1. Associate Professor, School of Civil Engineering, Central South University, Changsha, P. R. China
2. Postgraduate student, School of Civil Engineering, Central South University, Changsha, P. R. China
3. Distinguished Professor, School of Civil Engineering, Central South University, Changsha, P. R. China; State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, P. R. China (corresponding author: )