Associate Professor
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Civil Engineering

Contact Details

Email georgios.kouretzis@newcastle.edu.au
Phone (02) 4921 6449

Office

Room EA.207
Building EA Building
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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