1. Associate Professor, College of Civil Engineering, Fuzhou Univ., No.2 Xueyuan Rd., Fuzhou, Fujian Province 350108, Peoples R China.
2. Graduate Student, College of Civil Engineering, Fuzhou Univ., No.2 Xueyuan Rd., Fuzhou, Fujian Province 350108, Peoples R China.
3. Professor, College of Civil Engineering, Fuzhou Univ., No.2 Xueyuan Rd., Fuzhou, Fujian Province 350108, Peoples R China.