1. Ph.D. Candidate, Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, College of Civil Engineering, Southeast Univ., 2 Sipailou, Nanjing 210096, China (corresponding author).
2. Professor, Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, College of Civil Engineering, Southeast Univ., 2 Sipailou, Nanjing 210096, China.