1. Associate Professor, College of Civil Engineering, Fuzhou Univ., No. 2 Xueyuan Rd., University Town, Fuzhou, Fujian 350108, China (corresponding author).
2. M.Sc. Candidate, College of Civil Engineering, Fuzhou Univ., No. 2 Xueyuan Rd., University Town, Fuzhou, Fujian 350108, China.