1. Research Assistant, College of Architecture and Civil Engineering, Beijing Univ. of Technology, Beijing 100124, China.
2. Professor, College of Architecture and Civil Engineering, Beijing Univ. of Technology, Beijing 100124, China.
3. Professor, College of Architecture and Civil Engineering, Beijing Univ. of Technology, Beijing 100124, China (corresponding author).
4. Lecturer, College of Architecture and Civil Engineering, Beijing Univ. of Technology, Beijing 100124, China.