1. Associate Professor, State Key Laboratory of Ocean Engineering, Dept. of Civil Engineering, Shanghai Jiao Tong Univ., Shanghai 200240, China (corresponding author).
2. Graduate Student, Dept. of Civil Engineering, Shanghai Jiao Tong Univ., Shanghai 200240, China.
3. Professor, Dept. of Civil Engineering, Monash Univ., Melbourne, VIC 3168, Australia.