1. Ph.D. Candidate, School of Civil Engineering, Tianjin Univ., Tianjin 300072, China.
2. Professor, School of Civil Engineering, Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin Univ., Tianjin 300072, China.
3. Associate Professor, School of Civil Engineering, Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin Univ., Tianjin 300072, China (corresponding author).
4. Research Associate, Dept. of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK.