1. Professor, Joint Research Center of Structural Monitoring and Protection, Tianjin Univ., Tianjin, China; and School of Civil and Mechanical Engineering, Curtin Univ., Bentley, GPO Box U1987, Perth, WA 6845, Australia.
2. Professor, Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin Univ., Tianjin 300072, China; and School of Civil Engineering, Tianjin Univ., Tianjin 300072, China.
3. Associate Professor, Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin Univ., Tianjin 300072, China; and School of Civil Engineering, Tianjin Univ., Tianjin 300072, China (corresponding author).