1. Professor, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-301 West Building of Architecture and Civil Engineering, Beijing 100124, China.
2. Ph.D. Candidate, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-301 West Building of Architecture and Civil Engineering, Beijing 100124, China (corresponding author).
3. Ph.D. Candidate, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-301 West Building of Architecture and Civil Engineering, Beijing 100124, China.