1. Associate Professor, College of Civil and Architecture Engineering, Guilin Univ. of Technology, Guangxi Province, Guilin 541004, China.
2. Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Missouri Univ. of Science and Technology, 1401 N Pine St., Rolla, MO 65409-0030 (corresponding author).
3. Professor, College of Civil Engineering and Architecture, Guangxi Univ., Guangxi Province, Nanning 530004, China.
4. Professor, College of Civil and Architecture Engineering, Guilin Univ. of Technology, Guangxi Province, Guilin 541004, China.