1. Ph.D. Candidate, School of Civil Engineering, Southeast Univ., Nanjing 210096, China.
2. Lecturer, Depart. of Civil Engineering, Strathclyde Univ., Glasgow, United Kingdom.
3. Professor, Key Laboratory of C & PC Structures of Ministry of Education, School of Civil Engineering, Southeast Univ., Nanjing 210096, China (corresponding author).
4. Associate Professor, School of Civil Engineering, Southeast Univ., Nanjing 210096, China.