1. Ph.D. Candidate, Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast Univ., Nanjing 210096, China.
2. Professor, Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast Univ., Nanjing 210096, China (corresponding author).
3. Assistant Professor, Charles E. Via Jr. Dept. of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061.