1. Doctoral Candidate, School of Civil and Mechanical Engineering, Dept. of Civil Engineering, Curtin Univ., GPO Box U1987, Perth, WA 6102, Australia (corresponding author).
2. John Curtin Distinguished Professor, School of Civil and Mechanical Engineering, Dept. of Civil Engineering, Curtin Univ., GPO Box U1987, Perth, WA 6102, Australia.
3. Senior Lecturer, School of Built Environment, Dept. of Construction Management, Curtin Univ., GPO Box U1987, Perth, WA 6102, Australia.