1. Ph.D. Candidate, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, China.
2. Professor, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, China.
3. Engineer, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, China.
4. Associate Professor, Dept. of Structural Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).