1. Graduate Student, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China.
2. Professor, Key Laboratory for Wind and Bridge Engineering of Hunan Province, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China (corresponding author).
3. Professor, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan Univ., Changsha, Hunan 410082, China.