Faculty of Science and Technology

Zhalehjoo, Negin

Email: n.zhalehjoo@federation.edu.au

Room: 4W

Phone: +61 3 5122 8462



Negin Zhalehjoo is a Ph.D. student at the Geotechnical and Hydrogeological Engineering Research Group (GHERG), Federation University Australia. She started her Ph.D. in 2014 after she was awarded a Federation University Postgraduate Research Scholarship. Her Ph.D. research project is about developing a nonlinear model for finite element analysis of pavement response. Negin received her BS and MS degrees in civil engineering and geotechnical engineering from the University of Guilan, Iran, in 2010 and 2013, respectively. Negin ranked the second in her master program. Her master research project was about the influence of random heterogeneity of cross-correlated strength parameters on bearing capacity of shallow foundations.


BS, Civil Engineering, University of Guilan, Iran
MS, Geotechnical Engineering, University of Guilan, Iran

Research Topic

Characterisation of the deformation behaviour of unbound granular materials using advanced repeated load triaxial testing

Supervisors: Dr Ali Tolooiyan & Professor Rae Mackay
Industrial Partner: Australian Road Research Board (ARRB Group)

Currently, pavement design process in Australia assumes a linear elastic model or sub-layering rules for the unbound granular materials (base/subbase layers) and fine-grained soils (subgrade layer). This method disregards the nonlinear stress dependency of the materials resilient modulus under repeated transient traffic loads. Nonlinear analysis tends to predict more accurate prediction of the pavement responses, such as stresses, strains, and displacements in the critical components compared to the linear analysis. The objective of this research is to replace the existing linear elastic model with a nonlinear stress-dependent resilient modulus model for the pavement materials to predict the realistic performance of Australian roads pavement and minimise the risk of excessive permanent deformation.