1. Ph.D. Candidate, School of Civil Engineering, Southeast Univ., Nanjing 210096, China.
2. Associate Professor, School of Engineering, San Francisco State Univ., 1600 Holloway Ave., San Francisco, CA 94132.
3. Professor, Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast Univ., Nanjing 210096, China (corresponding author).