1. Professor, College of Civil Engineering, Nanjing Tech Univ., No. 30, Pu Zhu South Rd., Nanjing 211816, PR China (corresponding author).
2. Wadsworth Distinguished Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506.
3. Postgraduate, College of Civil Engineering, Nanjing Tech Univ., No. 30, Pu Zhu South Rd., Nanjing 211816, PR China.
4. Research Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506.
5. Professor, College of Civil Engineering, Nanjing Tech Univ., No. 30, Pu Zhu South Rd., Nanjing 211816, PR China.