1. Professor, Dept. of Municipal Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China (corresponding author).
2. Graduate Student, Dept. of Municipal Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.
3. Postdoctoral Research Fellow, Dept. of Municipal Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.
4. Professor, Dept. of Civil, Construction and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695.