1. Lecturer, Key Laboratory of Coastal Disaster and Defense, Hohai Univ., Ministry of Education, Nanjing 210098, China; Research Fellow, School of Civil and Environmental Engineering, Nanyang Technological Univ., 639798 Singapore.
2. Graduate Student, School of Civil and Environmental Engineering, Nanyang Technological Univ., 639798 Singapore.
3. Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., 639798 Singapore (corresponding author).