1. Research Fellow, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia (corresponding author).
2. Professor, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
3. Senior Lecturer, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
4. Research Officer, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
5. Associate Professor, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.