1. Engineer, Beijing Aeronautical Science and Technology Research Institute, Beijing 100080, China.
2. Deputy Chief Engineer, Beijing Aeronautical Science and Technology Research Institute, Beijing 100080, China.
3. Associate Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410004, China.
4. Professor, School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410004, China.
5. Associate professor, Arizona State Univ., 1151 S. Forest Ave., Tempe, AZ 85281 (corresponding author).