1. Associate Professor, School of Civil Engineering, Lanzhou Jiaotong Univ., Lanzhou 730070, China.
2. Professor, School of Civil Engineering, Lanzhou Jiaotong Univ., Lanzhou 730070, China.
3. Postdoctoral Fellow, School of Materials Science and Engineering, Southeast Univ., Nanjing 211189, China; formerly, Research Assistant, Dept. of Civil, Architectural, and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409 (corresponding author).
4. Associate Professor, School of Civil Engineering, Tianjin Univ., Tianjin 300000, China.
5. Master Student, School of Civil Engineering, Lanzhou Jiaotong Univ., Lanzhou 730070, China.