1. Professor, State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin Univ., 135 Yaguan Rd., Tianjin 300350, China.
2. Ph.D. Candidate, State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin Univ., 135 Yaguan Rd., Tianjin 300350, China.
3. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin Univ., 135 Yaguan Rd., Tianjin 300350, China (corresponding author).
4. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, Knoxville, 851 Neyland Dr., Knoxville, TN 37902.