1. Dept. School of Civil Engineering, Hunan Univ. of Technology, Zhuzhou 412007, China
2. Professor, Dept. School of Civil Engineering, Hunan Univ. of Technology, Zhuzhou 412007, China
3. Professor, Dept. Beijing Advanced Innovation Center for Future Urban Design, Beijjng Univ. of Civil Engineering and Architecture, Beijing 100044, China (corresponding author).