1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, P. R. China
2. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, P. R. China
3. Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, P. R. China
4. Engineering and Technology Research Centre, CCCC Highway Consultants Co., Ltd. (HPDI), Beijing, P. R. China