1. Associate Professor, Swinburne Univ. of Technology, John St., Hawthorn, VIC 3122, Australia (corresponding author).
2. Former Ph.D. Student, Swinburne Univ. of Technology, John St., Hawthorn, VIC 3122, Australia.
3. Lecturer, Swinburne Univ. of Technology, John St., Hawthorn, VIC 3122, Australia.
4. Professor, Suranaree Univ. of Technology, Thailand; and CSI Distinguished Geotechnical Fellow, Swinburne Univ. of Technology, John St., Hawthorn, VIC 3122, Australia.