1. Lecturer, Key Laboratory of C&PC Structures of Ministry of Education, Southeast Univ., Nanjing 210096, China.
2. Lecturer, Dept. of Civil Engineering, Strathclyde Univ., Glasgow G12 8QQ, U.K.
3. Professor, Key Laboratory of C&PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast Univ., Nanjing 210096, China (corresponding author).
4. Associate Professor, School of Civil Engineering, Southeast Univ., Nanjing 210096, China.