1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University 1 , Shijiazhuang 050043, China
2. Department of Engineering Mechanics, Shijiazhuang Tiedao University 2 , Shijiazhuang 050043, China
3. Department of Mechanics, School of Mechanical Engineering, Tianjin University 3 , Tianjin 300350, China
4. Institute of Engineering Mechanics, Beijing Jiaotong University 4 , Beijing 100044, China