1. Associate Professor, Dept. of Civil Engineering and Key Laboratory of Coast Civil Structure Safety, Tianjin Univ., No. 92 Weijin Rd., Nankai District, Tianjin 300072, China.
2. Dept. of Civil Engineering, Tianjin Univ., No. 92 Weijin Rd., Nankai District, Tianjin 300072, China.
3. Associate Professor, Dept. of Civil Engineering, Tianjin Univ., No. 92 Weijin Rd., Nankai District, Tianjin 300072, China (corresponding author).