1. Postgraduate Researcher, College of Civil Engineering, Northeast Forestry Univ., Harbin 150040, China; Postgraduate Researcher, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong 999077, China.
2. Ph.D. Candidate, School of Infrastructure Engineering, Dalian Univ. of Technology, No. 2, Linggong Rd., Ganjingzi District, Dalian 116024, China (corresponding author).