1. 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.
3. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, College of Civil Engineering, Southeast Univ., 2 Sipailou, Nanjing 210096, China.
4. Dept. of System Consulting, Aimnext Inc., Minato-Ku, Tokyo 105-0013, Japan.