1. a Department of Civil Engineering, Dalian University of Technology, 116024 Dalian, China
2. b Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
3. c Department of Civil Engineering, Dalian University of Technology, 116024 Dalian, China
4. d Department of Civil Engineering, Dalian University of Technology, 116024 Dalian, China