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