1. Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
3. Department of Civil & Environmental Engineering, Brunel University London, Uxbridge, Middlesex UB8 3PH, U.K.
4. Faculty of Innovation Engineering, Macau University of Science and Technology, Macao SAR 999078, PR China