1. Ph.D. Candidate, Dept. of Structural Engineering, Tongji Univ., A422, Tumu Building, Shanghai 200092, People’s Republic of China.
2. Professor, Dept. of Civil Engineering, Technical Univ. of Denmark, Building 118, Brovej, 2800 Kongens Lyngby, Denmark.
3. Professor, State Key Laboratory of Disaster Reduction in Civil Engineering and Dept. of Structural Engineering, Tongji Univ., A409, Tumu Building, Shanghai 200092, People’s Republic of China (corresponding author).