1. Professor, Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education, School of Civil Engineering and Architecture, Guangxi Univ., Nanning 530004, China.
2. Associate Professor, Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education, School of Civil Engineering and Architecture, Guangxi Univ., Nanning 530004, China (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095.