1. Lecturer, Dept. of Civil Engineering, Curtin Univ. of Technology, Kent St., Bentley, Perth, WA 6102, Australia (corresponding author).
2. Ph.D. Candidate, Dept. of Civil Engineering, Curtin Univ. of Technology, Kent St., Bentley, Perth, WA 6102, Australia.
3. Undergraduate Student, Dept. of Civil Engineering, Curtin Univ. of Technology, Kent St., Bentley, Perth, WA 6102, Australia.
4. Professor, Dept. of Civil Engineering, Curtin Univ. of Technology, Kent St., Bentley, Perth, WA 6102, Australia.