1. Professor, Dept. of Bridge Engineering, School of Civil Engineering, Tongji Univ., Shanghai 200092, China.
2. Ph.D. Candidate, Dept. of Bridge Engineering, School of Civil Engineering, Tongji Univ., Shanghai 200092, China.
3. Associate Professor, Dept. of Bridge Engineering, School of Civil Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).