1. Associate Professor, School of Civil Engineering, Dalian Univ. of Technology, Dalian 116024, China (corresponding author).
2. Ph.D. Candidate, School of Civil Engineering, Dalian Univ. of Technology, Dalian 116024, China.
3. Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha 410114, China.