1. Associate Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China; Visiting Scholar, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015.
2. Ph.D. Candidate, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China (corresponding author).
3. Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China.