1. Ph.D. Student, School of Civil Engineering, Southwest Jiaotong Univ., No. 111, 1st Section, North of Second Ring Rd., Chengdu, Sichuan 610031, China.
2. Master’s Student, School of Civil Engineering, Southwest Jiaotong Univ., No. 111, 1st Section, North of Second Ring Rd., Chengdu, Sichuan 610031, China.
3. Professor, School of Civil Engineering, Southwest Jiaotong Univ., No. 111, 1st Section, North of Second Ring Rd., Chengdu, Sichuan 610031, China (corresponding author).