1. Professor, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-410 West Building of Architecture and Civil Engineering, Beijing 100124, China (corresponding author).
2. Ph.D. Candidate, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-405 West Building of Architecture and Civil Engineering, Beijing 100124, China.
3. Professor, College of Architecture and Civil Engineering, Beijing Univ. of Technology, 2-301 West Building of Architecture and Civil Engineering, Beijing 100124, China.