All Outputs (23)

What Can Grading Entropy Tell Us About Soil Fabric? (2022)
Presentation / Conference Contribution
Leak, J., Barreto, D., & Dimitriadi, V. (2022, December). What Can Grading Entropy Tell Us About Soil Fabric?. Paper presented at 19th Annual Geomechanics Form Micro to Macro Conference, London

These slides were presented at the 19th annual geomechanics form micro to macro conference at Imperial College London in 2022. They detail an investigation into characterising soil fabric effects using the normalised entropy coordinates proposed by L... Read More about What Can Grading Entropy Tell Us About Soil Fabric?.

Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates (2022)
Journal Article
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2022). Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates. Geotechnics, 2(4), 1109-1126. https://doi.org/10.3390/geotechnics2040052

Particle breakage in soils is a well-recognised behaviour. Conventional methods for quantifying the breakage process rely on calculating the area between the particle size distribution (PSD) curves produced before and after crushing. A key aspect of... Read More about Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates.

A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles (2021)
Presentation / Conference Contribution
Leak, J., Barreto, D., & Dimitriadi, V. (2021, December). A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles. Paper presented at 18th Annual Geomechanics From Micro to Macro Conference, Dundee

These slides were presented at the 18th annual geomechanics from micro to macro conference in 2021 at the university of Dundee. They detail a study on the effect of inherent variability on soil parameters (such as initial void ratio, peak stress etc.... Read More about A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles.

Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach (2020)
Presentation / Conference Contribution
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2020, December). Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach. Paper presented at 17th Annual Geomechanics From Micro to Macro Conference, Online

These slides were presented at the 17th annual geomechanics from micro to macro conference in 2020. They detail the comparison of the well known, and commonly used, relative breakage parameter used to assess the degree of particle breakage in soils.... Read More about Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach.

Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms (2019)
Journal Article
Fonseca, J., Riaz, A., Bernal-Sanchez, J., Barreto Gonzalez, D., McDougall, J., Miranda Manzanares, M., Marinelli, A., & Dimitriadi, V. (2019). Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms. Géotechnique Letters, 9(4), 1-6. https://doi.org/10.1680/jgele.18.00221

Sand-rubber mixture (SRm) behaviour is affected by rubber content (RC) whilst dissipation in sands is caused by inter-particle sliding. Dissipation in SRm is as, or more significant than in sands. However, the mechanisms of dissipation in SRm are not... Read More about Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms.

Design and evaluation of earthquake risk reduction measures in unplanned urban areas (2018)
Presentation / Conference Contribution
Dimitriadi, V. (. (2018, September). Design and evaluation of earthquake risk reduction measures in unplanned urban areas. Paper presented at Geohazard Risk Reduction in Unplanned Urban Areas, Caldas Novas, Brazil

Unplanned urbanization is an increasing trend worldwide and usually the built environment in such areas is exposed to various natural hazards, such as earthquakes, floods, landslides etc. Considering the severe earthquake-induced damages in unplanned... Read More about Design and evaluation of earthquake risk reduction measures in unplanned urban areas.

Seismic liquefaction performance of strip foundations: Effect of ground improvement dimensions (2017)
Journal Article
Dimitriadi, V. E., Bouckovalas, G. D., Chaloulos, Y. K., & Aggelis, A. S. (2018). Seismic liquefaction performance of strip foundations: Effect of ground improvement dimensions. Soil Dynamics and Earthquake Engineering, 106, 298-307. https://doi.org/10.1016/j.soildyn.2017.08.021

Evidence from field case studies, as well as from experimental and theoretical research, suggest that the detrimental effects of seismic liquefaction on the performance of surface foundations on level ground may be mitigated in presence of a non-liqu... Read More about Seismic liquefaction performance of strip foundations: Effect of ground improvement dimensions.

Seismic performance of strip foundations on liquefiable soils with a permeable crust (2017)
Journal Article
Dimitriadi, V., Bouckovalas, G., & Papadimitriou, A. (2017). Seismic performance of strip foundations on liquefiable soils with a permeable crust. Soil Dynamics and Earthquake Engineering, 100, 396-409. https://doi.org/10.1016/j.soildyn.2017.04.021

Modern seismic codes dictate that the use of shallow foundations on liquefiable soils may be considered only after appropriate ground improvement. No further instructions are given regarding the improvement depth, or what changes if the surface layer... Read More about Seismic performance of strip foundations on liquefiable soils with a permeable crust.

GEER/EERI/ATC Earthquake Reconnaissance, January 26th/February 2nd, 2014 Cephalonia, Greece Events. Version 1: June 6, 2014 (2014)
Report
Papazachos, C., Pavlides, S., Chatzipetros, A., Papathanassiou, G., Valkaniotis, S., Pitilakis, D., Karatzetzou, A., Pitilakis, K., Mouratidis, K., Sextos, A., Klimis, N., Psaroudakis, M., Assimaki, D., Parcharidis, I., Gazetas, G., Vintzilaiou, E., Psycharis, I., Mouzakis, H., Beriatos, T., Garini, E., …Rouchotas, L. (2014). GEER/EERI/ATC Earthquake Reconnaissance, January 26th/February 2nd, 2014 Cephalonia, Greece Events. Version 1: June 6, 2014. Geotechnical Extreme Events Reconnaissance Association

Issues of Geotechnical Engineering and Soil – Monument Interaction (2009)
Report
Bouckovalas, G., Gazetas, G., Pitilakis, K., Konstantopoulos, I., Kavvadas, M., Anastasopoulos, I., & Dimitriadi, V. (2009). Issues of Geotechnical Engineering and Soil – Monument Interaction. Earthquake Planning & Protection Organisation of Greece (E.P.P.O.)

Bouckovalas G., Gazetas G., Pitilakis K., Konstantopoulos I., Kavvadas M., Anastasopoulos I., Dimitriadi V., (2009). “Issues of Geotechnical Engineering and Soil – Monument Interaction”. Co‐financed by the European Centre on Prevention & Forecasting... Read More about Issues of Geotechnical Engineering and Soil – Monument Interaction.

Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach
Presentation / Conference Contribution
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2021, July). Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach. Presented at Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media, Buenos Aires (Virtual), Argentina

It is well recognised that particle breakage in granular materials is affected by stress level, stress path, initial density, and particle size distribution (PSD), amongst others. Furthermore, it has been shown that breakage has a significant influen... Read More about Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach.

Grading entropy coordinates and criteria for evaluation of liquefaction potential
Presentation / Conference Contribution
Barreto Gonzalez, D., Leak, J., Dimitriadi, V., McDougall, J., Imre, E., & Lőrincz, J. (2019, June). Grading entropy coordinates and criteria for evaluation of liquefaction potential. Presented at 7th International Conference on Earthquake Geotechnical Engineering, Rome, Italy

Several methods are commonly used for the evaluation of liquefaction potential in soils. These include criteria based on SPT and CPT tests, shear wave velocity measurements and gradation limits, amongst others. This study applies the concept of gradi... Read More about Grading entropy coordinates and criteria for evaluation of liquefaction potential.

Use of Compaction Grouting as Ground Improvement Technique in Compressible Solid Waste Landfill
Presentation / Conference Contribution
Tsitsas, G., Dimitriadi, V., Barreto, D., & Ciortan, R. (2019, September). Use of Compaction Grouting as Ground Improvement Technique in Compressible Solid Waste Landfill. Presented at The XVII European Conference on Soil Mechanics and Geotechnical Engineering, Reykjavik, Iceland

Ground improvement methods are increasingly being used as means
to control settlements and improve the shear strength of foundation soils. The compaction grouting (CG) method is a ground improvement method that is used as means... Read More about Use of Compaction Grouting as Ground Improvement Technique in Compressible Solid Waste Landfill.

Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels
Presentation / Conference Contribution
Bernal-Sanchez, J., Mcdougall, J., Barreto, D., Marinelli, A., Dimitriadi, V., Anbazhagan, P., & Miranda, M. (2019, June). Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels. Presented at 7th International Conference on Geotechnical Earthquake Engineering, Rome

The dynamic properties of shredded rubber-soil mixtures (ShRm), comprising a sub-rounded quartz sand combined with small rubber shreds at 0, 10, 20, 30% by mass, were investigated. Testing ranged from small strain, in resonant column apparatus, to la... Read More about Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels.

Analysis of strip foundation performance on liquefied ground with limited ground improvement
Presentation / Conference Contribution
Dimitriadi, V., & Bouckovalas, G. (2015, September). Analysis of strip foundation performance on liquefied ground with limited ground improvement. Presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering

According to modern seismic codes, the use of shallow foundations on liquefiable soils is only acceptable after proper ground improvement underneath and around the foundation. Still, there are no widely acceptable guidelines for choosing the required... Read More about Analysis of strip foundation performance on liquefied ground with limited ground improvement.

Numerical analysis of liquefaction affected shallow foundations performance on improved ground.
Presentation / Conference Contribution
Dimitriadi, V., Bouckovalas, G., & Chaloulos, Y. (2015, September). Numerical analysis of liquefaction affected shallow foundations performance on improved ground. Presented at XVI ECSMGE Geotechnical Engineering for Infrastructure and Development

A novel numerical methodology is presented and used to simulate the seismic response of footings on liquefiable ground, locally improved in order to reduce settlements and increase the bearing capacity of the foundation. The numerical simulation adop... Read More about Numerical analysis of liquefaction affected shallow foundations performance on improved ground..

Numerical Evaluation of Lateral Spreading Displacements in layered soils
Presentation / Conference Contribution
Valsamis, A., Bouckovalas, G., & Dimitriadi, V. (2007, June). Numerical Evaluation of Lateral Spreading Displacements in layered soils. Paper presented at 4th International Conference on Earthquake Geotechnical Engineering, Thessaloniki, Greece

The seismic design of earthworks and foundations against liquefaction-induced lateral spreading requires knowledge of the associated maximum ground displacement and its variation with depth. This article focuses upon the numerical predicti... Read More about Numerical Evaluation of Lateral Spreading Displacements in layered soils.

Parametric Investigation of Lateral Spreading in Free‐Face Ground Formations
Presentation / Conference Contribution
Valsamis, A., Bouckovalas, G., & Dimitriadi, V. (2010, May). Parametric Investigation of Lateral Spreading in Free‐Face Ground Formations. Paper presented at 5th International Conference on Recent Advances in Geotechnical Engineering and Soil Dynamics, San Diego, California

Liquefaction-induced lateral spreading can cause extensive damage and even failure to foundations and earthworks resting inside or in the vicinity of the affected ground. The current practice for the evaluation of the ground surface displacement due... Read More about Parametric Investigation of Lateral Spreading in Free‐Face Ground Formations.

Numerical Simulation of Drain Performance in Liquefiable Soils
Presentation / Conference Contribution
Bouckovalas, G., Dimitriadi, V., Tsiapas, Y., & Tsioulou, A. (2011, January). Numerical Simulation of Drain Performance in Liquefiable Soils. Paper presented at 5th International Conference on Earthquake Geotechnical Engineering, Santiago, Chile

Modern approaches for the design of drains for liquefaction mitigation are based on the work of Seed and Booker (1977) for infinitely permeable drains and uniform soil with purely horizontal drainage. More recently, Bouckovalas et al. (2009) revisite... Read More about Numerical Simulation of Drain Performance in Liquefiable Soils.

Gravel Drain Performance in Liquefiable Soils: Numerical Simulation and Applicability
Presentation / Conference Contribution
Bouckovalas, G., Papadimitriou, A., & Dimitriadi, V. (2012, May). Gravel Drain Performance in Liquefiable Soils: Numerical Simulation and Applicability. Paper presented at 2nd International Conference on Performance-Based Design in Earthquake Geotechnical Engineering, Taormina, Italy

Bouckovalas et al. (2009) is the most recent design methodology for drains for liquefaction remediation and is based on the work of Seed and Booker (1977) for infinitely permeable drains and uniform soil with purely horizontal drainage. This paper br... Read More about Gravel Drain Performance in Liquefiable Soils: Numerical Simulation and Applicability.