1. Lecturer, Dept. of Civil and Environmental Engineering, Ningbo Univ., No. 818, Fenghua St., Ningbo 315211, PR China.
2. Professor, Dept. of Civil Engineering, Nanjing Univ. of Aeronautics and Astronautics, No. 29, Jiangjun Ave., Nanjing 210016, PR China (corresponding author).
3. Lecturer, Dept. of Civil Engineering, Nanjing Univ. of Aeronautics and Astronautics, No. 29, Jiangjun Ave., Nanjing 210016, PR China.
4. Professor, Dept. of Civil and Environmental Engineering, Ningbo Univ., No. 818, Fenghua St., Ningbo 315211, PR China.
5. Associate Professor, Dept. of Civil and Environmental Engineering, Ningbo Univ., No. 818, Fenghua St., Ningbo 315211, PR China.