1. Graduate Research Assistant, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China.
2. Chair Professor, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China (corresponding author).
3. Postdoctor, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China.