1. PhD Student, Dept. of Civil Engineering, Fuzhou Univ., Fuzhou, Fujian Province, 350002, People’s Republic of China.
2. Professor, Dept. of Civil Engineering, Central South Univ., Changsha, Hunan Province, 410075, People’s Republic of China and Professor, Dept. of Civil. Engineering, Fuzhou Univ., Fuzhou, Fujian Province, 350002, People’s Republic of China; (corresponding author).