1. Postgraduate Student, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
2. Associate Professor, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia (corresponding author).
3. Research Assistant, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
4. Professor, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia.
5. Professor, School of Civil Engineering, Central South Univ., Changsha, Hunan 410075, China.