1. Ph.D. Candidate, College of Civil and Transportation Engineering, Hohai Univ., Nanjing 210098, PR China.
2. Professor, College of Civil and Transportation Engineering, Hohai Univ., Nanjing 210098, PR China (corresponding author).
3. Professor, School of Civil Engineering, Shangdong Jianzhu Univ., Jinan 250101, PR China.