Mehdi Aghayarzadeh is PhD candidate in Geotechnical Engineering at the School of Civil and Environmental Engineering, University of Technology, Sydney (UTS).
His master thesis was about numerical modelling of Geosynthetic reinforced soil walls and published some papers in different literature including Australian Journal of Civil Engineering (AJCE). After graduation, between 2010 and 2015, he was involved in designing of many structural and geotechnical engineering projects and worked as sell engineer in the agency of Maccaferri company (one of the most important companies in Geosynthetic products) in Iran. In 2015, gained International Research Scholarship (IRS) and started his PhD research project on September 2015. His research has focused on the theoretical and numerical analysis of dynamic pile load testing using finite element and finite difference software. He has published some papers in this field and his recent paper has nominated to publish in Journal of Geotechnical and Geoenvironmental Engineering (ASCE).
Mehdi is a member of Deep Foundation Institute (DFI), Pile Driving Contractor Association (PDCA) and International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE).
- Member of Deep Foundation Institute (DFI)
- Member of Pile Driving Contractor Association (PDCA)
- Member of International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
- Member of Iranian Geotechnical Society (IGS)
- Member of Alborz Organization for Engineering
- UTS International Research Scholarship
- Deep Foundations
- Static and Dynamic Pile Load Testing
- Numerical Modelling in Geotechnical Engineering
- Reinforced Soil Systems
- Geotechnical Engineering
- Soil Mechanics
- Advanced Soil Mechanics and Foundation Engineering
- Mechanics of Solids
- Engineering Mechanics
- Structural Analysis
Working as SRS Peer Tutor for subjects Mechanics of Solid, Engineering Mechanics and Structural Analysis in Student Service Unit of UTS from January 2016 until now (Project Officer: Tanya Vavilova)
Working as Tutor of Mechanics of Solids in UTS from March 2016 until now (Subject coordinator: Dr. Yancheng Li
Working as Marker of Geotechnical Engineering in UTS from March 2016 until now (subject coordinator: Dr. Hadi Khabbaz)
Working as Marker and Tutor of Engineering Mechanics in UTS from Spring 2017 until now (Subject Coordinator: Dr. Anne Gardner)
Working as Tutor of Mechanics of Solids, Engineering Mechanics and Autocad software in UTS Housing, during the Autumn semester 2016 (Academic and Communities Learning Officer: Andrew Redgrave)
Rowshanzamir, MA & Aghayarzadeh, M 2015, 'Comprehensive study of geogrid-reinforced soil retaining walls with tilted face and reinforcements', Australian Journal of Civil Engineering, vol. 13, no. 1, pp. 48-63.View/Download from: Publisher's site
© 2016 Engineers Australia. Using FLAC3D software, a comprehensive study was carried out on geogrid-reinforced soil (GRS) retaining walls with various oblique angles of reinforcement layers as well as tilted face to achieve optimum design alternatives. In this context, several models of GRS retaining walls with different configurations including vertical reinforced block (conventional wall), reinforced blocks with inclined face (batter wall) and oblique reinforced blocks (rotated against natural backfill) were numerically analysed under gravity load conditions. The analyses results indicated that batter walls present better performance than conventional vertical walls in terms of reduction in wall deformations, tensile force of reinforcing elements and backfill settlement. Meanwhile, a limited rotation of the reinforced block towards backfill caused more improvement in the wall performance. As a case of practical applications, a 12° rotation of reinforced block against the backfill caused 44% reduction in the maximum tension force of reinforcement. The analyses results indicated that using an optimum tilted face with an oblique reinforced block may allow a significant reduction in the amount of reinforcement in comparison to conventional GRS walls. Furthermore, it was found that the oblique reinforced blocks present higher sliding stability in comparison to conventional reinforcement blocks.
Aghayarzadeh, M, Khabbaz, H & Fatahi, B 1970, 'Evaluation of Reaction Piles Effect on Test Piles in Static Load Testing Using 3-D Numerical Analysis', International Conference on Stress Wave Theory and Testing Methods for Deep Foundations, San Diego, California, USA.View/Download from: UTS OPUS
Static load testing includes the direct measurement of pile head displacements when a physical test load is applied. It is known as the most fundamental form of pile load testing, and generally considered as a benchmark for pile performance assessment. During static load testing, the load is commonly applied using a hydraulic jack acting against a reaction beam, which is restrained by an anchorage system. The anchorage system may be in the form of cable anchors or reaction piles installed into the ground to provide tension resistance. In this paper, PLAXIS 3D software incorporating elastic-perfectly-plastic Mohr-Coulomb and hardening-soil constitutive models is initially used to simulate a real static load test conducted in stiff overconsolidated clay. Then, in order to assess the effect of the reaction system on the test results, a similar model using the hardening soil model is simulated. In the three-dimensional model, different numbers of reaction piles, identical to the test pile are located in different distances from the test pile. Subsequently, the influences of spacing, length, diameter of reaction piles, and type of reaction piles on the load - displacement behavior of test piles are assessed. This paper can provide insight to practicing civil engineers on how to design the loading systems for static pile load tests.
Aghayarzadeh, M, Khabbaz, H & Fatahi, B 2018, 'Numerical analysis of concrete piles driving in saturated dense and loose sand deposits', European Conference on Numerical Methods in Geotechnical Engineering, CRC Press, Porto, Portugal.View/Download from: UTS OPUS
Aghayarzadeh, M, Khabbaz, H & Fatahi, B 2018, 'Evaluation of Concrete Bored Piles Behaviour in Saturated Loose and Dense Sand During the Static Load Testing', New Developments in Materials for Infrastructure Sustainability and the Contemporary Issues in Geo-environmental Engineering, GeoChina International Conference, Springer, Hangzhou, China, pp. 75-89.View/Download from: UTS OPUS or Publisher's site
Diversity of construction methods is available for the installation of piles; and generally piles are classified into two main groups in terms of their installation method, including non-displacement piles and displacement piles. However, non-displacement piles such as bored piles or drilled shafts cause less disruption to adjacent soil compared to displacement piles. Knowing the behaviour of piles, the load-displacement curve has an important role during the pile load testing. In this study, firstly, the background and concepts of three different constitutive soil models including Mohr-Coulomb, Hardening Soil and Hypoplastic models are discussed. Secondly, using these soil models and finite element software PLAXIS, the load carrying capacity of a single bored pile in saturated dense and loose sand are evaluated. Finally, different factors affecting load-displacement curve including Hypoplastic model parameters are assessed. The most important aim of this study is comparing the capability of different soil models to capture the large strain behaviour observed during the static load testing. The results revealed that all three soil models indicate a reasonable correlation to each other, except when the 'Intergranular Strain' concept, defined in Hypoplastic model, is activated. This paper can be useful for the practicing engineers to identify the effect of different soil models in numerical simulation of static pile load testing.
Aghayarzadeh, M, Khabbaz, H, Fatahi, B & Terzaghi, S 2017, 'Continuum Numerical Modelling Of Dynamic Load Test For Steel Pipe Piles', Proceedings of the International Conference On Advancement of Pile Technology and Pile Case Histories, International Conference On Advancement of Pile Technology and Pile Case Histories, Universitas Katolik Parahyangan, Bali, Indonesia, pp. 1-10.View/Download from: UTS OPUS
In order to estimate the static axial capacity of driven piles, one-dimensional wave equation
analysis was proposed in 1960, in which pile is simulated by a number of masses attached to each other using
elastic springs, sliders and linear viscous dampers to simulate the visco-elasto-plastic response of the soil. Later,
the signal matching technique program, CAPWAP, employing this model, was proposed to overcome the
shortcomings of the conventional model. The main objective of this paper is to assess capabilities of so-called
continuum numerical model in analyzing dynamic pile load test. In this paper, the static and dynamic load tests
of an open-ended steel pipe pile driven into dense sand have been simulated using PLAXIS 2D finite element
software. After carrying out a number of numerical analyses the results of numerical simulation have been
compared to static load test results. The capabilities and challenges of the continuum numerical analysis to
simulate dynamic pile testing of steel pipe piles are briefly discussed.