1. College of Civil and Transportation Engineering, Hohai Univ., Nanjing 210098, China (corresponding author).
2. Professor, Key Laboratory of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China.
3. Associate Professor, College of Civil and Transportation Engineering, Hohai Univ., Nanjing 210098, China.
4. Professor, School of Civil Engineering, Beijing Jiaotong Univ., Beijing 100044, China; Guest Professor, Dept. of Architectural Engineering, Tokyo Polytechnic Univ., Kanagawa 243-0297, Japan.