1. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, P.R. China;
2. Mechanical Engineering Department, Texas A&M University, College Station, Texas, USA;
3. Mechanical and Aerospace Engineering Department, Politecnico di Torino, Torino, Italy;
4. State Key Laboratory of Structure Analysis of Industrial Equipment, Department of Engineering Mechanics, International Center for Computational Mechanics, Dalian University of Technology, Dalian, P.R. China