1. Director, Ministry of Education Key Laboratory of Building Safety and Energy Efficiency, Center for Integrated Protection Research of Engineering Structures, Hunan Univ., Changsha, Hunan 410082, China; and Professor, Dept. of Civil Engineering, Univ. of Southern California, Los Angeles, CA 90089-2531 (corresponding author). E-mail: yanxiao@usc.edu
2. Henan Electric Power Survey and Design Institute, Zhengzhou 450007, China; formerly, Research Assistant, Center for Integrated Protection Research of Engineering Structures, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China.
3. Hunan Province Communication Planning Survey and Design Institute, Changsha 410008, China.
4. Professor, Dept. of Civil Engineering, Univ. of California, Davis, CA 95616.
5. Research Assistant, Center for Integrated Protection Research of Engineering Structures, College of Civil Engineering, Hunan Univ., Changsha, Hunan 410082, China.