1. School of Civil Engineering, Chongqing University, Chongqing, China
2. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, China
3. Chongqing Research Institute of Harbin Institute of Technology, Harbin Institute of Technology, Chongqing, China
4. Key Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Ministry of Education, Chongqing, China
5. Department of Civil and Environmental Engineering, University of California, Irvine, CA, USA