1. Ph.D. Candidate, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia; Assistant Professor, Dept. of Civil Engineering, Univ. of Baghdad, Baghdad, Iraq.
2. Senior Lecturer in Geotechnical Engineering, Dept. of Infrastructure Engineering, Melbourne School of Engineering, Univ. of Melbourne, Parkville, Melbourne, VIC 3010, Australia (corresponding author).
3. Senior Lecturer, Dept. of Civil Engineering, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia.
4. Professor, Dept. of Civil Engineering, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia.
5. Professor, Dept. of Civil Engineering, Suranaree Univ. of Technology, Nakhon Ratchasima 30000, Thailand; Adjunct Professor, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia.