1. Key Laboratory of Mechanics on Disaster and Environment in Western China, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, China
2. Department of Materials Science and Engineering, The University of Arizona, Tucson, Arizona, USA
3. Western Center for Disaster Mitigation in Civil Engineering of Ministry of Education of China, School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China
4. Department of International Engineering, China JK Institute of Engineering Investigation and Design Co.Ltd, Xian, China