[1] Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
[2] Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou 730000, China
[3] Western Center for Disaster Mitigation in Civil Engineering, Ministry of Education, Lanzhou 730050, China
[4] National Engineering Research Center for Conservation of Ancient Aall Painting, Dunhuang 736200, China