1. Ph.D. Candidate, Dept. of Structural Engineering, Tongji Univ., 1239 Siping Rd., Shanghai 200092, China.
2. Professor, Dept. of Structural Engineering, Tongji Univ., 1239 Siping Rd., Shanghai 200092, China.
3. Assistant Professor, Dept. of Structural Engineering, Tongji Univ., 1239 Siping Rd., Shanghai 200092, China (corresponding author).