1. Associate Professor, Dept. of Civil Engineering, Univ. of Shanghai for Science and Technology, Shanghai 200093, China.
2. Ph.D. Student, School of Civil Engineering, Univ. of Queensland, Brisbane 4072, Australia.
3. Research Academic, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, No. 21 Lower Kent Ridge Road, Singapore 119077 (corresponding author).
4. Lecturer, School of Civil and Environmental Engineering, Univ. of Technology Sydney, Ultimo, NSW 2007, Australia.