1. Associate Professor, Key Laboratory of C and PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast Univ., Nanjing 210096, China (corresponding author).
2. Postdoctoral Researcher, Dept. of Structural Engineering, Univ. of California, San Diego, CA 92093.
3. Lecturer, Dept. of Civil Engineering, Strathclyde Univ., Glasgow G12 8QQ, U.K.
4. Professor, National Prestress Engineering Research Center, Southeast Univ., Nanjing 210096, China.