1. Ph.D. Candidate, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, People’s Republic of China.
2. Professor, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, People’s Republic of China (corresponding author).
3. Lecturer, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, People’s Republic of China.