1. Department of Civil Engineering, Curtin University of Technology, Kent Street, Bentley, Perth, Western Australia 6102, Australia
2. Department of Civil Engineering, Curtin University of Technology, Kent Street, Bentley, Perth, Western Australia 6102, Australia (Corresponding author), e-mail: amin.chegenizadeh@curtin.edu.au
3. Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China