1. Ph.D. Student, State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., 1239, Siping Rd., Shanghai 200092, P.R. China.
2. Graduate Student, State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., 1239, Siping Rd., Shanghai 200092, P.R. China.
3. Professor, State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., 1239, Siping Rd., Shanghai 200092, P.R. China (corresponding author).