1. Professor, College of Civil Engineering and Transportation, Hohai Univ., Xikang Rd. No. 1, Nanjing, Jiangsu 210098, China.
2. Associate Professor, Dept. of Civil and Structural Engineering, Hong Kong Polytechnic Univ., Hung Hom, Hong Kong SAR (corresponding author).
3. Research Assistant, College of Civil Engineering and Transportation, Hohai Univ., Xikang Rd. No. 1, Nanjing, Jiangsu 210098, China.